diff --git a/app/Console/Commands/UpgradeFireflyInstructions.php b/app/Console/Commands/UpgradeFireflyInstructions.php
index 36c4d7f472..b15d3c4936 100644
--- a/app/Console/Commands/UpgradeFireflyInstructions.php
+++ b/app/Console/Commands/UpgradeFireflyInstructions.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Console\Commands;
 
diff --git a/app/Console/Kernel.php b/app/Console/Kernel.php
index 88960c8a36..7ce107879b 100644
--- a/app/Console/Kernel.php
+++ b/app/Console/Kernel.php
@@ -1,4 +1,6 @@
 <?php
+declare(strict_types = 1);
+
 /**
  * Kernel.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Events/Event.php b/app/Events/Event.php
index 1e3574c8d3..74534b1d8b 100644
--- a/app/Events/Event.php
+++ b/app/Events/Event.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Events;
 
 /**
diff --git a/app/Events/TransactionJournalStored.php b/app/Events/TransactionJournalStored.php
index 0e5be2027b..3110225d24 100644
--- a/app/Events/TransactionJournalStored.php
+++ b/app/Events/TransactionJournalStored.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * TransactionJournalStored.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Events/TransactionJournalUpdated.php b/app/Events/TransactionJournalUpdated.php
index 0ea23204e3..edb9a82a12 100644
--- a/app/Events/TransactionJournalUpdated.php
+++ b/app/Events/TransactionJournalUpdated.php
@@ -1,4 +1,7 @@
-<?php namespace FireflyIII\Events;
+<?php
+declare(strict_types = 1);
+
+namespace FireflyIII\Events;
 
 use FireflyIII\Models\TransactionJournal;
 use Illuminate\Queue\SerializesModels;
diff --git a/app/Exceptions/FireflyException.php b/app/Exceptions/FireflyException.php
index c81f61eb7f..88714ef34e 100644
--- a/app/Exceptions/FireflyException.php
+++ b/app/Exceptions/FireflyException.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Exceptions;
 
 
diff --git a/app/Exceptions/Handler.php b/app/Exceptions/Handler.php
index 99c87fc1b0..051918b803 100644
--- a/app/Exceptions/Handler.php
+++ b/app/Exceptions/Handler.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Exceptions;
 
 use Exception;
diff --git a/app/Exceptions/NotImplementedException.php b/app/Exceptions/NotImplementedException.php
index c1f3ed4500..47c43b9e68 100644
--- a/app/Exceptions/NotImplementedException.php
+++ b/app/Exceptions/NotImplementedException.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 namespace FireflyIII\Exceptions;
 
 
diff --git a/app/Exceptions/ValidationException.php b/app/Exceptions/ValidationException.php
index aba658ac9b..5da65aab66 100644
--- a/app/Exceptions/ValidationException.php
+++ b/app/Exceptions/ValidationException.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 namespace FireflyIII\Exceptions;
 
 /**
diff --git a/app/Export/Collector/AttachmentCollector.php b/app/Export/Collector/AttachmentCollector.php
index 56dc9704d0..0e9f419870 100644
--- a/app/Export/Collector/AttachmentCollector.php
+++ b/app/Export/Collector/AttachmentCollector.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * AttachmentCollector.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Export/Collector/BasicCollector.php b/app/Export/Collector/BasicCollector.php
index 723d5ee637..5450608a6e 100644
--- a/app/Export/Collector/BasicCollector.php
+++ b/app/Export/Collector/BasicCollector.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * BasicCollector.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Export/Collector/CollectorInterface.php b/app/Export/Collector/CollectorInterface.php
index 21007a871d..82730425a7 100644
--- a/app/Export/Collector/CollectorInterface.php
+++ b/app/Export/Collector/CollectorInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * CollectorInterface.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Export/Collector/UploadCollector.php b/app/Export/Collector/UploadCollector.php
index 6cf04b52ac..803a7473c1 100644
--- a/app/Export/Collector/UploadCollector.php
+++ b/app/Export/Collector/UploadCollector.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * UploadCollector.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Export/ConfigurationFile.php b/app/Export/ConfigurationFile.php
index db86402d66..2ac9d6d216 100644
--- a/app/Export/ConfigurationFile.php
+++ b/app/Export/ConfigurationFile.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * ConfigurationFile.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Export/Entry.php b/app/Export/Entry.php
index 557abe33f3..e5ffc32688 100644
--- a/app/Export/Entry.php
+++ b/app/Export/Entry.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * Entry.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Export/Exporter/BasicExporter.php b/app/Export/Exporter/BasicExporter.php
index aaa8ea1dad..d74550abd9 100644
--- a/app/Export/Exporter/BasicExporter.php
+++ b/app/Export/Exporter/BasicExporter.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * BasicExporter.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Export/Exporter/CsvExporter.php b/app/Export/Exporter/CsvExporter.php
index 906667a5f2..48c4f3130b 100644
--- a/app/Export/Exporter/CsvExporter.php
+++ b/app/Export/Exporter/CsvExporter.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * CsvExporter.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Export/Exporter/ExporterInterface.php b/app/Export/Exporter/ExporterInterface.php
index b8f3431a51..a9d56edb8f 100644
--- a/app/Export/Exporter/ExporterInterface.php
+++ b/app/Export/Exporter/ExporterInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * ExporterInterface.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Export/JournalCollector.php b/app/Export/JournalCollector.php
index 4a66424b91..9356596f71 100644
--- a/app/Export/JournalCollector.php
+++ b/app/Export/JournalCollector.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * JournalCollector.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Export/Processor.php b/app/Export/Processor.php
index bd89e0bb0c..523c66e435 100644
--- a/app/Export/Processor.php
+++ b/app/Export/Processor.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * Processor.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Generator/Chart/Account/AccountChartGeneratorInterface.php b/app/Generator/Chart/Account/AccountChartGeneratorInterface.php
index 0e09e5e077..c8379d8744 100644
--- a/app/Generator/Chart/Account/AccountChartGeneratorInterface.php
+++ b/app/Generator/Chart/Account/AccountChartGeneratorInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * AccountChartGeneratorInterface.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Generator/Chart/Account/ChartJsAccountChartGenerator.php b/app/Generator/Chart/Account/ChartJsAccountChartGenerator.php
index 95892049cc..c0cc13aef3 100644
--- a/app/Generator/Chart/Account/ChartJsAccountChartGenerator.php
+++ b/app/Generator/Chart/Account/ChartJsAccountChartGenerator.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Generator\Chart\Account;
 
 use Carbon\Carbon;
diff --git a/app/Generator/Chart/Bill/BillChartGeneratorInterface.php b/app/Generator/Chart/Bill/BillChartGeneratorInterface.php
index a30220b410..4f0b36dded 100644
--- a/app/Generator/Chart/Bill/BillChartGeneratorInterface.php
+++ b/app/Generator/Chart/Bill/BillChartGeneratorInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * BillChartGeneratorInterface.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Generator/Chart/Bill/ChartJsBillChartGenerator.php b/app/Generator/Chart/Bill/ChartJsBillChartGenerator.php
index f191b48877..fb9ef0beea 100644
--- a/app/Generator/Chart/Bill/ChartJsBillChartGenerator.php
+++ b/app/Generator/Chart/Bill/ChartJsBillChartGenerator.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * ChartJsBillChartGenerator.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Generator/Chart/Budget/BudgetChartGeneratorInterface.php b/app/Generator/Chart/Budget/BudgetChartGeneratorInterface.php
index dbe988f585..3e59760772 100644
--- a/app/Generator/Chart/Budget/BudgetChartGeneratorInterface.php
+++ b/app/Generator/Chart/Budget/BudgetChartGeneratorInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * BudgetChartGeneratorInterface.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Generator/Chart/Budget/ChartJsBudgetChartGenerator.php b/app/Generator/Chart/Budget/ChartJsBudgetChartGenerator.php
index 94a648641a..a04697511d 100644
--- a/app/Generator/Chart/Budget/ChartJsBudgetChartGenerator.php
+++ b/app/Generator/Chart/Budget/ChartJsBudgetChartGenerator.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Generator\Chart\Budget;
 
 
diff --git a/app/Generator/Chart/Category/CategoryChartGeneratorInterface.php b/app/Generator/Chart/Category/CategoryChartGeneratorInterface.php
index 7357ab3225..870e3a39fa 100644
--- a/app/Generator/Chart/Category/CategoryChartGeneratorInterface.php
+++ b/app/Generator/Chart/Category/CategoryChartGeneratorInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * CategoryChartGeneratorInterface.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Generator/Chart/Category/ChartJsCategoryChartGenerator.php b/app/Generator/Chart/Category/ChartJsCategoryChartGenerator.php
index 520aef7d6b..f8b8ec3231 100644
--- a/app/Generator/Chart/Category/ChartJsCategoryChartGenerator.php
+++ b/app/Generator/Chart/Category/ChartJsCategoryChartGenerator.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Generator\Chart\Category;
 
 use Illuminate\Support\Collection;
diff --git a/app/Generator/Chart/PiggyBank/ChartJsPiggyBankChartGenerator.php b/app/Generator/Chart/PiggyBank/ChartJsPiggyBankChartGenerator.php
index 1f737573a3..6951f81eca 100644
--- a/app/Generator/Chart/PiggyBank/ChartJsPiggyBankChartGenerator.php
+++ b/app/Generator/Chart/PiggyBank/ChartJsPiggyBankChartGenerator.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Generator\Chart\PiggyBank;
 
 use Carbon\Carbon;
diff --git a/app/Generator/Chart/PiggyBank/PiggyBankChartGeneratorInterface.php b/app/Generator/Chart/PiggyBank/PiggyBankChartGeneratorInterface.php
index a45eace0e6..fed9e356fd 100644
--- a/app/Generator/Chart/PiggyBank/PiggyBankChartGeneratorInterface.php
+++ b/app/Generator/Chart/PiggyBank/PiggyBankChartGeneratorInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * PiggyBankChartGenerator.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Generator/Chart/Report/ChartJsReportChartGenerator.php b/app/Generator/Chart/Report/ChartJsReportChartGenerator.php
index fd749dfbaa..a9d969d510 100644
--- a/app/Generator/Chart/Report/ChartJsReportChartGenerator.php
+++ b/app/Generator/Chart/Report/ChartJsReportChartGenerator.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Generator\Chart\Report;
 
 use Illuminate\Support\Collection;
diff --git a/app/Generator/Chart/Report/ReportChartGeneratorInterface.php b/app/Generator/Chart/Report/ReportChartGeneratorInterface.php
index 25060a8f46..c08654bd56 100644
--- a/app/Generator/Chart/Report/ReportChartGeneratorInterface.php
+++ b/app/Generator/Chart/Report/ReportChartGeneratorInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * ReportChartGenerator.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Handlers/Events/ConnectJournalToPiggyBank.php b/app/Handlers/Events/ConnectJournalToPiggyBank.php
index 0b6c96da8a..59429bbbec 100644
--- a/app/Handlers/Events/ConnectJournalToPiggyBank.php
+++ b/app/Handlers/Events/ConnectJournalToPiggyBank.php
@@ -1,4 +1,7 @@
-<?php namespace FireflyIII\Handlers\Events;
+<?php
+declare(strict_types = 1);
+
+namespace FireflyIII\Handlers\Events;
 
 use Auth;
 use FireflyIII\Events\TransactionJournalStored;
diff --git a/app/Handlers/Events/FireRulesForStore.php b/app/Handlers/Events/FireRulesForStore.php
index 0c3a67bc46..ecb3146cc7 100644
--- a/app/Handlers/Events/FireRulesForStore.php
+++ b/app/Handlers/Events/FireRulesForStore.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * FireRulesForStore.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Handlers/Events/FireRulesForUpdate.php b/app/Handlers/Events/FireRulesForUpdate.php
index e829ee16b8..1f194166d3 100644
--- a/app/Handlers/Events/FireRulesForUpdate.php
+++ b/app/Handlers/Events/FireRulesForUpdate.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * FireRulesForUpdate.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Handlers/Events/ScanForBillsAfterStore.php b/app/Handlers/Events/ScanForBillsAfterStore.php
index 05fdff406f..39cedad621 100644
--- a/app/Handlers/Events/ScanForBillsAfterStore.php
+++ b/app/Handlers/Events/ScanForBillsAfterStore.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * RescanJournalAfterStore.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Handlers/Events/ScanForBillsAfterUpdate.php b/app/Handlers/Events/ScanForBillsAfterUpdate.php
index 5aec28cb61..1b82f7956c 100644
--- a/app/Handlers/Events/ScanForBillsAfterUpdate.php
+++ b/app/Handlers/Events/ScanForBillsAfterUpdate.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * ScanForBillsAfterUpdate.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Handlers/Events/UpdateJournalConnection.php b/app/Handlers/Events/UpdateJournalConnection.php
index e04b44f088..a42be4cf81 100644
--- a/app/Handlers/Events/UpdateJournalConnection.php
+++ b/app/Handlers/Events/UpdateJournalConnection.php
@@ -1,4 +1,6 @@
-<?php namespace FireflyIII\Handlers\Events;
+<?php
+declare(strict_types = 1);
+namespace FireflyIII\Handlers\Events;
 
 use FireflyIII\Events\TransactionJournalUpdated;
 use FireflyIII\Models\PiggyBankEvent;
diff --git a/app/Helpers/Attachments/AttachmentHelper.php b/app/Helpers/Attachments/AttachmentHelper.php
index a64f7ac1c2..69ff3bf376 100644
--- a/app/Helpers/Attachments/AttachmentHelper.php
+++ b/app/Helpers/Attachments/AttachmentHelper.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Attachments;
 
 use Auth;
diff --git a/app/Helpers/Attachments/AttachmentHelperInterface.php b/app/Helpers/Attachments/AttachmentHelperInterface.php
index bcc36a642f..84f86624a8 100644
--- a/app/Helpers/Attachments/AttachmentHelperInterface.php
+++ b/app/Helpers/Attachments/AttachmentHelperInterface.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Attachments;
 
 use FireflyIII\Models\Attachment;
diff --git a/app/Helpers/Collection/Account.php b/app/Helpers/Collection/Account.php
index 893d771a9f..a327f2760b 100644
--- a/app/Helpers/Collection/Account.php
+++ b/app/Helpers/Collection/Account.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Collection;
 
 use Illuminate\Support\Collection;
diff --git a/app/Helpers/Collection/Balance.php b/app/Helpers/Collection/Balance.php
index 9cc6887660..b075ac3482 100644
--- a/app/Helpers/Collection/Balance.php
+++ b/app/Helpers/Collection/Balance.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Collection;
 
 use Illuminate\Support\Collection;
diff --git a/app/Helpers/Collection/BalanceEntry.php b/app/Helpers/Collection/BalanceEntry.php
index f92ed56691..f916cbeba2 100644
--- a/app/Helpers/Collection/BalanceEntry.php
+++ b/app/Helpers/Collection/BalanceEntry.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Collection;
 
 use FireflyIII\Models\Account as AccountModel;
diff --git a/app/Helpers/Collection/BalanceHeader.php b/app/Helpers/Collection/BalanceHeader.php
index 5dbe86f5f6..55ba9b4f4d 100644
--- a/app/Helpers/Collection/BalanceHeader.php
+++ b/app/Helpers/Collection/BalanceHeader.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Collection;
 
 use FireflyIII\Models\Account as AccountModel;
diff --git a/app/Helpers/Collection/BalanceLine.php b/app/Helpers/Collection/BalanceLine.php
index 928a3c6f05..5df4350aba 100644
--- a/app/Helpers/Collection/BalanceLine.php
+++ b/app/Helpers/Collection/BalanceLine.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Collection;
 
 use FireflyIII\Models\Budget as BudgetModel;
diff --git a/app/Helpers/Collection/Bill.php b/app/Helpers/Collection/Bill.php
index 550f8f1aeb..95a30bbc79 100644
--- a/app/Helpers/Collection/Bill.php
+++ b/app/Helpers/Collection/Bill.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Collection;
 
 
diff --git a/app/Helpers/Collection/BillLine.php b/app/Helpers/Collection/BillLine.php
index ba6703f0b5..6a04708bd7 100644
--- a/app/Helpers/Collection/BillLine.php
+++ b/app/Helpers/Collection/BillLine.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Collection;
 
 use FireflyIII\Models\Bill as BillModel;
diff --git a/app/Helpers/Collection/Budget.php b/app/Helpers/Collection/Budget.php
index 8bb3e1385f..a5139d7093 100644
--- a/app/Helpers/Collection/Budget.php
+++ b/app/Helpers/Collection/Budget.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Collection;
 
 use Illuminate\Support\Collection;
diff --git a/app/Helpers/Collection/BudgetLine.php b/app/Helpers/Collection/BudgetLine.php
index d906da3fe6..d755a6cf02 100644
--- a/app/Helpers/Collection/BudgetLine.php
+++ b/app/Helpers/Collection/BudgetLine.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Collection;
 
 use FireflyIII\Models\Budget as BudgetModel;
diff --git a/app/Helpers/Collection/Category.php b/app/Helpers/Collection/Category.php
index d6dd0ac76a..1225c05ee6 100644
--- a/app/Helpers/Collection/Category.php
+++ b/app/Helpers/Collection/Category.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Collection;
 
 use FireflyIII\Models\Category as CategoryModel;
diff --git a/app/Helpers/Collection/Expense.php b/app/Helpers/Collection/Expense.php
index de31ab76d1..b380bfc134 100644
--- a/app/Helpers/Collection/Expense.php
+++ b/app/Helpers/Collection/Expense.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Collection;
 
 use Crypt;
diff --git a/app/Helpers/Collection/Income.php b/app/Helpers/Collection/Income.php
index ddaf21cdcb..e2d306f310 100644
--- a/app/Helpers/Collection/Income.php
+++ b/app/Helpers/Collection/Income.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Collection;
 
 use Crypt;
diff --git a/app/Helpers/Csv/Converter/AccountId.php b/app/Helpers/Csv/Converter/AccountId.php
index c489fa36a4..28f73d561b 100644
--- a/app/Helpers/Csv/Converter/AccountId.php
+++ b/app/Helpers/Csv/Converter/AccountId.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Converter;
 
 use Auth;
diff --git a/app/Helpers/Csv/Converter/Amount.php b/app/Helpers/Csv/Converter/Amount.php
index b33e15c9d4..c7ff345085 100644
--- a/app/Helpers/Csv/Converter/Amount.php
+++ b/app/Helpers/Csv/Converter/Amount.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Converter;
 
 /**
diff --git a/app/Helpers/Csv/Converter/AmountComma.php b/app/Helpers/Csv/Converter/AmountComma.php
index 49ce80cbb0..8bef0f30bd 100644
--- a/app/Helpers/Csv/Converter/AmountComma.php
+++ b/app/Helpers/Csv/Converter/AmountComma.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Converter;
 
 /**
diff --git a/app/Helpers/Csv/Converter/AssetAccountIban.php b/app/Helpers/Csv/Converter/AssetAccountIban.php
index 311e529a47..2da18150a5 100644
--- a/app/Helpers/Csv/Converter/AssetAccountIban.php
+++ b/app/Helpers/Csv/Converter/AssetAccountIban.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Converter;
 
 use Auth;
diff --git a/app/Helpers/Csv/Converter/AssetAccountName.php b/app/Helpers/Csv/Converter/AssetAccountName.php
index 87804875af..ead84e19a6 100644
--- a/app/Helpers/Csv/Converter/AssetAccountName.php
+++ b/app/Helpers/Csv/Converter/AssetAccountName.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Converter;
 
 use Auth;
diff --git a/app/Helpers/Csv/Converter/BasicConverter.php b/app/Helpers/Csv/Converter/BasicConverter.php
index 2c7bff6f2a..b1a262cae8 100644
--- a/app/Helpers/Csv/Converter/BasicConverter.php
+++ b/app/Helpers/Csv/Converter/BasicConverter.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Converter;
 
 /**
diff --git a/app/Helpers/Csv/Converter/BillId.php b/app/Helpers/Csv/Converter/BillId.php
index e584faa24b..5dcde18d9a 100644
--- a/app/Helpers/Csv/Converter/BillId.php
+++ b/app/Helpers/Csv/Converter/BillId.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Converter;
 
 use Auth;
diff --git a/app/Helpers/Csv/Converter/BillName.php b/app/Helpers/Csv/Converter/BillName.php
index 53c0aef7d3..e6229240d1 100644
--- a/app/Helpers/Csv/Converter/BillName.php
+++ b/app/Helpers/Csv/Converter/BillName.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Converter;
 
 use Auth;
diff --git a/app/Helpers/Csv/Converter/BudgetId.php b/app/Helpers/Csv/Converter/BudgetId.php
index 5fa10d1fb0..e1368f9299 100644
--- a/app/Helpers/Csv/Converter/BudgetId.php
+++ b/app/Helpers/Csv/Converter/BudgetId.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Converter;
 
 use Auth;
diff --git a/app/Helpers/Csv/Converter/BudgetName.php b/app/Helpers/Csv/Converter/BudgetName.php
index 3736c18996..a5e87490b3 100644
--- a/app/Helpers/Csv/Converter/BudgetName.php
+++ b/app/Helpers/Csv/Converter/BudgetName.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Converter;
 
 use Auth;
diff --git a/app/Helpers/Csv/Converter/CategoryId.php b/app/Helpers/Csv/Converter/CategoryId.php
index c5dcf760d4..f205f9edfe 100644
--- a/app/Helpers/Csv/Converter/CategoryId.php
+++ b/app/Helpers/Csv/Converter/CategoryId.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Converter;
 
 use Auth;
diff --git a/app/Helpers/Csv/Converter/CategoryName.php b/app/Helpers/Csv/Converter/CategoryName.php
index 54fa5b72f7..aff385378c 100644
--- a/app/Helpers/Csv/Converter/CategoryName.php
+++ b/app/Helpers/Csv/Converter/CategoryName.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Converter;
 
 use Auth;
diff --git a/app/Helpers/Csv/Converter/ConverterInterface.php b/app/Helpers/Csv/Converter/ConverterInterface.php
index 1eb2e37db9..643d17b6c1 100644
--- a/app/Helpers/Csv/Converter/ConverterInterface.php
+++ b/app/Helpers/Csv/Converter/ConverterInterface.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Converter;
 
 /**
diff --git a/app/Helpers/Csv/Converter/CurrencyCode.php b/app/Helpers/Csv/Converter/CurrencyCode.php
index c17d675457..98e01e5874 100644
--- a/app/Helpers/Csv/Converter/CurrencyCode.php
+++ b/app/Helpers/Csv/Converter/CurrencyCode.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Converter;
 
 use FireflyIII\Models\TransactionCurrency;
diff --git a/app/Helpers/Csv/Converter/CurrencyId.php b/app/Helpers/Csv/Converter/CurrencyId.php
index 25bf449850..ae1fb9af47 100644
--- a/app/Helpers/Csv/Converter/CurrencyId.php
+++ b/app/Helpers/Csv/Converter/CurrencyId.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Converter;
 
 use FireflyIII\Models\TransactionCurrency;
diff --git a/app/Helpers/Csv/Converter/CurrencyName.php b/app/Helpers/Csv/Converter/CurrencyName.php
index 95c57e7d31..4bdbe79c3a 100644
--- a/app/Helpers/Csv/Converter/CurrencyName.php
+++ b/app/Helpers/Csv/Converter/CurrencyName.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Converter;
 
 use FireflyIII\Models\TransactionCurrency;
diff --git a/app/Helpers/Csv/Converter/CurrencySymbol.php b/app/Helpers/Csv/Converter/CurrencySymbol.php
index 97184fdfb0..62cc92bcd6 100644
--- a/app/Helpers/Csv/Converter/CurrencySymbol.php
+++ b/app/Helpers/Csv/Converter/CurrencySymbol.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Converter;
 
 use FireflyIII\Models\TransactionCurrency;
diff --git a/app/Helpers/Csv/Converter/Date.php b/app/Helpers/Csv/Converter/Date.php
index 1024e6e42c..ca532738ba 100644
--- a/app/Helpers/Csv/Converter/Date.php
+++ b/app/Helpers/Csv/Converter/Date.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Converter;
 
 use Carbon\Carbon;
diff --git a/app/Helpers/Csv/Converter/Description.php b/app/Helpers/Csv/Converter/Description.php
index bb5626e251..8de2a48ece 100644
--- a/app/Helpers/Csv/Converter/Description.php
+++ b/app/Helpers/Csv/Converter/Description.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Converter;
 
 /**
diff --git a/app/Helpers/Csv/Converter/Ignore.php b/app/Helpers/Csv/Converter/Ignore.php
index a9dff94088..30cf747a86 100644
--- a/app/Helpers/Csv/Converter/Ignore.php
+++ b/app/Helpers/Csv/Converter/Ignore.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Converter;
 
 /**
diff --git a/app/Helpers/Csv/Converter/OpposingAccountIban.php b/app/Helpers/Csv/Converter/OpposingAccountIban.php
index 566c693665..87e2c10ec1 100644
--- a/app/Helpers/Csv/Converter/OpposingAccountIban.php
+++ b/app/Helpers/Csv/Converter/OpposingAccountIban.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Converter;
 
 use Auth;
diff --git a/app/Helpers/Csv/Converter/OpposingAccountId.php b/app/Helpers/Csv/Converter/OpposingAccountId.php
index 48d0cbe6e0..cf85478056 100644
--- a/app/Helpers/Csv/Converter/OpposingAccountId.php
+++ b/app/Helpers/Csv/Converter/OpposingAccountId.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Converter;
 
 use Auth;
diff --git a/app/Helpers/Csv/Converter/OpposingAccountName.php b/app/Helpers/Csv/Converter/OpposingAccountName.php
index ef9e9ad97c..0a2a1b8880 100644
--- a/app/Helpers/Csv/Converter/OpposingAccountName.php
+++ b/app/Helpers/Csv/Converter/OpposingAccountName.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Converter;
 
 use Auth;
diff --git a/app/Helpers/Csv/Converter/RabobankDebetCredit.php b/app/Helpers/Csv/Converter/RabobankDebetCredit.php
index 1861f6e172..a0945fcf5e 100644
--- a/app/Helpers/Csv/Converter/RabobankDebetCredit.php
+++ b/app/Helpers/Csv/Converter/RabobankDebetCredit.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Converter;
 
 
diff --git a/app/Helpers/Csv/Converter/TagsComma.php b/app/Helpers/Csv/Converter/TagsComma.php
index 9356856294..65c420e1d2 100644
--- a/app/Helpers/Csv/Converter/TagsComma.php
+++ b/app/Helpers/Csv/Converter/TagsComma.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Converter;
 
 use Auth;
diff --git a/app/Helpers/Csv/Converter/TagsSpace.php b/app/Helpers/Csv/Converter/TagsSpace.php
index 323f6005cc..278277eed2 100644
--- a/app/Helpers/Csv/Converter/TagsSpace.php
+++ b/app/Helpers/Csv/Converter/TagsSpace.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Converter;
 
 use Auth;
diff --git a/app/Helpers/Csv/Data.php b/app/Helpers/Csv/Data.php
index 5b0fc93474..92d4089db1 100644
--- a/app/Helpers/Csv/Data.php
+++ b/app/Helpers/Csv/Data.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv;
 
 use Crypt;
diff --git a/app/Helpers/Csv/Importer.php b/app/Helpers/Csv/Importer.php
index 48750670a9..7126eddefb 100644
--- a/app/Helpers/Csv/Importer.php
+++ b/app/Helpers/Csv/Importer.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv;
 
 use Auth;
diff --git a/app/Helpers/Csv/Mapper/AnyAccount.php b/app/Helpers/Csv/Mapper/AnyAccount.php
index dcfaefeec5..573e025f04 100644
--- a/app/Helpers/Csv/Mapper/AnyAccount.php
+++ b/app/Helpers/Csv/Mapper/AnyAccount.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Mapper;
 
 use Auth;
diff --git a/app/Helpers/Csv/Mapper/AssetAccount.php b/app/Helpers/Csv/Mapper/AssetAccount.php
index 75559c6b57..8131cd56dc 100644
--- a/app/Helpers/Csv/Mapper/AssetAccount.php
+++ b/app/Helpers/Csv/Mapper/AssetAccount.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Mapper;
 
 use Auth;
diff --git a/app/Helpers/Csv/Mapper/Bill.php b/app/Helpers/Csv/Mapper/Bill.php
index f94c7ccd7e..d0f9cb8c3d 100644
--- a/app/Helpers/Csv/Mapper/Bill.php
+++ b/app/Helpers/Csv/Mapper/Bill.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Mapper;
 
 use Auth;
diff --git a/app/Helpers/Csv/Mapper/Budget.php b/app/Helpers/Csv/Mapper/Budget.php
index 21a9683bbf..f5de27f0ff 100644
--- a/app/Helpers/Csv/Mapper/Budget.php
+++ b/app/Helpers/Csv/Mapper/Budget.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Mapper;
 
 use Auth;
diff --git a/app/Helpers/Csv/Mapper/Category.php b/app/Helpers/Csv/Mapper/Category.php
index c37b03cc85..cd9af4aba9 100644
--- a/app/Helpers/Csv/Mapper/Category.php
+++ b/app/Helpers/Csv/Mapper/Category.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Mapper;
 
 use Auth;
diff --git a/app/Helpers/Csv/Mapper/MapperInterface.php b/app/Helpers/Csv/Mapper/MapperInterface.php
index 533144074d..a8822163b4 100644
--- a/app/Helpers/Csv/Mapper/MapperInterface.php
+++ b/app/Helpers/Csv/Mapper/MapperInterface.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Mapper;
 
 /**
diff --git a/app/Helpers/Csv/Mapper/Tag.php b/app/Helpers/Csv/Mapper/Tag.php
index f0e687776c..d0a7feba36 100644
--- a/app/Helpers/Csv/Mapper/Tag.php
+++ b/app/Helpers/Csv/Mapper/Tag.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Mapper;
 
 use Auth;
diff --git a/app/Helpers/Csv/Mapper/TransactionCurrency.php b/app/Helpers/Csv/Mapper/TransactionCurrency.php
index 31b9e9c0c4..636b19520d 100644
--- a/app/Helpers/Csv/Mapper/TransactionCurrency.php
+++ b/app/Helpers/Csv/Mapper/TransactionCurrency.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Mapper;
 
 use FireflyIII\Models\TransactionCurrency as TC;
diff --git a/app/Helpers/Csv/PostProcessing/Amount.php b/app/Helpers/Csv/PostProcessing/Amount.php
index 6713d7289c..c542139542 100644
--- a/app/Helpers/Csv/PostProcessing/Amount.php
+++ b/app/Helpers/Csv/PostProcessing/Amount.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 
 namespace FireflyIII\Helpers\Csv\PostProcessing;
 
diff --git a/app/Helpers/Csv/PostProcessing/AssetAccount.php b/app/Helpers/Csv/PostProcessing/AssetAccount.php
index a3a91f2de4..8e12cb3b61 100644
--- a/app/Helpers/Csv/PostProcessing/AssetAccount.php
+++ b/app/Helpers/Csv/PostProcessing/AssetAccount.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\PostProcessing;
 
 use Auth;
diff --git a/app/Helpers/Csv/PostProcessing/Bill.php b/app/Helpers/Csv/PostProcessing/Bill.php
index 22a1993edd..de81b8b3c4 100644
--- a/app/Helpers/Csv/PostProcessing/Bill.php
+++ b/app/Helpers/Csv/PostProcessing/Bill.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\PostProcessing;
 
 /**
diff --git a/app/Helpers/Csv/PostProcessing/Currency.php b/app/Helpers/Csv/PostProcessing/Currency.php
index e5014120be..91d34f8677 100644
--- a/app/Helpers/Csv/PostProcessing/Currency.php
+++ b/app/Helpers/Csv/PostProcessing/Currency.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\PostProcessing;
 
 use FireflyIII\Models\TransactionCurrency;
diff --git a/app/Helpers/Csv/PostProcessing/Description.php b/app/Helpers/Csv/PostProcessing/Description.php
index 4854517cee..15a0a649d8 100644
--- a/app/Helpers/Csv/PostProcessing/Description.php
+++ b/app/Helpers/Csv/PostProcessing/Description.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\PostProcessing;
 
 /**
diff --git a/app/Helpers/Csv/PostProcessing/OpposingAccount.php b/app/Helpers/Csv/PostProcessing/OpposingAccount.php
index 2a0e3f6e2b..cbce96f679 100644
--- a/app/Helpers/Csv/PostProcessing/OpposingAccount.php
+++ b/app/Helpers/Csv/PostProcessing/OpposingAccount.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\PostProcessing;
 
 use Auth;
diff --git a/app/Helpers/Csv/PostProcessing/PostProcessorInterface.php b/app/Helpers/Csv/PostProcessing/PostProcessorInterface.php
index 88c0b60559..a6a793c3d5 100644
--- a/app/Helpers/Csv/PostProcessing/PostProcessorInterface.php
+++ b/app/Helpers/Csv/PostProcessing/PostProcessorInterface.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\PostProcessing;
 
 
diff --git a/app/Helpers/Csv/Specifix/AbnAmroDescription.php b/app/Helpers/Csv/Specifix/AbnAmroDescription.php
index 19655ef599..ab26416ecf 100644
--- a/app/Helpers/Csv/Specifix/AbnAmroDescription.php
+++ b/app/Helpers/Csv/Specifix/AbnAmroDescription.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Specifix;
 
 use Log;
diff --git a/app/Helpers/Csv/Specifix/Dummy.php b/app/Helpers/Csv/Specifix/Dummy.php
index 3dc94e5cb0..2e4263a4d5 100644
--- a/app/Helpers/Csv/Specifix/Dummy.php
+++ b/app/Helpers/Csv/Specifix/Dummy.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Specifix;
 
 /**
diff --git a/app/Helpers/Csv/Specifix/RabobankDescription.php b/app/Helpers/Csv/Specifix/RabobankDescription.php
index 83c6039184..249fc00cfe 100644
--- a/app/Helpers/Csv/Specifix/RabobankDescription.php
+++ b/app/Helpers/Csv/Specifix/RabobankDescription.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Specifix;
 
 use Log;
diff --git a/app/Helpers/Csv/Specifix/Specifix.php b/app/Helpers/Csv/Specifix/Specifix.php
index 9a855b32a1..fa51625e8e 100644
--- a/app/Helpers/Csv/Specifix/Specifix.php
+++ b/app/Helpers/Csv/Specifix/Specifix.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * Specifix.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Helpers/Csv/Specifix/SpecifixInterface.php b/app/Helpers/Csv/Specifix/SpecifixInterface.php
index 852ea96cca..b6534fbe51 100644
--- a/app/Helpers/Csv/Specifix/SpecifixInterface.php
+++ b/app/Helpers/Csv/Specifix/SpecifixInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv\Specifix;
 
 /**
diff --git a/app/Helpers/Csv/Wizard.php b/app/Helpers/Csv/Wizard.php
index 92e2bc6e0f..2ee7efdacc 100644
--- a/app/Helpers/Csv/Wizard.php
+++ b/app/Helpers/Csv/Wizard.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Csv;
 
 use Auth;
diff --git a/app/Helpers/Csv/WizardInterface.php b/app/Helpers/Csv/WizardInterface.php
index 1905f42d61..815a432a43 100644
--- a/app/Helpers/Csv/WizardInterface.php
+++ b/app/Helpers/Csv/WizardInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Helpers\Csv;
 
diff --git a/app/Helpers/FiscalHelper.php b/app/Helpers/FiscalHelper.php
index 5b15450be8..224fc5a025 100644
--- a/app/Helpers/FiscalHelper.php
+++ b/app/Helpers/FiscalHelper.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Helpers;
 
diff --git a/app/Helpers/FiscalHelperInterface.php b/app/Helpers/FiscalHelperInterface.php
index e5f805a855..b812fb9324 100644
--- a/app/Helpers/FiscalHelperInterface.php
+++ b/app/Helpers/FiscalHelperInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Helpers;
 
diff --git a/app/Helpers/Help/Help.php b/app/Helpers/Help/Help.php
index 8bbb038627..b54a481224 100644
--- a/app/Helpers/Help/Help.php
+++ b/app/Helpers/Help/Help.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Help;
 
 use Cache;
diff --git a/app/Helpers/Help/HelpInterface.php b/app/Helpers/Help/HelpInterface.php
index 892e554f9e..d4805a659e 100644
--- a/app/Helpers/Help/HelpInterface.php
+++ b/app/Helpers/Help/HelpInterface.php
@@ -1,5 +1,5 @@
 <?php
-
+declare(strict_types = 1);
 namespace FireflyIII\Helpers\Help;
 
 /**
diff --git a/app/Helpers/Report/AccountReportHelper.php b/app/Helpers/Report/AccountReportHelper.php
index f6972d34f4..c5b6b1d770 100644
--- a/app/Helpers/Report/AccountReportHelper.php
+++ b/app/Helpers/Report/AccountReportHelper.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * AccountReportHelper.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Helpers/Report/AccountReportHelperInterface.php b/app/Helpers/Report/AccountReportHelperInterface.php
index e52dea4498..bf9f650633 100644
--- a/app/Helpers/Report/AccountReportHelperInterface.php
+++ b/app/Helpers/Report/AccountReportHelperInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * AccountReportHelperInterface.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Helpers/Report/BalanceReportHelper.php b/app/Helpers/Report/BalanceReportHelper.php
index ca1451d1a2..67654d89fd 100644
--- a/app/Helpers/Report/BalanceReportHelper.php
+++ b/app/Helpers/Report/BalanceReportHelper.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * BalanceReportHelper.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Helpers/Report/BalanceReportHelperInterface.php b/app/Helpers/Report/BalanceReportHelperInterface.php
index fc0629b08e..4ef5d725b6 100644
--- a/app/Helpers/Report/BalanceReportHelperInterface.php
+++ b/app/Helpers/Report/BalanceReportHelperInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * BalanceReportHelperInterface.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Helpers/Report/BudgetReportHelper.php b/app/Helpers/Report/BudgetReportHelper.php
index fbd49a8c89..cea6d69ff9 100644
--- a/app/Helpers/Report/BudgetReportHelper.php
+++ b/app/Helpers/Report/BudgetReportHelper.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * BudgetReportHelper.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Helpers/Report/BudgetReportHelperInterface.php b/app/Helpers/Report/BudgetReportHelperInterface.php
index 63b3a5a19f..69d479c3b0 100644
--- a/app/Helpers/Report/BudgetReportHelperInterface.php
+++ b/app/Helpers/Report/BudgetReportHelperInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * BudgetReportHelperInterface.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Helpers/Report/ReportHelper.php b/app/Helpers/Report/ReportHelper.php
index 6717282493..2e890fdb27 100644
--- a/app/Helpers/Report/ReportHelper.php
+++ b/app/Helpers/Report/ReportHelper.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Helpers\Report;
 
diff --git a/app/Helpers/Report/ReportHelperInterface.php b/app/Helpers/Report/ReportHelperInterface.php
index 1ff2fc08ef..3d1f71e4e7 100644
--- a/app/Helpers/Report/ReportHelperInterface.php
+++ b/app/Helpers/Report/ReportHelperInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Helpers\Report;
 
diff --git a/app/Helpers/Report/ReportQuery.php b/app/Helpers/Report/ReportQuery.php
index 24027b2e0c..830e38c87f 100644
--- a/app/Helpers/Report/ReportQuery.php
+++ b/app/Helpers/Report/ReportQuery.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Helpers\Report;
 
diff --git a/app/Helpers/Report/ReportQueryInterface.php b/app/Helpers/Report/ReportQueryInterface.php
index 0656ec2115..db1efc6d5a 100644
--- a/app/Helpers/Report/ReportQueryInterface.php
+++ b/app/Helpers/Report/ReportQueryInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Helpers\Report;
 
diff --git a/app/Http/Controllers/AttachmentController.php b/app/Http/Controllers/AttachmentController.php
index 861d8c7062..a0b6c0d202 100644
--- a/app/Http/Controllers/AttachmentController.php
+++ b/app/Http/Controllers/AttachmentController.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http\Controllers;
 
diff --git a/app/Http/Controllers/Auth/AuthController.php b/app/Http/Controllers/Auth/AuthController.php
index 09c88dfeb3..c72dabfde4 100644
--- a/app/Http/Controllers/Auth/AuthController.php
+++ b/app/Http/Controllers/Auth/AuthController.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http\Controllers\Auth;
 
diff --git a/app/Http/Controllers/Auth/PasswordController.php b/app/Http/Controllers/Auth/PasswordController.php
index 855cfb5924..e341c46372 100644
--- a/app/Http/Controllers/Auth/PasswordController.php
+++ b/app/Http/Controllers/Auth/PasswordController.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http\Controllers\Auth;
 
diff --git a/app/Http/Controllers/Chart/AccountController.php b/app/Http/Controllers/Chart/AccountController.php
index ff79d24537..4f0c5d365a 100644
--- a/app/Http/Controllers/Chart/AccountController.php
+++ b/app/Http/Controllers/Chart/AccountController.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http\Controllers\Chart;
 
diff --git a/app/Http/Controllers/Chart/BillController.php b/app/Http/Controllers/Chart/BillController.php
index 6772b4a4b6..aba1965f05 100644
--- a/app/Http/Controllers/Chart/BillController.php
+++ b/app/Http/Controllers/Chart/BillController.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http\Controllers\Chart;
 
diff --git a/app/Http/Controllers/Chart/BudgetController.php b/app/Http/Controllers/Chart/BudgetController.php
index 7e947476c2..41fe3213bd 100644
--- a/app/Http/Controllers/Chart/BudgetController.php
+++ b/app/Http/Controllers/Chart/BudgetController.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http\Controllers\Chart;
 
diff --git a/app/Http/Controllers/Chart/CategoryController.php b/app/Http/Controllers/Chart/CategoryController.php
index 99482bf2ea..2a503e1a50 100644
--- a/app/Http/Controllers/Chart/CategoryController.php
+++ b/app/Http/Controllers/Chart/CategoryController.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http\Controllers\Chart;
 
diff --git a/app/Http/Controllers/Chart/PiggyBankController.php b/app/Http/Controllers/Chart/PiggyBankController.php
index 45f3cf3cd0..bf2d91a445 100644
--- a/app/Http/Controllers/Chart/PiggyBankController.php
+++ b/app/Http/Controllers/Chart/PiggyBankController.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http\Controllers\Chart;
 
diff --git a/app/Http/Controllers/Chart/ReportController.php b/app/Http/Controllers/Chart/ReportController.php
index 1832a8ab6f..4a2f44868e 100644
--- a/app/Http/Controllers/Chart/ReportController.php
+++ b/app/Http/Controllers/Chart/ReportController.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http\Controllers\Chart;
 
diff --git a/app/Http/Controllers/Controller.php b/app/Http/Controllers/Controller.php
index 08328d8884..022193a759 100644
--- a/app/Http/Controllers/Controller.php
+++ b/app/Http/Controllers/Controller.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http\Controllers;
 
diff --git a/app/Http/Controllers/CsvController.php b/app/Http/Controllers/CsvController.php
index 24ef30c3ea..2193980f2d 100644
--- a/app/Http/Controllers/CsvController.php
+++ b/app/Http/Controllers/CsvController.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http\Controllers;
 
diff --git a/app/Http/Controllers/ExportController.php b/app/Http/Controllers/ExportController.php
index 01ee98ebcf..c898c05ab6 100644
--- a/app/Http/Controllers/ExportController.php
+++ b/app/Http/Controllers/ExportController.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * ExportController.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Http/Controllers/RuleController.php b/app/Http/Controllers/RuleController.php
index 22fc883e94..5ae5b60a4a 100644
--- a/app/Http/Controllers/RuleController.php
+++ b/app/Http/Controllers/RuleController.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * RuleController.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Http/Controllers/RuleGroupController.php b/app/Http/Controllers/RuleGroupController.php
index 8e436645d8..19e1466dbf 100644
--- a/app/Http/Controllers/RuleGroupController.php
+++ b/app/Http/Controllers/RuleGroupController.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http\Controllers;
 
diff --git a/app/Http/Controllers/TagController.php b/app/Http/Controllers/TagController.php
index a61d1e2d75..bc5b36e522 100644
--- a/app/Http/Controllers/TagController.php
+++ b/app/Http/Controllers/TagController.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http\Controllers;
 
diff --git a/app/Http/Kernel.php b/app/Http/Kernel.php
index 3c1c958dec..e52e40814f 100644
--- a/app/Http/Kernel.php
+++ b/app/Http/Kernel.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http;
 
diff --git a/app/Http/Middleware/Authenticate.php b/app/Http/Middleware/Authenticate.php
index 16ddd2e939..1cffb4f6c7 100644
--- a/app/Http/Middleware/Authenticate.php
+++ b/app/Http/Middleware/Authenticate.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http\Middleware;
 
diff --git a/app/Http/Middleware/Binder.php b/app/Http/Middleware/Binder.php
index c35b442513..a7d2c1d278 100644
--- a/app/Http/Middleware/Binder.php
+++ b/app/Http/Middleware/Binder.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http\Middleware;
 
diff --git a/app/Http/Middleware/EncryptCookies.php b/app/Http/Middleware/EncryptCookies.php
index 8784890ec9..b13c615701 100644
--- a/app/Http/Middleware/EncryptCookies.php
+++ b/app/Http/Middleware/EncryptCookies.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http\Middleware;
 
diff --git a/app/Http/Middleware/Range.php b/app/Http/Middleware/Range.php
index 76707624a4..584611dc7c 100644
--- a/app/Http/Middleware/Range.php
+++ b/app/Http/Middleware/Range.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 
 namespace FireflyIII\Http\Middleware;
diff --git a/app/Http/Middleware/RedirectIfAuthenticated.php b/app/Http/Middleware/RedirectIfAuthenticated.php
index 1cf76e8aa8..63462dea3d 100644
--- a/app/Http/Middleware/RedirectIfAuthenticated.php
+++ b/app/Http/Middleware/RedirectIfAuthenticated.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http\Middleware;
 
diff --git a/app/Http/Middleware/VerifyCsrfToken.php b/app/Http/Middleware/VerifyCsrfToken.php
index 413dde74b3..62c21ded02 100644
--- a/app/Http/Middleware/VerifyCsrfToken.php
+++ b/app/Http/Middleware/VerifyCsrfToken.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 namespace FireflyIII\Http\Middleware;
 
 use Illuminate\Foundation\Http\Middleware\VerifyCsrfToken as BaseVerifier;
diff --git a/app/Http/Requests/AccountFormRequest.php b/app/Http/Requests/AccountFormRequest.php
index cd2f71e86b..12b5400d18 100644
--- a/app/Http/Requests/AccountFormRequest.php
+++ b/app/Http/Requests/AccountFormRequest.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http\Requests;
 
diff --git a/app/Http/Requests/AttachmentFormRequest.php b/app/Http/Requests/AttachmentFormRequest.php
index 0dc97519bd..0f1583869a 100644
--- a/app/Http/Requests/AttachmentFormRequest.php
+++ b/app/Http/Requests/AttachmentFormRequest.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http\Requests;
 
diff --git a/app/Http/Requests/BillFormRequest.php b/app/Http/Requests/BillFormRequest.php
index 786997e445..0c749b3f17 100644
--- a/app/Http/Requests/BillFormRequest.php
+++ b/app/Http/Requests/BillFormRequest.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http\Requests;
 
diff --git a/app/Http/Requests/BudgetFormRequest.php b/app/Http/Requests/BudgetFormRequest.php
index 17330ca7b6..0a596e883a 100644
--- a/app/Http/Requests/BudgetFormRequest.php
+++ b/app/Http/Requests/BudgetFormRequest.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http\Requests;
 
diff --git a/app/Http/Requests/CategoryFormRequest.php b/app/Http/Requests/CategoryFormRequest.php
index 48dfe409b9..d563da0dc5 100644
--- a/app/Http/Requests/CategoryFormRequest.php
+++ b/app/Http/Requests/CategoryFormRequest.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http\Requests;
 
diff --git a/app/Http/Requests/CurrencyFormRequest.php b/app/Http/Requests/CurrencyFormRequest.php
index 4944df3dee..5375ecaded 100644
--- a/app/Http/Requests/CurrencyFormRequest.php
+++ b/app/Http/Requests/CurrencyFormRequest.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http\Requests;
 
diff --git a/app/Http/Requests/DeleteAccountFormRequest.php b/app/Http/Requests/DeleteAccountFormRequest.php
index b493095984..a3620bf1d2 100644
--- a/app/Http/Requests/DeleteAccountFormRequest.php
+++ b/app/Http/Requests/DeleteAccountFormRequest.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http\Requests;
 
diff --git a/app/Http/Requests/ExportFormRequest.php b/app/Http/Requests/ExportFormRequest.php
index 979d63cbbb..44d7d3f95a 100644
--- a/app/Http/Requests/ExportFormRequest.php
+++ b/app/Http/Requests/ExportFormRequest.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * ExportFormRequest.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Http/Requests/JournalFormRequest.php b/app/Http/Requests/JournalFormRequest.php
index 0fe499a2a4..758dd6f60a 100644
--- a/app/Http/Requests/JournalFormRequest.php
+++ b/app/Http/Requests/JournalFormRequest.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http\Requests;
 
diff --git a/app/Http/Requests/NewUserFormRequest.php b/app/Http/Requests/NewUserFormRequest.php
index 6135f4c6f1..d707b02caa 100644
--- a/app/Http/Requests/NewUserFormRequest.php
+++ b/app/Http/Requests/NewUserFormRequest.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http\Requests;
 
diff --git a/app/Http/Requests/PiggyBankFormRequest.php b/app/Http/Requests/PiggyBankFormRequest.php
index b67ee14502..a00b93d67b 100644
--- a/app/Http/Requests/PiggyBankFormRequest.php
+++ b/app/Http/Requests/PiggyBankFormRequest.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http\Requests;
 
diff --git a/app/Http/Requests/ProfileFormRequest.php b/app/Http/Requests/ProfileFormRequest.php
index 092f355724..e4b7064cc6 100644
--- a/app/Http/Requests/ProfileFormRequest.php
+++ b/app/Http/Requests/ProfileFormRequest.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http\Requests;
 
diff --git a/app/Http/Requests/Request.php b/app/Http/Requests/Request.php
index 8f7d18805c..45ff721553 100644
--- a/app/Http/Requests/Request.php
+++ b/app/Http/Requests/Request.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Http\Requests;
 
diff --git a/app/Http/Requests/RuleFormRequest.php b/app/Http/Requests/RuleFormRequest.php
index cee59baa52..940f594223 100644
--- a/app/Http/Requests/RuleFormRequest.php
+++ b/app/Http/Requests/RuleFormRequest.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * RuleFormRequest.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Http/Requests/RuleGroupFormRequest.php b/app/Http/Requests/RuleGroupFormRequest.php
index 34f9e2a9c7..c67a821ffa 100644
--- a/app/Http/Requests/RuleGroupFormRequest.php
+++ b/app/Http/Requests/RuleGroupFormRequest.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * RuleGroupFormRequest.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Http/Requests/TagFormRequest.php b/app/Http/Requests/TagFormRequest.php
index 17e46bec51..f9aeafeffc 100644
--- a/app/Http/Requests/TagFormRequest.php
+++ b/app/Http/Requests/TagFormRequest.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 namespace FireflyIII\Http\Requests;
 
 use Auth;
diff --git a/app/Http/breadcrumbs.php b/app/Http/breadcrumbs.php
index df5ff587a2..75d6044ba7 100644
--- a/app/Http/breadcrumbs.php
+++ b/app/Http/breadcrumbs.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 use Carbon\Carbon;
 use DaveJamesMiller\Breadcrumbs\Generator as BreadCrumbGenerator;
 use FireflyIII\Models\Account;
diff --git a/app/Http/routes.php b/app/Http/routes.php
index a77e391264..21c18374cf 100644
--- a/app/Http/routes.php
+++ b/app/Http/routes.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 // auth routes, i think
 Route::group(
diff --git a/app/Jobs/Job.php b/app/Jobs/Job.php
index 264fe0f180..97a3858ccc 100644
--- a/app/Jobs/Job.php
+++ b/app/Jobs/Job.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Jobs;
 
diff --git a/app/Models/Attachment.php b/app/Models/Attachment.php
index f0aa86f69a..4eeaad603c 100644
--- a/app/Models/Attachment.php
+++ b/app/Models/Attachment.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Models;
 
diff --git a/app/Models/ExportJob.php b/app/Models/ExportJob.php
index 29551fb331..a03e1bca94 100644
--- a/app/Models/ExportJob.php
+++ b/app/Models/ExportJob.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * ExportJob.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Models/Permission.php b/app/Models/Permission.php
index f0b6d51c46..7d0922d493 100644
--- a/app/Models/Permission.php
+++ b/app/Models/Permission.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Models;
 
diff --git a/app/Models/Role.php b/app/Models/Role.php
index 7b44740583..406f3db3fc 100644
--- a/app/Models/Role.php
+++ b/app/Models/Role.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 namespace FireflyIII\Models;
 
 
diff --git a/app/Models/Rule.php b/app/Models/Rule.php
index faf2110825..7186707559 100644
--- a/app/Models/Rule.php
+++ b/app/Models/Rule.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * Rule.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Models/RuleAction.php b/app/Models/RuleAction.php
index fd65f781d5..181a2ce287 100644
--- a/app/Models/RuleAction.php
+++ b/app/Models/RuleAction.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * RuleAction.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Models/RuleGroup.php b/app/Models/RuleGroup.php
index 88c3733836..215c54fbdd 100644
--- a/app/Models/RuleGroup.php
+++ b/app/Models/RuleGroup.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * RuleGroup.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Models/RuleTrigger.php b/app/Models/RuleTrigger.php
index fb504433a8..dc92048977 100644
--- a/app/Models/RuleTrigger.php
+++ b/app/Models/RuleTrigger.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * RuleTrigger.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Models/Tag.php b/app/Models/Tag.php
index a9b9e108d5..39ed16c9b8 100644
--- a/app/Models/Tag.php
+++ b/app/Models/Tag.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Models;
 
diff --git a/app/Providers/AppServiceProvider.php b/app/Providers/AppServiceProvider.php
index ca50e9b7ee..e370e91496 100644
--- a/app/Providers/AppServiceProvider.php
+++ b/app/Providers/AppServiceProvider.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Providers;
 
diff --git a/app/Providers/AuthServiceProvider.php b/app/Providers/AuthServiceProvider.php
index 7d3f4d2b73..db0aa37305 100644
--- a/app/Providers/AuthServiceProvider.php
+++ b/app/Providers/AuthServiceProvider.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Providers;
 
diff --git a/app/Providers/EventServiceProvider.php b/app/Providers/EventServiceProvider.php
index 7d0b742adf..97a78898e1 100644
--- a/app/Providers/EventServiceProvider.php
+++ b/app/Providers/EventServiceProvider.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Providers;
 
diff --git a/app/Providers/FireflyServiceProvider.php b/app/Providers/FireflyServiceProvider.php
index 46f5160c57..8be1d6ec55 100644
--- a/app/Providers/FireflyServiceProvider.php
+++ b/app/Providers/FireflyServiceProvider.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Providers;
 
diff --git a/app/Providers/RouteServiceProvider.php b/app/Providers/RouteServiceProvider.php
index db8667315f..32fa02f4f5 100644
--- a/app/Providers/RouteServiceProvider.php
+++ b/app/Providers/RouteServiceProvider.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Providers;
 
diff --git a/app/Repositories/Account/AccountRepository.php b/app/Repositories/Account/AccountRepository.php
index 5b6c7deeb8..1affad1770 100644
--- a/app/Repositories/Account/AccountRepository.php
+++ b/app/Repositories/Account/AccountRepository.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Repositories\Account;
 
diff --git a/app/Repositories/Account/AccountRepositoryInterface.php b/app/Repositories/Account/AccountRepositoryInterface.php
index 8f0d460abb..52087d666e 100644
--- a/app/Repositories/Account/AccountRepositoryInterface.php
+++ b/app/Repositories/Account/AccountRepositoryInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Repositories\Account;
 
diff --git a/app/Repositories/Attachment/AttachmentRepository.php b/app/Repositories/Attachment/AttachmentRepository.php
index 13f7f8f0a0..e486612bb8 100644
--- a/app/Repositories/Attachment/AttachmentRepository.php
+++ b/app/Repositories/Attachment/AttachmentRepository.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Repositories\Attachment;
 
diff --git a/app/Repositories/Attachment/AttachmentRepositoryInterface.php b/app/Repositories/Attachment/AttachmentRepositoryInterface.php
index 44ae352b15..37386e1467 100644
--- a/app/Repositories/Attachment/AttachmentRepositoryInterface.php
+++ b/app/Repositories/Attachment/AttachmentRepositoryInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Repositories\Attachment;
 
diff --git a/app/Repositories/Bill/BillRepository.php b/app/Repositories/Bill/BillRepository.php
index 075065b77f..55e210e2af 100644
--- a/app/Repositories/Bill/BillRepository.php
+++ b/app/Repositories/Bill/BillRepository.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Repositories\Bill;
 
diff --git a/app/Repositories/Bill/BillRepositoryInterface.php b/app/Repositories/Bill/BillRepositoryInterface.php
index 0cefc960c8..79b99edb8e 100644
--- a/app/Repositories/Bill/BillRepositoryInterface.php
+++ b/app/Repositories/Bill/BillRepositoryInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Repositories\Bill;
 
diff --git a/app/Repositories/Budget/BudgetRepository.php b/app/Repositories/Budget/BudgetRepository.php
index 19ca4c5ec5..c148fbcceb 100644
--- a/app/Repositories/Budget/BudgetRepository.php
+++ b/app/Repositories/Budget/BudgetRepository.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Repositories\Budget;
 
diff --git a/app/Repositories/Budget/BudgetRepositoryInterface.php b/app/Repositories/Budget/BudgetRepositoryInterface.php
index ac530f81c3..80d07ceb2e 100644
--- a/app/Repositories/Budget/BudgetRepositoryInterface.php
+++ b/app/Repositories/Budget/BudgetRepositoryInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Repositories\Budget;
 
diff --git a/app/Repositories/Category/CategoryRepository.php b/app/Repositories/Category/CategoryRepository.php
index f821c52a85..5d57235f69 100644
--- a/app/Repositories/Category/CategoryRepository.php
+++ b/app/Repositories/Category/CategoryRepository.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Repositories\Category;
 
diff --git a/app/Repositories/Category/CategoryRepositoryInterface.php b/app/Repositories/Category/CategoryRepositoryInterface.php
index 7de84fe660..ec89ccec5e 100644
--- a/app/Repositories/Category/CategoryRepositoryInterface.php
+++ b/app/Repositories/Category/CategoryRepositoryInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Repositories\Category;
 
diff --git a/app/Repositories/Category/SingleCategoryRepository.php b/app/Repositories/Category/SingleCategoryRepository.php
index 95c41a26fa..53c9cae7e4 100644
--- a/app/Repositories/Category/SingleCategoryRepository.php
+++ b/app/Repositories/Category/SingleCategoryRepository.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Repositories\Category;
 
diff --git a/app/Repositories/Category/SingleCategoryRepositoryInterface.php b/app/Repositories/Category/SingleCategoryRepositoryInterface.php
index cae94328d4..b954a0684a 100644
--- a/app/Repositories/Category/SingleCategoryRepositoryInterface.php
+++ b/app/Repositories/Category/SingleCategoryRepositoryInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Repositories\Category;
 
diff --git a/app/Repositories/Currency/CurrencyRepository.php b/app/Repositories/Currency/CurrencyRepository.php
index d7991b6098..28c4d35ca4 100644
--- a/app/Repositories/Currency/CurrencyRepository.php
+++ b/app/Repositories/Currency/CurrencyRepository.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Repositories\Currency;
 
diff --git a/app/Repositories/Currency/CurrencyRepositoryInterface.php b/app/Repositories/Currency/CurrencyRepositoryInterface.php
index 2514d08aba..9284ad24c7 100644
--- a/app/Repositories/Currency/CurrencyRepositoryInterface.php
+++ b/app/Repositories/Currency/CurrencyRepositoryInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Repositories\Currency;
 
diff --git a/app/Repositories/ExportJob/ExportJobRepository.php b/app/Repositories/ExportJob/ExportJobRepository.php
index de0a41bab4..4af61d72c8 100644
--- a/app/Repositories/ExportJob/ExportJobRepository.php
+++ b/app/Repositories/ExportJob/ExportJobRepository.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * ExportJobRepository.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Repositories/ExportJob/ExportJobRepositoryInterface.php b/app/Repositories/ExportJob/ExportJobRepositoryInterface.php
index e270a0227d..f48eff5cc5 100644
--- a/app/Repositories/ExportJob/ExportJobRepositoryInterface.php
+++ b/app/Repositories/ExportJob/ExportJobRepositoryInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * ExportJobRepositoryInterface.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Repositories/Journal/JournalRepository.php b/app/Repositories/Journal/JournalRepository.php
index cc152e2ff9..8e94cd7d79 100644
--- a/app/Repositories/Journal/JournalRepository.php
+++ b/app/Repositories/Journal/JournalRepository.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Repositories\Journal;
 
diff --git a/app/Repositories/Journal/JournalRepositoryInterface.php b/app/Repositories/Journal/JournalRepositoryInterface.php
index de65cf94ad..21b7d947cd 100644
--- a/app/Repositories/Journal/JournalRepositoryInterface.php
+++ b/app/Repositories/Journal/JournalRepositoryInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Repositories\Journal;
 
diff --git a/app/Repositories/PiggyBank/PiggyBankRepository.php b/app/Repositories/PiggyBank/PiggyBankRepository.php
index cec8eeec5e..4713c4e278 100644
--- a/app/Repositories/PiggyBank/PiggyBankRepository.php
+++ b/app/Repositories/PiggyBank/PiggyBankRepository.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Repositories\PiggyBank;
 
diff --git a/app/Repositories/PiggyBank/PiggyBankRepositoryInterface.php b/app/Repositories/PiggyBank/PiggyBankRepositoryInterface.php
index 3ce36c36b6..d57f6300c0 100644
--- a/app/Repositories/PiggyBank/PiggyBankRepositoryInterface.php
+++ b/app/Repositories/PiggyBank/PiggyBankRepositoryInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Repositories\PiggyBank;
 
diff --git a/app/Repositories/Rule/RuleRepository.php b/app/Repositories/Rule/RuleRepository.php
index 213b484e03..d53e3aeaae 100644
--- a/app/Repositories/Rule/RuleRepository.php
+++ b/app/Repositories/Rule/RuleRepository.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * RuleRepository.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Repositories/Rule/RuleRepositoryInterface.php b/app/Repositories/Rule/RuleRepositoryInterface.php
index 21f554ff48..02330b97da 100644
--- a/app/Repositories/Rule/RuleRepositoryInterface.php
+++ b/app/Repositories/Rule/RuleRepositoryInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * RuleRepositoryInterface.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Repositories/RuleGroup/RuleGroupRepository.php b/app/Repositories/RuleGroup/RuleGroupRepository.php
index 5bdc3a12d4..ccbfe8f98e 100644
--- a/app/Repositories/RuleGroup/RuleGroupRepository.php
+++ b/app/Repositories/RuleGroup/RuleGroupRepository.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Repositories\RuleGroup;
 
diff --git a/app/Repositories/RuleGroup/RuleGroupRepositoryInterface.php b/app/Repositories/RuleGroup/RuleGroupRepositoryInterface.php
index 3eeb10d860..1b20dcd9e8 100644
--- a/app/Repositories/RuleGroup/RuleGroupRepositoryInterface.php
+++ b/app/Repositories/RuleGroup/RuleGroupRepositoryInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Repositories\RuleGroup;
 
diff --git a/app/Repositories/Shared/ComponentRepository.php b/app/Repositories/Shared/ComponentRepository.php
index 391e78f21d..ba285cc1a8 100644
--- a/app/Repositories/Shared/ComponentRepository.php
+++ b/app/Repositories/Shared/ComponentRepository.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Repositories\Shared;
 
diff --git a/app/Repositories/Tag/TagRepository.php b/app/Repositories/Tag/TagRepository.php
index 952090e750..7219ccd890 100644
--- a/app/Repositories/Tag/TagRepository.php
+++ b/app/Repositories/Tag/TagRepository.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Repositories\Tag;
 
diff --git a/app/Repositories/Tag/TagRepositoryInterface.php b/app/Repositories/Tag/TagRepositoryInterface.php
index 35f5c0f83c..77c2d73c8b 100644
--- a/app/Repositories/Tag/TagRepositoryInterface.php
+++ b/app/Repositories/Tag/TagRepositoryInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Repositories\Tag;
 
diff --git a/app/Rules/Actions/ActionInterface.php b/app/Rules/Actions/ActionInterface.php
index 9e7998e854..52a34113cb 100644
--- a/app/Rules/Actions/ActionInterface.php
+++ b/app/Rules/Actions/ActionInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * ActionInterface.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Rules/Actions/AddTag.php b/app/Rules/Actions/AddTag.php
index 23aaa19d52..6f09d42a9e 100644
--- a/app/Rules/Actions/AddTag.php
+++ b/app/Rules/Actions/AddTag.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * AddTag.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Rules/Actions/AppendDescription.php b/app/Rules/Actions/AppendDescription.php
index f64c91ee03..e08a0dbf96 100644
--- a/app/Rules/Actions/AppendDescription.php
+++ b/app/Rules/Actions/AppendDescription.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * AppendDescription.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Rules/Actions/ClearBudget.php b/app/Rules/Actions/ClearBudget.php
index 109bd75d77..6243ce8d06 100644
--- a/app/Rules/Actions/ClearBudget.php
+++ b/app/Rules/Actions/ClearBudget.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * ClearBudget.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Rules/Actions/ClearCategory.php b/app/Rules/Actions/ClearCategory.php
index 9f7a7a1857..c7cb75269d 100644
--- a/app/Rules/Actions/ClearCategory.php
+++ b/app/Rules/Actions/ClearCategory.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * ClearCategory.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Rules/Actions/PrependDescription.php b/app/Rules/Actions/PrependDescription.php
index 97cc5fa1fe..f67febb71e 100644
--- a/app/Rules/Actions/PrependDescription.php
+++ b/app/Rules/Actions/PrependDescription.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * PrependDescription.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Rules/Actions/RemoveAllTags.php b/app/Rules/Actions/RemoveAllTags.php
index 9ac96b68ec..70a3ac7f12 100644
--- a/app/Rules/Actions/RemoveAllTags.php
+++ b/app/Rules/Actions/RemoveAllTags.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * RemoveAllTags.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Rules/Actions/RemoveTag.php b/app/Rules/Actions/RemoveTag.php
index 4c0bb7888c..4e0ee9a600 100644
--- a/app/Rules/Actions/RemoveTag.php
+++ b/app/Rules/Actions/RemoveTag.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * RemoveTag.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Rules/Actions/SetBudget.php b/app/Rules/Actions/SetBudget.php
index 559d4387d8..9e571b5740 100644
--- a/app/Rules/Actions/SetBudget.php
+++ b/app/Rules/Actions/SetBudget.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * SetBudget.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Rules/Actions/SetCategory.php b/app/Rules/Actions/SetCategory.php
index c72bd42f8b..6d56a3251c 100644
--- a/app/Rules/Actions/SetCategory.php
+++ b/app/Rules/Actions/SetCategory.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * SetCategory.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Rules/Actions/SetDescription.php b/app/Rules/Actions/SetDescription.php
index 2a2b81c82a..c088458e00 100644
--- a/app/Rules/Actions/SetDescription.php
+++ b/app/Rules/Actions/SetDescription.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * SetDescription.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Rules/Processor.php b/app/Rules/Processor.php
index 97d237208b..c8c3a3b3cf 100644
--- a/app/Rules/Processor.php
+++ b/app/Rules/Processor.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * Processor.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Rules/Triggers/AmountExactly.php b/app/Rules/Triggers/AmountExactly.php
index 5116dd1694..02045a42f8 100644
--- a/app/Rules/Triggers/AmountExactly.php
+++ b/app/Rules/Triggers/AmountExactly.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * AmountExactly.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Rules/Triggers/AmountLess.php b/app/Rules/Triggers/AmountLess.php
index e358417128..cfad91f24b 100644
--- a/app/Rules/Triggers/AmountLess.php
+++ b/app/Rules/Triggers/AmountLess.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * AmountLess.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Rules/Triggers/AmountMore.php b/app/Rules/Triggers/AmountMore.php
index fb4c12fef1..a7d6711f1f 100644
--- a/app/Rules/Triggers/AmountMore.php
+++ b/app/Rules/Triggers/AmountMore.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * AmountMore.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Rules/Triggers/DescriptionContains.php b/app/Rules/Triggers/DescriptionContains.php
index 26d311422a..4e5fe8428a 100644
--- a/app/Rules/Triggers/DescriptionContains.php
+++ b/app/Rules/Triggers/DescriptionContains.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * DescriptionContains.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Rules/Triggers/DescriptionEnds.php b/app/Rules/Triggers/DescriptionEnds.php
index 83e7ea0fe9..b71009799a 100644
--- a/app/Rules/Triggers/DescriptionEnds.php
+++ b/app/Rules/Triggers/DescriptionEnds.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * DescriptionEnds.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Rules/Triggers/DescriptionIs.php b/app/Rules/Triggers/DescriptionIs.php
index a8fb482eb2..12bc48b697 100644
--- a/app/Rules/Triggers/DescriptionIs.php
+++ b/app/Rules/Triggers/DescriptionIs.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * DescriptionIs.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Rules/Triggers/DescriptionStarts.php b/app/Rules/Triggers/DescriptionStarts.php
index 0f8facd716..9b23e1253c 100644
--- a/app/Rules/Triggers/DescriptionStarts.php
+++ b/app/Rules/Triggers/DescriptionStarts.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * DescriptionStarts.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Rules/Triggers/FromAccountContains.php b/app/Rules/Triggers/FromAccountContains.php
index d9df90d330..05badb6f7b 100644
--- a/app/Rules/Triggers/FromAccountContains.php
+++ b/app/Rules/Triggers/FromAccountContains.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * FromAccountContains.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Rules/Triggers/FromAccountEnds.php b/app/Rules/Triggers/FromAccountEnds.php
index 3836e542fa..e4b144bb87 100644
--- a/app/Rules/Triggers/FromAccountEnds.php
+++ b/app/Rules/Triggers/FromAccountEnds.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * FromAccountEnds.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Rules/Triggers/FromAccountIs.php b/app/Rules/Triggers/FromAccountIs.php
index a9e42667ab..9fb084de93 100644
--- a/app/Rules/Triggers/FromAccountIs.php
+++ b/app/Rules/Triggers/FromAccountIs.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * FromAccountIs.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Rules/Triggers/FromAccountStarts.php b/app/Rules/Triggers/FromAccountStarts.php
index 444a65d0fa..6eea3179f4 100644
--- a/app/Rules/Triggers/FromAccountStarts.php
+++ b/app/Rules/Triggers/FromAccountStarts.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * FromAccountStarts.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Rules/Triggers/ToAccountContains.php b/app/Rules/Triggers/ToAccountContains.php
index 9656896fde..06d081bfac 100644
--- a/app/Rules/Triggers/ToAccountContains.php
+++ b/app/Rules/Triggers/ToAccountContains.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * ToAccountContains.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Rules/Triggers/ToAccountEnds.php b/app/Rules/Triggers/ToAccountEnds.php
index 354c2015d5..5637df0cb6 100644
--- a/app/Rules/Triggers/ToAccountEnds.php
+++ b/app/Rules/Triggers/ToAccountEnds.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * ToAccountEnds.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Rules/Triggers/ToAccountIs.php b/app/Rules/Triggers/ToAccountIs.php
index 1a1ab08b91..1eb9f5623e 100644
--- a/app/Rules/Triggers/ToAccountIs.php
+++ b/app/Rules/Triggers/ToAccountIs.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * ToAccountIs.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Rules/Triggers/ToAccountStarts.php b/app/Rules/Triggers/ToAccountStarts.php
index 52eddebf2d..446a592d29 100644
--- a/app/Rules/Triggers/ToAccountStarts.php
+++ b/app/Rules/Triggers/ToAccountStarts.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * ToAccountStarts.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Rules/Triggers/TransactionType.php b/app/Rules/Triggers/TransactionType.php
index d7aa688d62..1a96720fc8 100644
--- a/app/Rules/Triggers/TransactionType.php
+++ b/app/Rules/Triggers/TransactionType.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * TransactionType.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Rules/Triggers/TriggerInterface.php b/app/Rules/Triggers/TriggerInterface.php
index 17147db9e4..074cacdd40 100644
--- a/app/Rules/Triggers/TriggerInterface.php
+++ b/app/Rules/Triggers/TriggerInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * TriggerInterface.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Rules/Triggers/UserAction.php b/app/Rules/Triggers/UserAction.php
index c1b0d21b74..917f2d8822 100644
--- a/app/Rules/Triggers/UserAction.php
+++ b/app/Rules/Triggers/UserAction.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * UserAction.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Sql/Query.php b/app/Sql/Query.php
index 8abf2376e1..ccc9a6244f 100644
--- a/app/Sql/Query.php
+++ b/app/Sql/Query.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Sql;
 
diff --git a/app/Support/Amount.php b/app/Support/Amount.php
index 8bdabed408..66657f0b0c 100644
--- a/app/Support/Amount.php
+++ b/app/Support/Amount.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Support;
 
diff --git a/app/Support/Binder/AccountList.php b/app/Support/Binder/AccountList.php
index 045275fe18..3028d88f1c 100644
--- a/app/Support/Binder/AccountList.php
+++ b/app/Support/Binder/AccountList.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * AccountList.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Support/Binder/BinderInterface.php b/app/Support/Binder/BinderInterface.php
index 900d47b042..b3b3b1d583 100644
--- a/app/Support/Binder/BinderInterface.php
+++ b/app/Support/Binder/BinderInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * BinderInterface.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Support/Binder/BudgetList.php b/app/Support/Binder/BudgetList.php
index 786106e362..e957adad65 100644
--- a/app/Support/Binder/BudgetList.php
+++ b/app/Support/Binder/BudgetList.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * BudgetList.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Support/Binder/CategoryList.php b/app/Support/Binder/CategoryList.php
index 799ad7b461..a212d302c0 100644
--- a/app/Support/Binder/CategoryList.php
+++ b/app/Support/Binder/CategoryList.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * CategoryList.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Support/Binder/Date.php b/app/Support/Binder/Date.php
index a6c637500b..e910bc07d9 100644
--- a/app/Support/Binder/Date.php
+++ b/app/Support/Binder/Date.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * Date.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Support/CacheProperties.php b/app/Support/CacheProperties.php
index ed0c1f3302..a67389eb2f 100644
--- a/app/Support/CacheProperties.php
+++ b/app/Support/CacheProperties.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Support;
 
diff --git a/app/Support/Domain.php b/app/Support/Domain.php
index 0c4d209b26..c7892278d3 100644
--- a/app/Support/Domain.php
+++ b/app/Support/Domain.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * Domain.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Support/Events/BillScanner.php b/app/Support/Events/BillScanner.php
index 2c1f444f31..3bb3c807ca 100644
--- a/app/Support/Events/BillScanner.php
+++ b/app/Support/Events/BillScanner.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 /**
  * BillScanner.php
  * Copyright (C) 2016 Sander Dorigo
diff --git a/app/Support/ExpandedForm.php b/app/Support/ExpandedForm.php
index 8c82ca64a6..f5559a475f 100644
--- a/app/Support/ExpandedForm.php
+++ b/app/Support/ExpandedForm.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Support;
 
diff --git a/app/Support/Facades/Amount.php b/app/Support/Facades/Amount.php
index 4ef94d5c93..2a9c0d01a0 100644
--- a/app/Support/Facades/Amount.php
+++ b/app/Support/Facades/Amount.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Support\Facades;
 
diff --git a/app/Support/Facades/ExpandedForm.php b/app/Support/Facades/ExpandedForm.php
index 5cd1973d77..2fe33eedb1 100644
--- a/app/Support/Facades/ExpandedForm.php
+++ b/app/Support/Facades/ExpandedForm.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Support\Facades;
 
diff --git a/app/Support/Facades/Navigation.php b/app/Support/Facades/Navigation.php
index 9adefb8cc9..cfbc44188d 100644
--- a/app/Support/Facades/Navigation.php
+++ b/app/Support/Facades/Navigation.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Support\Facades;
 
diff --git a/app/Support/Facades/Preferences.php b/app/Support/Facades/Preferences.php
index 14cd12b528..9b406b97f7 100644
--- a/app/Support/Facades/Preferences.php
+++ b/app/Support/Facades/Preferences.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Support\Facades;
 
diff --git a/app/Support/Facades/Steam.php b/app/Support/Facades/Steam.php
index 986aa30ccf..69655ac55b 100644
--- a/app/Support/Facades/Steam.php
+++ b/app/Support/Facades/Steam.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Support\Facades;
 
diff --git a/app/Support/Migration/TestData.php b/app/Support/Migration/TestData.php
index 12af5e7f33..341c192c89 100644
--- a/app/Support/Migration/TestData.php
+++ b/app/Support/Migration/TestData.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 namespace FireflyIII\Support\Migration;
 
 /**
diff --git a/app/Support/Navigation.php b/app/Support/Navigation.php
index 721a84507c..cdd33682ea 100644
--- a/app/Support/Navigation.php
+++ b/app/Support/Navigation.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Support;
 
diff --git a/app/Support/Preferences.php b/app/Support/Preferences.php
index 531eb3e0ad..cba289fe9c 100644
--- a/app/Support/Preferences.php
+++ b/app/Support/Preferences.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Support;
 
diff --git a/app/Support/Search/Search.php b/app/Support/Search/Search.php
index bb2f126bbb..d4fc3783ab 100644
--- a/app/Support/Search/Search.php
+++ b/app/Support/Search/Search.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Support\Search;
 
diff --git a/app/Support/Search/SearchInterface.php b/app/Support/Search/SearchInterface.php
index 431275e8fe..ea862d5060 100644
--- a/app/Support/Search/SearchInterface.php
+++ b/app/Support/Search/SearchInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Support\Search;
 
diff --git a/app/Support/Steam.php b/app/Support/Steam.php
index 0358e07abd..7431f715a7 100644
--- a/app/Support/Steam.php
+++ b/app/Support/Steam.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Support;
 
diff --git a/app/Support/Twig/Budget.php b/app/Support/Twig/Budget.php
index a67313513c..938cabb929 100644
--- a/app/Support/Twig/Budget.php
+++ b/app/Support/Twig/Budget.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Support\Twig;
 
diff --git a/app/Support/Twig/General.php b/app/Support/Twig/General.php
index 9e0ca7d4e7..d9e01f9e64 100644
--- a/app/Support/Twig/General.php
+++ b/app/Support/Twig/General.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Support\Twig;
 
diff --git a/app/Support/Twig/Journal.php b/app/Support/Twig/Journal.php
index 29b9c2d31f..9962c16ac1 100644
--- a/app/Support/Twig/Journal.php
+++ b/app/Support/Twig/Journal.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Support\Twig;
 
diff --git a/app/Support/Twig/PiggyBank.php b/app/Support/Twig/PiggyBank.php
index 9ea1ff759b..dd5d341ffa 100644
--- a/app/Support/Twig/PiggyBank.php
+++ b/app/Support/Twig/PiggyBank.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Support\Twig;
 
diff --git a/app/Support/Twig/Rule.php b/app/Support/Twig/Rule.php
index 090f1e2473..8c83e2ca10 100644
--- a/app/Support/Twig/Rule.php
+++ b/app/Support/Twig/Rule.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Support\Twig;
 
diff --git a/app/Support/Twig/Translation.php b/app/Support/Twig/Translation.php
index 378ba786e6..028cc814a1 100644
--- a/app/Support/Twig/Translation.php
+++ b/app/Support/Twig/Translation.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Support\Twig;
 
diff --git a/app/User.php b/app/User.php
index 3019d258ff..917ea694a0 100644
--- a/app/User.php
+++ b/app/User.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII;
 
diff --git a/app/Validation/FireflyValidator.php b/app/Validation/FireflyValidator.php
index 4e18f0fa50..b640d8a6fc 100644
--- a/app/Validation/FireflyValidator.php
+++ b/app/Validation/FireflyValidator.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace FireflyIII\Validation;