diff --git a/app/Import/Storage/ImportArrayStorage.php b/app/Import/Storage/ImportArrayStorage.php
index 9568c31f32..9cc5ab6871 100644
--- a/app/Import/Storage/ImportArrayStorage.php
+++ b/app/Import/Storage/ImportArrayStorage.php
@@ -116,7 +116,7 @@ class ImportArrayStorage
         app('preferences')->mark();
 
         // email about this:
-        event(new RequestedReportOnJournals($this->importJob->user_id, $collection));
+        event(new RequestedReportOnJournals((int)$this->importJob->user_id, $collection));
 
         return $collection;
     }
diff --git a/app/Models/ImportJob.php b/app/Models/ImportJob.php
index aebbf35b45..82de695919 100644
--- a/app/Models/ImportJob.php
+++ b/app/Models/ImportJob.php
@@ -56,6 +56,7 @@ class ImportJob extends Model
      */
     protected $casts
         = [
+            'user_id'         => 'int',
             'created_at'      => 'datetime',
             'updated_at'      => 'datetime',
             'configuration'   => 'array',