diff --git a/modules/default/calendar/calendarfetcher.js b/modules/default/calendar/calendarfetcher.js
index 6c268c46..d4aa7b02 100644
--- a/modules/default/calendar/calendarfetcher.js
+++ b/modules/default/calendar/calendarfetcher.js
@@ -50,6 +50,13 @@ const CalendarFetcher = function (url, reloadInterval, excludedEvents, maximumEn
 			},
 			gzip: true
 		};
+		
+		if (selfSignedCert) {
+			var agentOptions = {
+				rejectUnauthorized: false
+			};
+            opts.agentOptions = agentOptions;
+		}
 
 		if (auth) {
 			if (auth.method === "bearer") {