diff --git a/icsFormatter.js b/icsFormatter.js
index c66d7a8..0c54881 100644
--- a/icsFormatter.js
+++ b/icsFormatter.js
@@ -109,7 +109,7 @@ var icsFormatter = function() {
             ext = (typeof ext !== 'undefined') ? ext : '.ics';
             filename = (typeof filename !== 'undefined') ? filename : 'calendar';
             var calendar = calendarStart + SEPARATOR + calendarEvents.join(SEPARATOR) + calendarEnd;
-            window.open( "data:text/calendar;charset=utf8," + escape(calendar));
+            window.open( "data:text/calendar;charset=utf8," + encodeURIComponent(calendar));
         }
     };
 };