diff --git a/web/themes/custom/geofresco/dist/js/responsive-iframes.js b/web/themes/custom/geofresco/dist/js/responsive-iframes.js
index 6443dca..7b27b84 100644
--- a/web/themes/custom/geofresco/dist/js/responsive-iframes.js
+++ b/web/themes/custom/geofresco/dist/js/responsive-iframes.js
@@ -4,6 +4,9 @@
 // @TODO Or, best, write a text formatter that does the below and assigns the
 // appropriate class, for example .embed-responsive-4by3
 
+(function ($) {
+  'use strict';
+
 // Find all iframes
 var $iframes = $( "iframe" );
 
@@ -25,3 +28,5 @@ $( window ).resize( function () {
   });
 // Resize to fix all iframes on page load.
 }).resize();
+
+})(jQuery);