diff --git a/public/javascripts/embed.js b/public/javascripts/embed.js
index 3d2f9838b55..2bfcc51966a 100644
--- a/public/javascripts/embed.js
+++ b/public/javascripts/embed.js
@@ -72,7 +72,7 @@
   }
 
   function normalizeUrl(url) {
-    return url.toLowerCase().replace(/^https?(\:\/\/)?/, '');
+    return url.replace(/^https?(\:\/\/)?/, '');
   }
 
   function postMessageReceived(e) {