diff --git a/lib/ace/css/editor.css b/lib/ace/css/editor.css
index ace961aeefc..4832142050e 100644
--- a/lib/ace/css/editor.css
+++ b/lib/ace/css/editor.css
@@ -1,4 +1,4 @@
-@import url(http://fonts.googleapis.com/css?family=Droid+Sans+Mono);
+@import url(//fonts.googleapis.com/css?family=Droid+Sans+Mono);
 
 
 .ace_editor {