diff --git a/Gruntfile.js b/Gruntfile.js
index 6df6a1ba..dbeef3c1 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -20,9 +20,9 @@ var indexTemplate = _.template(indexFile);
  */
 
 var prodDependencies = [
-  '<script src="//cdnjs.cloudflare.com/ajax/libs/es5-shim/4.1.1/es5-shim.min.js"></script>',
-  '<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/1.8.0/jquery.min.js"></script>',
-  '<script src="//cdnjs.cloudflare.com/ajax/libs/raphael/2.1.0/raphael-min.js"></script>'
+  '<script src="https://cdnjs.cloudflare.com/ajax/libs/es5-shim/4.1.1/es5-shim.min.js"></script>',
+  '<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.8.0/jquery.min.js"></script>',
+  '<script src="https://cdnjs.cloudflare.com/ajax/libs/raphael/2.1.0/raphael-min.js"></script>'
 ];
 
 var devDependencies = [