diff --git a/lib/wheat/tools.js b/lib/wheat/tools.js
index 5fda465..4205af1 100644
--- a/lib/wheat/tools.js
+++ b/lib/wheat/tools.js
@@ -28,7 +28,7 @@ var Helpers = {
     size = size || 200;
     var hash = Crypto.createHash('md5')
     hash.update((email+"").trim().toLowerCase())
-    return "http://www.gravatar.com/avatar/" +
+    return "//www.gravatar.com/avatar/" +
       hash.digest('hex') +
       "?r=pg&s=" + size + ".jpg&d=identicon";
   },