diff --git a/routes/avatars.js b/routes/avatars.js
index 042fc53..241e046 100644
--- a/routes/avatars.js
+++ b/routes/avatars.js
@@ -16,7 +16,7 @@ var human_status = {
 /* GET avatar request. */
 router.get("/:uuid.:ext?", function(req, res) {
   var uuid = req.params.uuid;
-  var size = req.query.size || config.default_size;
+  var size = parseInt(req.query.size) || config.default_size;
   var def = req.query.default;
   var helm = req.query.hasOwnProperty("helm");
   var start = new Date();