diff --git a/bower.json b/bower.json
index a47fbc7..583069e 100644
--- a/bower.json
+++ b/bower.json
@@ -2,6 +2,6 @@
   "name": "core-layout-grid",
   "private": true,
   "dependencies": {
-    "polymer": "Polymer/polymer#master"
+    "polymer": "Polymer/polymer#^0.4.0"
   }
 }
\ No newline at end of file