diff --git a/bower.json b/bower.json
index 1ef2fee..c4322d4 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "core-input",
   "dependencies": {
-    "polymer": "Polymer/polymer#master"
+    "polymer": "Polymer/polymer#^0.4.0"
   }
 }
\ No newline at end of file