diff --git a/bower.json b/bower.json
index cb1beca..e891af6 100644
--- a/bower.json
+++ b/bower.json
@@ -2,9 +2,10 @@
   "name": "core-collapse",
   "private": true,
   "dependencies": {
-    "polymer": "Polymer/polymer#master"
+    "polymer": "Polymer/polymer#^0.5.0"
   },
   "devDependencies": {
     "web-component-tester": "Polymer/web-component-tester#^1.1.0"
-  }
+  },
+  "version": "0.5.1"
 }
\ No newline at end of file