diff --git a/bower.json b/bower.json
index 9d17374..d92d5f2 100644
--- a/bower.json
+++ b/bower.json
@@ -2,9 +2,9 @@
   "name": "paper-dialog",
   "private": true,
   "dependencies": {
-    "polymer": "Polymer/polymer#master",
-    "core-overlay": "Polymer/core-overlay#master",
-    "core-transition": "Polymer/core-transition#master",
-    "paper-shadow": "Polymer/paper-shadow#master"
+    "polymer": "Polymer/polymer#^0.4.0",
+    "core-overlay": "Polymer/core-overlay#^0.4.0",
+    "core-transition": "Polymer/core-transition#^0.4.0",
+    "paper-shadow": "Polymer/paper-shadow#^0.4.0"
   }
-}
+}
\ No newline at end of file