diff --git a/bower.json b/bower.json
index 3f57dc2..b994821 100644
--- a/bower.json
+++ b/bower.json
@@ -2,7 +2,7 @@
   "name": "core-transition",
   "private": true,
   "dependencies": {
-    "polymer": "Polymer/polymer#master",
-    "core-meta": "Polymer/core-meta#master"
+    "polymer": "Polymer/polymer#>=0.3.0 <1.0.0",
+    "core-meta": "Polymer/core-meta#>=0.3.0 <1.0.0"
   }
 }
\ No newline at end of file