diff --git a/bower.json b/bower.json
index 66093f7..8a04e1f 100644
--- a/bower.json
+++ b/bower.json
@@ -2,9 +2,9 @@
   "name": "core-animated-pages",
   "private": true,
   "dependencies": {
-    "polymer": "Polymer/polymer#master",
-    "core-selector": "Polymer/core-selector#master",
-    "core-style": "Polymer/core-style#master",
-    "core-transition": "Polymer/core-transition#master"
+    "polymer": "Polymer/polymer#>=0.4.0 <1.0.0",
+    "core-selector": "Polymer/core-selector#>=0.4.0 <1.0.0",
+    "core-style": "Polymer/core-style#>=0.4.0 <1.0.0",
+    "core-transition": "Polymer/core-transition#>=0.4.0 <1.0.0"
   }
 }
\ No newline at end of file