diff --git a/bower.json b/bower.json
index d44ba0c..ea94643 100644
--- a/bower.json
+++ b/bower.json
@@ -2,8 +2,8 @@
   "name": "core-iconset",
   "private": true,
   "dependencies": {
-    "polymer": "Polymer/polymer#master",
-    "core-meta": "Polymer/core-meta#master",
-    "core-icon": "Polymer/core-icon#master"
+    "polymer": "Polymer/polymer#>=0.4.0 <1.0.0",
+    "core-meta": "Polymer/core-meta#>=0.4.0 <1.0.0",
+    "core-icon": "Polymer/core-icon#>=0.4.0 <1.0.0"
   }
-}
+}
\ No newline at end of file