diff --git a/package.json b/package.json
index bf475e46..842c2fd1 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,7 @@
     "object-assign": "^3.0.0"
   },
   "peerDependencies": {
-    "babel-core": "*",
+    "babel-core": "^5.0.0",
     "webpack": "*"
   },
   "devDependencies": {