diff --git a/package.json b/package.json
index 12597ae..112c0db 100644
--- a/package.json
+++ b/package.json
@@ -44,7 +44,7 @@
   },
   "peerDependencies": {
     "grunt": "0.4.x",
-    "karma": "~0.12.0"
+    "karma": "^0.12 || >= 0.13.0-rc.0"
   },
   "contributors": [
     "dignifiedquire <friedel.ziegelmayer@gmail.com>",