diff --git a/package.json b/package.json
index 890e4ac..e4a83f9 100644
--- a/package.json
+++ b/package.json
@@ -21,16 +21,11 @@
     "ms": "0.7.2"
   },
   "devDependencies": {
-    "babel": "^6.5.2",
-    "babel-eslint": "^7.1.1",
-    "babel-polyfill": "^6.20.0",
-    "babel-preset-es2015": "^6.18.0",
-    "babel-register": "^6.18.0",
-    "babel-runtime": "^6.20.0",
     "browserify": "9.0.3",
     "chai": "^3.5.0",
     "eslint": "^3.12.1",
     "eslint-plugin-babel": "^4.0.0",
+    "karma": "^1.3.0",
     "mocha": "^3.2.0",
     "sinon": "^1.17.6"
   },