diff --git a/package.json b/package.json
index 7b846b5..de8fdb0 100644
--- a/package.json
+++ b/package.json
@@ -20,6 +20,10 @@
     "test": "testem ci && jshint lib tests && jscs lib tests",
     "test:dev": "testem"
   },
+  "files": [
+    "index.js",
+    "lib"
+  ],
   "author": "",
   "license": "MIT",
   "bugs": {