diff --git a/package.json b/package.json
index b7a78a7..0222326 100644
--- a/package.json
+++ b/package.json
@@ -19,6 +19,9 @@
   "author": "yuanchuan <yuanchuan23@gmail.com> (http://yuanchuan.name)",
   "main": "./lib/watch",
   "types": "./lib/watch.d.ts",
+  "files": [
+    "lib/"
+  ],
   "homepage": "https://github.com/yuanchuan/node-watch#readme",
   "scripts": {
     "test": "mocha test/test.js --exit --slow 500"