diff --git a/package.json b/package.json
index 2bdc4ac..328989b 100644
--- a/package.json
+++ b/package.json
@@ -23,6 +23,7 @@
     "semantic-release": "semantic-release"
   },
   "main": "lib/index.js",
+  "files": ["lib"],
   "typings": "lib/index.d.ts",
   "engine": {
     "node": ">=4"