diff --git a/package.json b/package.json
index e15ee03..d2312cc 100644
--- a/package.json
+++ b/package.json
@@ -13,6 +13,9 @@
     "lint",
     "test"
   ],
+  "files": [
+    "reusify.js"
+  ],
   "repository": {
     "type": "git",
     "url": "git+https://github.com/mcollina/reusify.git"