diff --git a/package.json b/package.json
index 1222c7e..5980ada 100644
--- a/package.json
+++ b/package.json
@@ -63,7 +63,8 @@
   },
   "files": [
     "index.js",
-    "lib"
+    "lib",
+    "scripts/postinstall.js"
   ],
   "lint-staged": {
     "**/*.js": [