diff --git a/package.json b/package.json
index a035516a..fb13d922 100644
--- a/package.json
+++ b/package.json
@@ -20,6 +20,13 @@
     "heroku"
   ],
   "main": "./lib/cors-anywhere.js",
+  "files": [
+    "lib/",
+    "test/",
+    "Procfile",
+    "demo.html",
+    "server.js"
+  ],
   "dependencies": {
     "http-proxy": "1.11.1",
     "proxy-from-env": "0.0.1"