diff --git a/package.json b/package.json
index c6cbe254..dcf248ac 100644
--- a/package.json
+++ b/package.json
@@ -1,5 +1,6 @@
 {
   "name": "http-proxy-middleware",
+  "type": "commonjs",
   "version": "3.0.1-beta.1",
   "description": "The one-liner node.js proxy middleware for connect, express, next.js and more",
   "main": "dist/index.js",