diff --git a/index.js b/index.cjs
similarity index 100%
rename from index.js
rename to index.cjs
diff --git a/package.json b/package.json
index 70f93ca..9ae667c 100644
--- a/package.json
+++ b/package.json
@@ -2,11 +2,11 @@
   "name": "discours-editing-server",
   "version": "1.0.2",
   "description": "discours.io webrtc p2p network helping crdt-server",
-  "main": "index.js",
+  "main": "index.cjs",
   "type": "module",
   "scripts": {
     "fix": "npx @biomejs/biome check --apply-unsafe .",
-    "start": "node ./index.js"
+    "start": "node ./index.cjs"
   },
   "repository": {
     "type": "git",