diff --git a/backend-socket.io/package.json b/backend-socket.io/package.json
index bbb52e68c8c219559736cc047301625d90c4c273..f3fa87e3b5cfc600dbf34db025c621fe9d265211 100644
--- a/backend-socket.io/package.json
+++ b/backend-socket.io/package.json
@@ -1,4 +1,5 @@
 {
+  "type": "module",
   "dependencies": {
     "express": "^4.17.3",
     "socket.io": "^4.4.1"