diff --git a/package.json b/package.json
index 492c1b4..88afcc7 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "@cyberlab/cyber-app-sdk",
   "version": "0.0.0-development",
   "description": "",
-  "main": "index.js",
+  "main": "index.mjs",
   "types": "./dist/index.d.mts",
   "module": "./dist/index.mjs",
   "files": [