diff --git a/index.js b/index.cjs
similarity index 98%
rename from index.js
rename to index.cjs
index 325297e..05aa9b1 100644
--- a/index.js
+++ b/index.cjs
@@ -1,4 +1,4 @@
-const config = {
+module.exports = {
   extends: [
     'xo-react',
     'plugin:@next/next/recommended',
@@ -100,5 +100,3 @@ const config = {
     'unicorn/prefer-module': 'off',
   },
 }
-
-export default config
diff --git a/lib/lint-fixture.js b/lib/lint-fixture.js
index 36ce085..4437633 100644
--- a/lib/lint-fixture.js
+++ b/lib/lint-fixture.js
@@ -1,7 +1,7 @@
 import path from 'node:path'
 import xo from 'xo'
 
-import config from '..'
+import config from '../index.cjs'
 
 const fixturesPath = path.join('__tests__', '__fixtures__')
 
diff --git a/package.json b/package.json
index 330d2a4..5fa1514 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "eslint-config-xo-nextjs",
   "version": "4.0.0",
   "description": "ESLint shareable config for Next.js to be used with eslint-config-xo",
-  "main": "index.js",
+  "main": "index.cjs",
   "repository": "git@github.com:tusbar/eslint-config-xo-nextjs.git",
   "author": "Bertrand Marron",
   "license": "MIT",
@@ -14,7 +14,7 @@
     "test": "NODE_OPTIONS=--experimental-vm-modules jest"
   },
   "files": [
-    "index.js"
+    "index.cjs"
   ],
   "keywords": [
     "react",