diff --git a/.eslintrc.json b/.eslintrc.json
index 685b1c7..ce6a96c 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -15,7 +15,7 @@
   ],
   "plugins": ["import"],
   "parserOptions": {
-    "ecmaVersion": 2021
+    "ecmaVersion": 2022
   },
   "settings": {
     "jest": {
diff --git a/package.json b/package.json
index 2c527c3..bfb31f3 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
   "private": true,
   "scripts": {
     "check": "npm-run-all --parallel check:*",
-    "check:lint": "eslint --no-eslintrc --config=.eslintrc.json **/*.js",
+    "check:lint": "eslint --no-eslintrc --config=.eslintrc.json **/*.{js,mjs}",
     "check:prettier": "prettier --check **/*.{js,json,md}",
     "ci": "npm-run-all check test",
     "postinstall": "lerna bootstrap",