diff --git a/.eslintrc.json b/.eslintrc.json
index 1879aed..c26b549 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -7,8 +7,10 @@
   "extends": ["eslint:recommended", "plugin:prettier/recommended"],
   "rules": {
     "prettier/prettier": "error",
-    "no-console": "warn",
-    "no-unused-vars": "off"
+    "no-console": "warn"
+  },
+  "parserOptions": {
+    "ecmaVersion": 8
   },
   "plugins": ["prettier"],
   "overrides": [