diff --git a/.eslintrc.json b/.eslintrc.json
index 0d2c295..3afa231 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -8,5 +8,8 @@
   },
   "parserOptions": {
     "ecmaVersion": 2017
+  },
+  "rules": {
+    "no-shadow": "error"
   }
 }