diff --git a/.eslintrc.json b/.eslintrc.json
index 12867b6..01db70f 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -113,7 +113,7 @@
 
         // "init-declarations": [ "error", "always" ],
         // "no-catch-shadow": "warn",
-        // "no-delete-var": "error",
+        "no-delete-var": "error",
         // "no-label-var": "error",
         // "no-shadow-restricted-names": "error",
         // "no-shadow": "warn",