diff --git a/.eslintrc.json b/.eslintrc.json
index 743bf6c6..97ac8e54 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -24,6 +24,9 @@
         "semi": [
             "error",
             "always"
+        ],
+        "no-var": [
+            "error"
         ]
     }
 }