diff --git a/static/build.html b/static/build.html
index 91abd650..e0e86444 100644
--- a/static/build.html
+++ b/static/build.html
@@ -1225,6 +1225,9 @@ rm android-cts-media-1.5.zip</pre>
         "semi": [
             "error",
             "always"
+        ],
+        "no-var": [
+            "error"
         ]
     }
 }</pre>