diff --git a/Nullify/examples/solution/scripts/main.js b/Nullify/examples/solution/scripts/main.js
index 95fab5d..c239c13 100644
--- a/Nullify/examples/solution/scripts/main.js
+++ b/Nullify/examples/solution/scripts/main.js
@@ -1,7 +1,7 @@
-var nElement = 0;
-var nTimes = 100000;
+let nElement = 0;
+let nTimes = 100000;
 function createElement() {
-  var div = document.createElement("div");
+  let div = document.createElement("div");
   div.onclick = function () {};
   div = null;
 }