diff --git a/06-sum/index.js b/06-sum/index.js
index d71f726..971a2ea 100644
--- a/06-sum/index.js
+++ b/06-sum/index.js
@@ -1,7 +1,7 @@
 export function sum(values) {
   // implementar logica aqui
-  var sum = 0;
-    for(var i = 0; i < values.length; i++) {
+  let sum = 0;
+    for(let i = 0; i < values.length; i++) {
         sum += values[i];
     }