diff --git a/1-js/06-advanced-functions/06-function-object/5-sum-many-brackets/solution.md b/1-js/06-advanced-functions/06-function-object/5-sum-many-brackets/solution.md
index 5c932691..981da23c 100644
--- a/1-js/06-advanced-functions/06-function-object/5-sum-many-brackets/solution.md
+++ b/1-js/06-advanced-functions/06-function-object/5-sum-many-brackets/solution.md
@@ -5,7 +5,7 @@
 
 Now the code:
 
-```js run
+```js demo run
 function sum(a) {
 
   let currentSum = a;