diff --git a/modules/20-functions/30-void/index.ts b/modules/20-functions/30-void/index.ts
index 6da0652..f44c1bd 100644
--- a/modules/20-functions/30-void/index.ts
+++ b/modules/20-functions/30-void/index.ts
@@ -4,7 +4,9 @@ function forEach(
   numbers: number[],
   callback: (n: number, index: number) => void,
 ): void {
-  numbers.forEach((n, index) => callback(n, index));
+    for (let i = 0; i < numbers.length; i++) {
+        callback(numbers[i], i);
+    }
 }
 // END