diff --git a/utilities/javascript/binarySearch.js b/utilities/javascript/binarySearch.js
index 5861eec7..8a656af0 100644
--- a/utilities/javascript/binarySearch.js
+++ b/utilities/javascript/binarySearch.js
@@ -2,7 +2,7 @@ function binarySearch(arr, target) {
     let left = 0;
     let right = arr.length - 1;
     while (left <= right) {
-        let mid = left + Math.floor((right - left) / 2);
+        const mid = left + Math.floor((right - left) / 2);
         if (arr[mid] === target) {
             return mid;
         }