diff --git a/assets/js/script.js b/assets/js/script.js
index 6439a82..776e17e 100644
--- a/assets/js/script.js
+++ b/assets/js/script.js
@@ -50,8 +50,8 @@ for (let i = 0; i < testimonialsItem.length; i++) {
 }
 
 // add click event to modal close button
-modalCloseBtn.addEventListener("click", testimonialsModalFunc);
-overlay.addEventListener("click", testimonialsModalFunc);
+if (modalCloseBtn) modalCloseBtn.addEventListener("click", testimonialsModalFunc);
+if (overlay) overlay.addEventListener("click", testimonialsModalFunc);