diff --git a/build/media_source/vendor/bootstrap/js/modal.es6.js b/build/media_source/vendor/bootstrap/js/modal.es6.js
index 805b51d8686b9..533a110c20e58 100644
--- a/build/media_source/vendor/bootstrap/js/modal.es6.js
+++ b/build/media_source/vendor/bootstrap/js/modal.es6.js
@@ -6,7 +6,7 @@ window.bootstrap = window.bootstrap || {};
 window.bootstrap.Modal = Modal;
 
 const allowed = {
-  iframe: ['src', 'name', 'width', 'height'],
+  iframe: ['src', 'name', 'title', 'width', 'height'],
 };
 
 Joomla.initialiseModal = (modal, options) => {