diff --git a/private/js/cms.tiptap.js b/private/js/cms.tiptap.js
index b26dc43..215c8a4 100644
--- a/private/js/cms.tiptap.js
+++ b/private/js/cms.tiptap.js
@@ -122,7 +122,7 @@ class CMSTipTapPlugin {
                 save_callback: save_callback,
                 settings: settings,
             });
-            el.addEventListener('focusout', ({editor, event}) => {
+            editor.on('blur', ({editor, event}) => {
                 this._blurEditor(editor, event);
             });
             editor.on('update', ({editor}) => {
diff --git a/private/js/tiptap_plugins/cms.styles.js b/private/js/tiptap_plugins/cms.styles.js
index e81da2c..44677fd 100644
--- a/private/js/tiptap_plugins/cms.styles.js
+++ b/private/js/tiptap_plugins/cms.styles.js
@@ -5,16 +5,16 @@
 
 import {Mark, mergeAttributes,} from '@tiptap/core';
 
+'use strict';
+
 
 const _markElement = {
     addOptions() {
-        'use strict';
         return {
             HTMLAttributes: {},
         };
     },
     parseHTML() {
-        'use strict';
         return [
             {
                 tag: this.name.toLowerCase()
@@ -22,7 +22,6 @@ const _markElement = {
         ];
     },
     renderHTML({ HTMLAttributes }) {
-        'use strict';
         return [this.name.toLowerCase(), mergeAttributes(this.options.HTMLAttributes, HTMLAttributes), 0];
     },
     addCommands() {