diff --git a/src/html/component/undo-redo/undo-redo.ts b/src/html/component/undo-redo/undo-redo.ts
index 24ddfef..dd67bb6 100644
--- a/src/html/component/undo-redo/undo-redo.ts
+++ b/src/html/component/undo-redo/undo-redo.ts
@@ -1,5 +1,5 @@
 import { html, css, unsafeCSS, LitElement, type TemplateResult } from 'lit'
-import { customElement, property, state } from 'lit/decorators.js'
+import { customElement, state } from 'lit/decorators.js'
 import style_less from './undo-redo.less?inline'
 import { faArrowLeft, faArrowRight } from '@fortawesome/free-solid-svg-icons'
 import { findIconDefinition, icon, library } from '@fortawesome/fontawesome-svg-core'
diff --git a/src/html/sketch-editor.html b/src/html/sketch-editor.html
index f9b8e37..1330cca 100644
--- a/src/html/sketch-editor.html
+++ b/src/html/sketch-editor.html
@@ -1,6 +1,6 @@
 <extends src="window.html">
     <block name="window">
         <script type="module" src="./component/root-component/root-component.ts"></script>
-        <root-component></root-component>        
+        <root-component></root-component>
     </block>
 </extends>
\ No newline at end of file