diff --git a/web/dart/reorganize_html.dart b/web/dart/reorganize_html.dart
index b48d8dd..6390231 100644
--- a/web/dart/reorganize_html.dart
+++ b/web/dart/reorganize_html.dart
@@ -3,7 +3,7 @@ import 'dart:html'
 
 import './navbar.dart' show makeNavbar;
 
-const image_header = '/img/icon.png';
+const image_header = '/img/icon.webp';
 
 Future<Element> makeHeader() async {
   var header = Element.tag('header');