diff --git a/themes/hugo-theme-flat/layouts/partials/head.html b/themes/hugo-theme-flat/layouts/partials/head.html
index e346cac..3adda35 100644
--- a/themes/hugo-theme-flat/layouts/partials/head.html
+++ b/themes/hugo-theme-flat/layouts/partials/head.html
@@ -88,6 +88,10 @@
 <link rel="preload" as="style" href="{{ "css/syntax.css" | relURL }}" />
 <link rel="preload" as="style" href="{{ "css/style.css" | relURL }}" />
 
+<link rel="preload" as="image" href="{{ "img/banner.jpg" | relURL }}" />
+<link rel="preload" as="image" href="{{ "img/banner_open.jpg" | relURL }}" />
+<link rel="preload" as="image" href="{{ "doorstatus/open.png" | relURL }}" />
+<link rel="preload" as="image" href="{{ "doorstatus/closed" | relURL }}" />
 
 
 <link rel="preload" as="script" href="/js/jquery-3.7.1.min.js" />