diff --git a/public/illust_111261733_20231222_212212-min.webp b/public/illust_111261733_20231222_212212-min.webp
new file mode 100644
index 0000000..f8766e4
Binary files /dev/null and b/public/illust_111261733_20231222_212212-min.webp differ
diff --git a/src/styles/globals.css b/src/styles/globals.css
index 31a9d11..be84c19 100644
--- a/src/styles/globals.css
+++ b/src/styles/globals.css
@@ -3,7 +3,7 @@
 @tailwind utilities;
 
 html {
-  --background-image: url("/illust_111261733_20231222_212212.jpg");
+  --background-image: url("/illust_111261733_20231222_212212-min.webp");
   background-image: var(--background-image);
   background-repeat: no-repeat;
   background-attachment: fixed;