diff --git a/static/static/css/index.scss b/static/static/css/index.scss
index 74970c4..8eb7c5c 100644
--- a/static/static/css/index.scss
+++ b/static/static/css/index.scss
@@ -4,7 +4,7 @@
     header {
         width: 100%;
         height: 75vh;
-        background-image: url('https://kakigoori.dev/c152e805-b859-4ad0-817c-4d671e5f15ad/auto');
+        background-image: url('https://kakigoori.dev/c152e805-b859-4ad0-817c-4d671e5f15ad/width/2560/auto');
         background-size: cover;
         background-position: center bottom;
         position: relative;
diff --git a/static/static/css/style.css b/static/static/css/style.css
index cd08941..46ab761 100644
--- a/static/static/css/style.css
+++ b/static/static/css/style.css
@@ -131,7 +131,7 @@ body {
 .page-index header {
   width: 100%;
   height: 75vh;
-  background-image: url("https://kakigoori.dev/c152e805-b859-4ad0-817c-4d671e5f15ad/auto");
+  background-image: url("https://kakigoori.dev/c152e805-b859-4ad0-817c-4d671e5f15ad/width/2560/auto");
   background-size: cover;
   background-position: center bottom;
   position: relative;