diff --git a/src/mami.css/setting.css b/src/mami.css/setting.css
index df40e37..4acc208 100644
--- a/src/mami.css/setting.css
+++ b/src/mami.css/setting.css
@@ -10,6 +10,7 @@ select {
     text-align: right;
     position: sticky;
     top: 0;
+    z-index: 1;
 }
 
 .setting__container {