diff --git a/src/styles/box/header.scss b/src/styles/box/header.scss
index 03a2dca8d9..34580f541f 100644
--- a/src/styles/box/header.scss
+++ b/src/styles/box/header.scss
@@ -1,6 +1,6 @@
 .header {
   position: relative;
-  width: 1024px;
+  width: 100%;
   height: 60px;
   display: flex;
   justify-content: space-between;
@@ -97,6 +97,6 @@
   }
 
   @media (min-width: 1200px) {
-    width: 1200px;
+    width: 100%;
   }
 }