diff --git a/static/src/scss/style.scss b/static/src/scss/style.scss
index fb542ef..e8d42c0 100644
--- a/static/src/scss/style.scss
+++ b/static/src/scss/style.scss
@@ -26,6 +26,7 @@ ul.actions {
 #banner {
   background-attachment: fixed;
   background-image: url("../img/header.jpg");
+  background-size: 100%;
 }
 
 pre code {