diff --git a/assets/styles/main.scss b/assets/styles/main.scss
index c518c5cfa..e44241d88 100644
--- a/assets/styles/main.scss
+++ b/assets/styles/main.scss
@@ -75,4 +75,7 @@ blockquote {
 }
 .main-navigation {
   box-shadow: $box-shadow-base;
+  position: fixed;
+  width: 100%;
+  z-index: 10;
 }