diff --git a/_sass/layout/doc-navigation.scss b/_sass/layout/doc-navigation.scss
index 7fa75f5d6a..7539881c3f 100644
--- a/_sass/layout/doc-navigation.scss
+++ b/_sass/layout/doc-navigation.scss
@@ -65,7 +65,7 @@ $nav-height: 46px;
               position: absolute;
               margin-top: 10px;
               display: none;
-              z-index: 1;
+              z-index: 40;
               box-shadow: 0 3px 12px rgba(0, 0, 0, 0.15);
 
               @include bp(medium) {