diff --git a/app/assets/stylesheets/components/_contents-list-with-body.scss b/app/assets/stylesheets/components/_contents-list-with-body.scss
index 6e1226f68..5560aaef1 100644
--- a/app/assets/stylesheets/components/_contents-list-with-body.scss
+++ b/app/assets/stylesheets/components/_contents-list-with-body.scss
@@ -29,7 +29,7 @@
   padding-left: 0;
   position: fixed;
   width: 100%;
-  z-index: 1;
+  z-index: 10;
 
   @include govuk-media-query($from: tablet) {
     padding-left: govuk-spacing(2);