diff --git a/scss/layout/_layout.scss b/scss/layout/_layout.scss
index 58319081..b87ae6a3 100644
--- a/scss/layout/_layout.scss
+++ b/scss/layout/_layout.scss
@@ -309,6 +309,7 @@ body {
                 overflow: visible;
                 position: relative;
                 top: 0;
+                z-index: 15;
                 width: $Layout-aside--folded-width - px2rem(1px);
             }