diff --git a/stylesheets/components/NavSidebar.scss b/stylesheets/components/NavSidebar.scss
index 8bbee5a53..eacc2ab19 100644
--- a/stylesheets/components/NavSidebar.scss
+++ b/stylesheets/components/NavSidebar.scss
@@ -3,7 +3,7 @@
 
 .NavSidebar {
   position: relative;
-  z-index: 10;
+  z-index: $z-index-base;
   height: 100%;
   display: flex;
   flex-direction: column;