diff --git a/app/assets/javascripts/work_items/components/work_item_ancestors/disclosure_hierarchy.vue b/app/assets/javascripts/work_items/components/work_item_ancestors/disclosure_hierarchy.vue
index e9acb83aaf862ff1c83a407a6ead2a7e08458986..5f8d0081043c3bca1518bc256da72b083bfd803b 100644
--- a/app/assets/javascripts/work_items/components/work_item_ancestors/disclosure_hierarchy.vue
+++ b/app/assets/javascripts/work_items/components/work_item_ancestors/disclosure_hierarchy.vue
@@ -86,7 +86,7 @@ export default {
 <template>
   <div
     v-gl-resize-observer="handleResize"
-    class="disclosure-hierarchy gl-relative gl-z-1 gl-flex gl-min-w-0 gl-grow-2"
+    class="disclosure-hierarchy gl-relative gl-z-2 gl-flex gl-min-w-0 gl-grow-2"
   >
     <ul class="gl-relative gl-m-0 gl-inline-flex gl-max-w-full gl-list-none gl-flex-row gl-p-0">
       <template v-if="withEllipsis || isMobile">