diff --git a/Plan/common/src/main/resources/assets/plan/web/css/style.css b/Plan/common/src/main/resources/assets/plan/web/css/style.css
index bfe45a47f..e7ab5ad75 100644
--- a/Plan/common/src/main/resources/assets/plan/web/css/style.css
+++ b/Plan/common/src/main/resources/assets/plan/web/css/style.css
@@ -1377,4 +1377,8 @@ body.sidebar-hidden .navbar-nav {
 .dataTables_paginate {
     padding-bottom: 0.5rem;
     padding-right: 0.5rem;
+}
+
+.sidebar .nav-item .collapse {
+    z-index: 2;
 }
\ No newline at end of file