diff --git a/ckanext/zarr/assets/css/zarr.css b/ckanext/zarr/assets/css/zarr.css
index 7311899..4c23660 100644
--- a/ckanext/zarr/assets/css/zarr.css
+++ b/ckanext/zarr/assets/css/zarr.css
@@ -375,4 +375,8 @@
     letter-spacing: 0.1em;
     text-align: inherit;
     float: right;
+}
+
+ul.nav.nav-tabs {
+    z-index: 9;
 }
\ No newline at end of file