diff --git a/umap/static/umap/map.css b/umap/static/umap/map.css
index 0a1f937c..745c7bf6 100644
--- a/umap/static/umap/map.css
+++ b/umap/static/umap/map.css
@@ -1323,7 +1323,7 @@ a.add-datalayer:hover,
     margin-bottom: 4px;
     display: flex;
     flex-direction: column;
-    overflow-y: scroll;
+    overflow-y: auto;
 }
 .umap-popup-content iframe {
     min-width: 310px;