diff --git a/umap/static/umap/css/panel.css b/umap/static/umap/css/panel.css
index 3ecabbd2..73e82500 100644
--- a/umap/static/umap/css/panel.css
+++ b/umap/static/umap/css/panel.css
@@ -13,7 +13,7 @@
     border: 1px solid var(--color-lightGray);
 }
 .panel.dark {
-    border-left: 1px solid #222;
+    border: 1px solid #222;
     background-color: var(--color-darkGray);
     color: #efefef;
 }