diff --git a/cateditor/src/components/CatalogContents.vue b/cateditor/src/components/CatalogContents.vue
index fad7b13..4320d0d 100644
--- a/cateditor/src/components/CatalogContents.vue
+++ b/cateditor/src/components/CatalogContents.vue
@@ -445,5 +445,7 @@ function addSectionDrops(myvue) {
 .list-group {
   background-color: #ccc;
   min-height: 200px;
+  max-height: 400px;
+  overflow-y: auto;
 }
 </style>