diff --git a/www/kanban/app-kanban.less b/www/kanban/app-kanban.less
index 2ee8f8e15..9654e9f5b 100644
--- a/www/kanban/app-kanban.less
+++ b/www/kanban/app-kanban.less
@@ -114,6 +114,7 @@
         border: 1px solid @colortheme_modal-input;
         .CodeMirror {
             height: 105px;
+            resize: vertical;
         }
         .CodeMirror-scroll {
             box-sizing: content-box;