diff --git a/lib/timeline/component/css/item.css b/lib/timeline/component/css/item.css
index 4cd180c6..65923498 100644
--- a/lib/timeline/component/css/item.css
+++ b/lib/timeline/component/css/item.css
@@ -6,6 +6,7 @@
   border-width: 1px;
   background-color: #D5DDF6;
   display: inline-block;
+  z-index: 1;
   /*overflow: hidden;*/
 }