diff --git a/client/components/dropdown/dropdown.less b/client/components/dropdown/dropdown.less
index bf9a65cff..edaa5935a 100644
--- a/client/components/dropdown/dropdown.less
+++ b/client/components/dropdown/dropdown.less
@@ -1,6 +1,6 @@
 
-
 .menu-list {
+	contain          : content;
 	position         : fixed;
 	z-index          : 1000;
 	top              : anchor(bottom);