diff --git a/src/main/webapp/assets/common/css/gitbucket.css b/src/main/webapp/assets/common/css/gitbucket.css
index 45e4f10..337b989 100644
--- a/src/main/webapp/assets/common/css/gitbucket.css
+++ b/src/main/webapp/assets/common/css/gitbucket.css
@@ -342,6 +342,8 @@
 
 ul.dropdown-menu {
   padding: 2px 0;
+  overflow: auto;
+  max-height: 100vh; 
 }
 
 ul.dropdown-menu li {