diff --git a/less/category.less b/less/category.less
index e862ae4..2538d7d 100644
--- a/less/category.less
+++ b/less/category.less
@@ -2,6 +2,8 @@
 
 	.topic-list {
 		margin-top: 10px;
+		overflow-x: hidden;
+		overflow-y: auto;
 	}
 
 	> ul {