diff --git a/style/base.css b/style/base.css
index 64c8b4e..73523cf 100644
--- a/style/base.css
+++ b/style/base.css
@@ -334,6 +334,7 @@ main.hidden {
 .sidebar {
   border-right: 1px solid rgba(0, 0, 0, .07);
   overflow-y: auto;
+  overflow-x: hidden;
   padding: 40px 0 0;
   position: absolute;
   top: 0;