diff --git a/bemani/frontend/static/site.css b/bemani/frontend/static/site.css
index 29405e8..4e32055 100644
--- a/bemani/frontend/static/site.css
+++ b/bemani/frontend/static/site.css
@@ -129,7 +129,6 @@ ul.navigation li {
 ul.navigation_sub {
     display: none;
     position: absolute;
-    top: 100%;
     background-color: #e4e4e4;
     padding: 10px;
     margin: 0;