diff --git a/converse.css b/converse.css
index cb39700b6..bc5aff659 100644
--- a/converse.css
+++ b/converse.css
@@ -734,6 +734,7 @@ div#settings {
     background-color: white;
     border-bottom-right-radius: 4px;
     border-bottom-left-radius: 4px;
+    width: 100%;
 }
 
 div#chatrooms {