diff --git a/stylesheets/_conversation.scss b/stylesheets/_conversation.scss
index 92a613e45..1e1c3b739 100644
--- a/stylesheets/_conversation.scss
+++ b/stylesheets/_conversation.scss
@@ -29,6 +29,7 @@
     display: flex;
     flex-direction: column;
     flex-grow: 1;
+    width: 100%;
   }
 
   .main.panel {