diff --git a/threadr/style.css b/threadr/style.css
index b7b7a58..866d9db 100644
--- a/threadr/style.css
+++ b/threadr/style.css
@@ -81,6 +81,8 @@ body {
 
 body.iframe {
   margin: 5px;
+  height: 100%;
+  width: 100%;
 }
 
 p {