diff --git a/niri.kdl b/niri.kdl
index 54016bb..9cf9a6f 100644
--- a/niri.kdl
+++ b/niri.kdl
@@ -71,7 +71,7 @@ animations {
 
 window-rule {
     match app-id=r#"^org\.wezfurlong\.wezterm$"#
-    default-column-width {}
+    default-column-width { proportion 0.5; }
 }
 
 window-rule {