diff --git a/config b/config
index 5fda8ad..5b4c106 100644
--- a/config
+++ b/config
@@ -317,7 +317,7 @@ for_window [title="bluetoothctl"] floating enable
 for_window [title="fzf"] floating enable
 # mark rules
 for_window [class="Plexamp" window_type="normal"] mark s
-for_window [class="Ferdi" window_type="normal" window_role="browser-window"] mark z
+for_window [class="Ferdium" window_type="normal" window_role="browser-window"] mark z
 for_window [class="Signal" window_type="normal" window_role="browser-window"] mark x
 for_window [class="Microsoft Teams - Preview" window_type="normal"] mark c
 # matlab workaround