diff --git a/demo/Semi.Avalonia.Demo/Views/MainWindow.axaml b/demo/Semi.Avalonia.Demo/Views/MainWindow.axaml
index 87dc847..896c2b0 100644
--- a/demo/Semi.Avalonia.Demo/Views/MainWindow.axaml
+++ b/demo/Semi.Avalonia.Demo/Views/MainWindow.axaml
@@ -9,7 +9,6 @@
     d:DesignHeight="450"
     d:DesignWidth="800"
     ExtendClientAreaToDecorationsHint="True"
-    ExtendClientAreaTitleBarHeightHint="40"
     Icon="/Assets/irihi.ico"
     mc:Ignorable="d">
     <views:MainView Margin="{Binding $parent[Window].WindowDecorationMargin}" />