diff --git a/demo/Semi.Avalonia.Demo/Views/MainView.axaml.cs b/demo/Semi.Avalonia.Demo/Views/MainView.axaml.cs
index b48ee71..3a69c9c 100644
--- a/demo/Semi.Avalonia.Demo/Views/MainView.axaml.cs
+++ b/demo/Semi.Avalonia.Demo/Views/MainView.axaml.cs
@@ -18,7 +18,7 @@ public partial class MainView : UserControl
         if (app is not null)
         {
             var theme = app.ActualThemeVariant;
-            app.RequestedThemeVariant = theme == ThemeVariant.Dark ? ThemeVariant.Default : ThemeVariant.Dark;
+            app.RequestedThemeVariant = theme == ThemeVariant.Dark ? ThemeVariant.Light : ThemeVariant.Dark;
         }
     }
 }
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