diff --git a/GenshinLyreMidiPlayer.WPF/ViewModels/MainWindowViewModel.cs b/GenshinLyreMidiPlayer.WPF/ViewModels/MainWindowViewModel.cs
index 37e432b..708bf8c 100644
--- a/GenshinLyreMidiPlayer.WPF/ViewModels/MainWindowViewModel.cs
+++ b/GenshinLyreMidiPlayer.WPF/ViewModels/MainWindowViewModel.cs
@@ -62,11 +62,11 @@ public void ToggleTheme()
     {
         ThemeManager.Current.ApplicationTheme = _theme.GetTheme() switch
         {
-            ThemeType.Unknown => ApplicationTheme.Dark,
-            ThemeType.Dark => ApplicationTheme.Light,
-            ThemeType.Light => ApplicationTheme.Dark,
+            ThemeType.Unknown      => ApplicationTheme.Dark,
+            ThemeType.Dark         => ApplicationTheme.Light,
+            ThemeType.Light        => ApplicationTheme.Dark,
             ThemeType.HighContrast => ApplicationTheme.Dark,
-            _ => ApplicationTheme.Dark
+            _                      => ApplicationTheme.Dark
         };
 
         SettingsView.OnThemeChanged();
diff --git a/GenshinLyreMidiPlayer.WPF/ViewModels/SettingsPageViewModel.cs b/GenshinLyreMidiPlayer.WPF/ViewModels/SettingsPageViewModel.cs
index 7993045..5e3d913 100644
--- a/GenshinLyreMidiPlayer.WPF/ViewModels/SettingsPageViewModel.cs
+++ b/GenshinLyreMidiPlayer.WPF/ViewModels/SettingsPageViewModel.cs
@@ -319,20 +319,11 @@ await Task.Delay(start, PlayTimerToken.Token)
     [UsedImplicitly]
     public void OnThemeChanged()
     {
-        ThemeManager.Current.ApplicationTheme ??= _theme.GetSystemTheme() switch
-        {
-            ThemeType.Unknown      => ApplicationTheme.Light,
-            ThemeType.Dark         => ApplicationTheme.Dark,
-            ThemeType.Light        => ApplicationTheme.Light,
-            ThemeType.HighContrast => ApplicationTheme.Dark,
-            _                      => ApplicationTheme.Light
-        };
-        
         _theme.SetTheme(ThemeManager.Current.ApplicationTheme switch
         {
             ApplicationTheme.Light => ThemeType.Light,
             ApplicationTheme.Dark  => ThemeType.Dark,
-            _                      => ThemeType.Light
+            _                      => _theme.GetSystemTheme()
         });
 
         Settings.Modify(s => s.AppTheme = (int?) ThemeManager.Current.ApplicationTheme ?? -1);