diff --git a/windows/App.xaml.cs b/windows/App.xaml.cs
index 5262408..eac5784 100644
--- a/windows/App.xaml.cs
+++ b/windows/App.xaml.cs
@@ -18,6 +18,7 @@ public partial class App : Application
     protected override void OnStartup(StartupEventArgs e)
     {
         base.OnStartup(e);
+        ThemeManager.Initialize();
         SetupTray();
         ScheduleTimer(ViewModel.RefreshInterval);