diff --git a/Source/LibationAvalonia/App.axaml.cs b/Source/LibationAvalonia/App.axaml.cs
index 8093b885..59fe3f75 100644
--- a/Source/LibationAvalonia/App.axaml.cs
+++ b/Source/LibationAvalonia/App.axaml.cs
@@ -90,14 +90,10 @@ private async void Setup_Closing(object sender, System.ComponentModel.CancelEven
 
 					if (setupDialog.Config.LibationSettingsAreValid)
 					{
-						var theme
-							= setupDialog.SelectedTheme.Content is nameof(ThemeVariant.Dark)
-							? nameof(ThemeVariant.Dark)
-							: nameof(ThemeVariant.Light);
-
+                        string theme = setupDialog.SelectedTheme.Content as string;
+						
 						setupDialog.Config.SetString(theme, nameof(ThemeVariant));
 
-
 						await RunMigrationsAsync(setupDialog.Config);
 						LibraryTask = Task.Run(() => DbContexts.GetLibrary_Flat_NoTracking(includeParents: true));
 						AudibleUtilities.AudibleApiStorage.EnsureAccountsSettingsFileExists();
@@ -208,9 +204,15 @@ static async Task CancelInstallation()
 
 		private static void ShowMainWindow(IClassicDesktopStyleApplicationLifetime desktop)
 		{
-			Current.RequestedThemeVariant = Configuration.Instance.GetString(propertyName: nameof(ThemeVariant)) is "Dark" ? ThemeVariant.Dark : ThemeVariant.Light;
-
-			//Reload colors for current theme
+            Current.RequestedThemeVariant = Configuration.Instance.GetString(propertyName: nameof(ThemeVariant)) switch
+            {
+                nameof(ThemeVariant.Dark) => ThemeVariant.Dark,
+                nameof(ThemeVariant.Light) => ThemeVariant.Light,
+				// "System"
+                _ => ThemeVariant.Default
+            };
+
+            //Reload colors for current theme
 			LoadStyles();
 			var mainWindow = new MainWindow();
 			desktop.MainWindow = MainWindow = mainWindow;
diff --git a/Source/LibationAvalonia/Dialogs/SetupDialog.axaml b/Source/LibationAvalonia/Dialogs/SetupDialog.axaml
index 2a246e89..7f3f81f0 100644
--- a/Source/LibationAvalonia/Dialogs/SetupDialog.axaml
+++ b/Source/LibationAvalonia/Dialogs/SetupDialog.axaml
@@ -2,12 +2,14 @@
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:dialogs="clr-namespace:LibationAvalonia.Dialogs"
         mc:Ignorable="d" d:DesignWidth="500" d:DesignHeight="350"
         x:Class="LibationAvalonia.Dialogs.SetupDialog"
 		WindowStartupLocation="CenterScreen"
 		Width="500" Height="350"
 		Icon="/Assets/libation.ico"
-        Title="Welcome to Libation">
+        Title="Welcome to Libation"
+		x:DataType="dialogs:SetupDialog">
 
 	<Grid
 		Margin="10"
@@ -58,6 +60,7 @@
 				SelectedIndex="0"
 				SelectedItem="{Binding SelectedTheme, Mode=OneWayToSource}">
 				<ComboBox.Items>
+                    <ComboBoxItem Content="System" />
 					<ComboBoxItem Content="Light" />
 					<ComboBoxItem Content="Dark" />
 				</ComboBox.Items>
diff --git a/Source/LibationAvalonia/ViewModels/Settings/ImportantSettingsVM.cs b/Source/LibationAvalonia/ViewModels/Settings/ImportantSettingsVM.cs
index 87d00bd6..c164b449 100644
--- a/Source/LibationAvalonia/ViewModels/Settings/ImportantSettingsVM.cs
+++ b/Source/LibationAvalonia/ViewModels/Settings/ImportantSettingsVM.cs
@@ -31,10 +31,10 @@ public void LoadSettings(Configuration config)
 			LoggingLevel = config.LogLevel;
 			GridScaleFactor = scaleFactorToLinearRange(config.GridScaleFactor);
 			GridFontScaleFactor = scaleFactorToLinearRange(config.GridFontScaleFactor);
-			ThemeVariant = initialThemeVariant
-				= Configuration.Instance.GetString(propertyName: nameof(ThemeVariant)) is nameof(Avalonia.Styling.ThemeVariant.Dark)
-				? nameof(Avalonia.Styling.ThemeVariant.Dark)
-				: nameof(Avalonia.Styling.ThemeVariant.Light);
+
+			ThemeVariant = initialThemeVariant = Configuration.Instance.GetString(propertyName: nameof(ThemeVariant));
+			if (string.IsNullOrWhiteSpace(initialThemeVariant)) 
+				ThemeVariant = initialThemeVariant = "System";
 		}
 
 		public void SaveSettings(Configuration config)
@@ -83,7 +83,7 @@ public void ApplyDisplaySettings()
 		public string GridScaleFactorText { get; } = Configuration.GetDescription(nameof(Configuration.GridScaleFactor));
 		public string GridFontScaleFactorText { get; } = Configuration.GetDescription(nameof(Configuration.GridFontScaleFactor));
 		public string BetaOptInText { get; } = Configuration.GetDescription(nameof(Configuration.BetaOptIn));
-		public string[] Themes { get; } = { nameof(Avalonia.Styling.ThemeVariant.Light), nameof(Avalonia.Styling.ThemeVariant.Dark) };
+		public string[] Themes { get; } = { "System", nameof(Avalonia.Styling.ThemeVariant.Light), nameof(Avalonia.Styling.ThemeVariant.Dark) };
 
 		public string BooksDirectory { get; set; }
 		public bool SavePodcastsToParentFolder { get; set; }