diff --git a/Mystify/Program.cs b/Mystify/Program.cs
index 694ebb4..34c8228 100644
--- a/Mystify/Program.cs
+++ b/Mystify/Program.cs
@@ -16,7 +16,7 @@ namespace Mystify
             .StartWithClassicDesktopLifetime(args);
 
         // Avalonia configuration, don't remove; also used by visual designer.
-        public static AppBuilder BuildAvaloniaApp()
+        private static AppBuilder BuildAvaloniaApp()
             => AppBuilder.Configure<App>()
                 .UsePlatformDetect()
                 .LogToTrace()