diff --git a/src/FancyMouse.Settings/V2/PreviewStyleSettings.cs b/src/FancyMouse.Settings/V2/PreviewStyleSettings.cs
index caf748d..f11c955 100644
--- a/src/FancyMouse.Settings/V2/PreviewStyleSettings.cs
+++ b/src/FancyMouse.Settings/V2/PreviewStyleSettings.cs
@@ -2,7 +2,7 @@
 
 namespace FancyMouse.Settings.V2;
 
-internal class PreviewStyleSettings
+internal sealed class PreviewStyleSettings
 {
     public PreviewStyleSettings(
         CanvasSizeSettings? canvasSize,