diff --git a/packages/neon/neon/lib/src/settings/models/storage.dart b/packages/neon/neon/lib/src/settings/models/storage.dart
index 399af196..ab4fc105 100644
--- a/packages/neon/neon/lib/src/settings/models/storage.dart
+++ b/packages/neon/neon/lib/src/settings/models/storage.dart
@@ -73,7 +73,7 @@ final class SingleValueStorage {
 
 @immutable
 @internal
-class AppStorage implements SettingsStorage {
+final class AppStorage implements SettingsStorage {
   const AppStorage(this._id);
 
   final String _id;