diff --git a/packages/celest_core/lib/celest_core.dart b/packages/celest_core/lib/celest_core.dart
index a560902e..cb69a98f 100644
--- a/packages/celest_core/lib/celest_core.dart
+++ b/packages/celest_core/lib/celest_core.dart
@@ -7,4 +7,5 @@ export 'src/exception/cloud_exception.dart';
 export 'src/exception/serialization_exception.dart';
 
 /// Serialization
+export 'src/serialization/json_value.dart';
 export 'src/serialization/serializer.dart';
diff --git a/packages/celest_core/lib/src/serialization/serializer.dart b/packages/celest_core/lib/src/serialization/serializer.dart
index edd6e239..558151da 100644
--- a/packages/celest_core/lib/src/serialization/serializer.dart
+++ b/packages/celest_core/lib/src/serialization/serializer.dart
@@ -137,6 +137,7 @@ final class _Serializers extends Serializers {
   }
 }
 
+@immutable
 final class TypeToken<T> {
   const TypeToken([this._typeName]);