diff --git a/src/Framework/Framework/ViewModel/Serialization/DefaultViewModelSerializer.cs b/src/Framework/Framework/ViewModel/Serialization/DefaultViewModelSerializer.cs
index 714b81eab..54bb4a235 100644
--- a/src/Framework/Framework/ViewModel/Serialization/DefaultViewModelSerializer.cs
+++ b/src/Framework/Framework/ViewModel/Serialization/DefaultViewModelSerializer.cs
@@ -49,7 +49,7 @@ public record SerializationException(bool Serialize, Type? ViewModelType, string
         /// <summary>
         /// Initializes a new instance of the <see cref="DefaultViewModelSerializer"/> class.
         /// </summary>
-        public DefaultViewModelSerializer(DotvvmConfiguration configuration, IViewModelProtector protector, IViewModelSerializationMapper serializationMapper, IViewModelServerCache viewModelServerCache, IViewModelTypeMetadataSerializer viewModelTypeMetadataSerializer, IDotvvmJsonOptionsProvider jsonOptions, ILogger<DefaultViewModelSerializer>? logger)
+        public DefaultViewModelSerializer(DotvvmConfiguration configuration, IViewModelProtector protector, IViewModelSerializationMapper serializationMapper, IViewModelServerCache viewModelServerCache, IViewModelTypeMetadataSerializer viewModelTypeMetadataSerializer, IDotvvmJsonOptionsProvider jsonOptions, ILogger<DefaultViewModelSerializer>? logger = null)
         {
             this.viewModelProtector = protector;
             this.viewModelMapper = serializationMapper;
diff --git a/src/Framework/Framework/ViewModel/Serialization/ViewModelSerializationMapper.cs b/src/Framework/Framework/ViewModel/Serialization/ViewModelSerializationMapper.cs
index 17738372c..b573ac698 100644
--- a/src/Framework/Framework/ViewModel/Serialization/ViewModelSerializationMapper.cs
+++ b/src/Framework/Framework/ViewModel/Serialization/ViewModelSerializationMapper.cs
@@ -28,7 +28,7 @@ public class ViewModelSerializationMapper : IViewModelSerializationMapper
         private readonly ILogger<ViewModelSerializationMapper>? logger;
 
         public ViewModelSerializationMapper(IValidationRuleTranslator validationRuleTranslator, IViewModelValidationMetadataProvider validationMetadataProvider,
-            IPropertySerialization propertySerialization, DotvvmConfiguration configuration, IDotvvmJsonOptionsProvider jsonOptions, ILogger<ViewModelSerializationMapper>? logger)
+            IPropertySerialization propertySerialization, DotvvmConfiguration configuration, IDotvvmJsonOptionsProvider jsonOptions, ILogger<ViewModelSerializationMapper>? logger = null)
         {
             this.validationRuleTranslator = validationRuleTranslator;
             this.validationMetadataProvider = validationMetadataProvider;