diff --git a/src/Tochka.JsonRpc.Server/Binding/JsonRpcParameterModelConvention.cs b/src/Tochka.JsonRpc.Server/Binding/JsonRpcParameterModelConvention.cs
index a5f0d37..5996bcc 100644
--- a/src/Tochka.JsonRpc.Server/Binding/JsonRpcParameterModelConvention.cs
+++ b/src/Tochka.JsonRpc.Server/Binding/JsonRpcParameterModelConvention.cs
@@ -44,7 +44,7 @@ public void Apply(ParameterModel parameter)
         foreach (var actionSelector in parameter.Action.Selectors)
         {
             var jsonSerializerOptions = ServerUtils.GetDataJsonSerializerOptions(actionSelector.EndpointMetadata, options, serializerOptionsProviders);
-            var propertyName = jsonSerializerOptions.PropertyNamingPolicy!.ConvertName(parameter.ParameterName);
+            var propertyName = jsonSerializerOptions.ConvertName(parameter.ParameterName);
             var parametersMetadata = actionSelector.EndpointMetadata.Get<JsonRpcActionParametersMetadata>();
             if (parametersMetadata == null)
             {
diff --git a/src/Tochka.JsonRpc.Server/Routing/JsonRpcActionModelConvention.cs b/src/Tochka.JsonRpc.Server/Routing/JsonRpcActionModelConvention.cs
index 62ea8c6..e821473 100644
--- a/src/Tochka.JsonRpc.Server/Routing/JsonRpcActionModelConvention.cs
+++ b/src/Tochka.JsonRpc.Server/Routing/JsonRpcActionModelConvention.cs
@@ -75,8 +75,8 @@ private string GetMethodName(ActionModel action, SelectorModel selector)
         var methodStyleAttribute = selector.EndpointMetadata.Get<JsonRpcMethodStyleAttribute>();
         var methodStyle = methodStyleAttribute?.MethodStyle ?? options.DefaultMethodStyle;
 
-        var controllerName = jsonSerializerOptions.PropertyNamingPolicy!.ConvertName(action.Controller.ControllerName);
-        var actionName = jsonSerializerOptions.PropertyNamingPolicy.ConvertName(action.ActionName);
+        var controllerName = jsonSerializerOptions.ConvertName(action.Controller.ControllerName);
+        var actionName = jsonSerializerOptions.ConvertName(action.ActionName);
         return methodStyle switch
         {
             JsonRpcMethodStyle.ControllerAndAction => $"{controllerName}{JsonRpcConstants.ControllerMethodSeparator}{actionName}",