diff --git a/src/oatpp/parser/json/mapping/Serializer.cpp b/src/oatpp/parser/json/mapping/Serializer.cpp
index cd7c99d1..f1acd5f4 100644
--- a/src/oatpp/parser/json/mapping/Serializer.cpp
+++ b/src/oatpp/parser/json/mapping/Serializer.cpp
@@ -155,11 +155,12 @@ void Serializer::serializeObject(Serializer* serializer,
   auto dispatcher = static_cast<const oatpp::data::mapping::type::__class::AbstractObject::PolymorphicDispatcher*>(polymorph.valueType->polymorphicDispatcher);
   auto fields = dispatcher->getProperties()->getList();
   auto object = static_cast<oatpp::BaseObject*>(polymorph.get());
+  auto config = serializer->getConfig();
 
   for (auto const& field : fields) {
 
     auto value = field->get(object);
-    if(value || serializer->getConfig()->includeNullFields) {
+    if (value || config->includeNullFields || (field->info.required && config->alwaysIncludeRequired)) {
       (first) ? first = false : stream->writeSimple(",", 1);
       serializeString(stream, (p_char8)field->name, std::strlen(field->name));
       stream->writeSimple(":", 1);
diff --git a/src/oatpp/parser/json/mapping/Serializer.hpp b/src/oatpp/parser/json/mapping/Serializer.hpp
index 7174d9e8..ab754624 100644
--- a/src/oatpp/parser/json/mapping/Serializer.hpp
+++ b/src/oatpp/parser/json/mapping/Serializer.hpp
@@ -65,9 +65,15 @@ public:
 
     /**
      * Include fields with value == nullptr into serialized json.
+     * Field will still be included when field-info `required` is set to true and &id:alwaysIncludeRequired is set to true.
      */
     bool includeNullFields = true;
 
+    /**
+     * Always include required fields (set in in DTO_FIELD_INFO) even if they are `value == nullptr`
+     */
+    bool alwaysIncludeRequired = false;
+
     /**
      * If `true` - insert string `"<unknown-type>"` in json field value in case unknown field found.
      * Fail if `false`.