diff --git a/lib/binary/reflector-boosthana.h b/lib/binary/reflector-boosthana.h
index fd57de2..fb54f05 100644
--- a/lib/binary/reflector-boosthana.h
+++ b/lib/binary/reflector-boosthana.h
@@ -30,7 +30,7 @@ template <typename Type, Traits::EnableIf<IsCustomType<Type>> *> void readCustom
         boost::hana::keys(customType), [&deserializer, &customType](auto key) { deserializer.read(boost::hana::at_key(customType, key)); });
 }
 
-template <typename Type, Traits::EnableIf<IsCustomType<Type>> *> void writeCustomType(BinarySerializer &serializer, const Type &customType)
+template <typename Type, Traits::EnableIf<IsCustomType<Type>> *> void writeCustomType(BinarySerializer &serializer, const Type &customType, BinaryVersion version)
 {
     boost::hana::for_each(
         boost::hana::keys(customType), [&serializer, &customType](auto key) { serializer.write(boost::hana::at_key(customType, key)); });
diff --git a/lib/binary/reflector.h b/lib/binary/reflector.h
index 32aedc9..312ff37 100644
--- a/lib/binary/reflector.h
+++ b/lib/binary/reflector.h
@@ -33,7 +33,9 @@ template <typename T> struct AdaptedBinarySerializable : public Traits::Bool<fal
     static constexpr const char *qualifiedName = "ReflectiveRapidJSON::AdaptedBinarySerializable";
 };
 
-template <typename Type> struct BinarySerializable;
+using BinaryVersion = std::uint64_t;
+
+template <typename Type, BinaryVersion defaultVersion = 0> struct BinarySerializable;
 
 /*!
  * \brief The BinaryReflector namespace contains BinaryReader and BinaryWriter for automatic binary (de)serialization.
@@ -51,7 +53,7 @@ class BinaryDeserializer;
 class BinarySerializer;
 
 template <typename Type, Traits::EnableIf<IsCustomType<Type>> * = nullptr> void readCustomType(BinaryDeserializer &deserializer, Type &customType);
-template <typename Type, Traits::EnableIf<IsCustomType<Type>> * = nullptr> void writeCustomType(BinarySerializer &serializer, const Type &customType);
+template <typename Type, Traits::EnableIf<IsCustomType<Type>> * = nullptr> void writeCustomType(BinarySerializer &serializer, const Type &customType, BinaryVersion version = 0);
 
 class BinaryDeserializer : public CppUtilities::BinaryReader {
     friend class ::BinaryReflectorTests;
@@ -90,7 +92,7 @@ public:
     template <typename Type, Traits::EnableIf<IsIteratableExceptString<Type>, Traits::HasSize<Type>> * = nullptr> void write(const Type &iteratable);
     template <typename Type, Traits::EnableIf<std::is_enum<Type>> * = nullptr> void write(const Type &enumValue);
     template <typename Type, Traits::EnableIf<IsVariant<Type>> * = nullptr> void write(const Type &variant);
-    template <typename Type, Traits::EnableIf<IsCustomType<Type>> * = nullptr> void write(const Type &customType);
+    template <typename Type, Traits::EnableIf<IsCustomType<Type>> * = nullptr> void write(const Type &customType, BinaryVersion version = 0);
 
 private:
     std::unordered_map<std::uint64_t, bool> m_pointer;
@@ -286,9 +288,9 @@ template <typename Type, Traits::EnableIf<IsVariant<Type>> *> void BinarySeriali
         variant);
 }
 
-template <typename Type, Traits::EnableIf<IsCustomType<Type>> *> void BinarySerializer::write(const Type &customType)
+template <typename Type, Traits::EnableIf<IsCustomType<Type>> *> void BinarySerializer::write(const Type &customType, BinaryVersion version)
 {
-    writeCustomType(*this, customType);
+    writeCustomType(*this, customType, version);
 }
 
 } // namespace BinaryReflector
diff --git a/lib/binary/serializable.h b/lib/binary/serializable.h
index 9e65633..c923b54 100644
--- a/lib/binary/serializable.h
+++ b/lib/binary/serializable.h
@@ -17,25 +17,26 @@ namespace ReflectiveRapidJSON {
 /*!
  * \brief The BinarySerializable class provides the CRTP-base for (de)serializable objects.
  */
-template <typename Type> struct BinarySerializable {
+template <typename Type, BinaryVersion defaultVersion> struct BinarySerializable {
     void toBinary(std::ostream &outputStream) const;
     void restoreFromBinary(std::istream &inputStream);
     static Type fromBinary(std::istream &inputStream);
 
     static constexpr const char *qualifiedName = "ReflectiveRapidJSON::BinarySerializable";
+    static constexpr auto defaultSerializeVersion = defaultVersion;
 };
 
-template <typename Type> inline void BinarySerializable<Type>::toBinary(std::ostream &outputStream) const
+template <typename Type, BinaryVersion defaultVersion> inline void BinarySerializable<Type, defaultVersion>::toBinary(std::ostream &outputStream) const
 {
-    BinaryReflector::BinarySerializer(&outputStream).write(static_cast<const Type &>(*this));
+    BinaryReflector::BinarySerializer(&outputStream).write(static_cast<const Type &>(*this), defaultVersion);
 }
 
-template <typename Type> inline void BinarySerializable<Type>::restoreFromBinary(std::istream &inputStream)
+template <typename Type, BinaryVersion defaultVersion> inline void BinarySerializable<Type, defaultVersion>::restoreFromBinary(std::istream &inputStream)
 {
     BinaryReflector::BinaryDeserializer(&inputStream).read(static_cast<Type &>(*this));
 }
 
-template <typename Type> Type BinarySerializable<Type>::fromBinary(std::istream &inputStream)
+template <typename Type, BinaryVersion defaultVersion> Type BinarySerializable<Type, defaultVersion>::fromBinary(std::istream &inputStream)
 {
     Type object;
     static_cast<BinarySerializable<Type> &>(object).restoreFromBinary(inputStream);