diff --git a/ejson/Number.cpp b/ejson/Number.cpp
index aef53ca..d8ac22f 100644
--- a/ejson/Number.cpp
+++ b/ejson/Number.cpp
@@ -42,6 +42,22 @@ void ejson::Number::set(double _value) {
 	static_cast<ejson::internal::Number*>(m_data.get())->set(_value);
 }
 
+void ejson::Number::set(uint64_t _value) {
+	if (m_data == nullptr) {
+		EJSON_ERROR("Can not set (nullptr) ...");
+		return;
+	}
+	static_cast<ejson::internal::Number*>(m_data.get())->set(_value);
+}
+
+void ejson::Number::set(int64_t _value) {
+	if (m_data == nullptr) {
+		EJSON_ERROR("Can not set (nullptr) ...");
+		return;
+	}
+	static_cast<ejson::internal::Number*>(m_data.get())->set(_value);
+}
+
 double ejson::Number::get(double _errorValue) const {
 	if (m_data == nullptr) {
 		EJSON_ERROR("Can not get (nullptr) ...");
@@ -49,3 +65,19 @@ double ejson::Number::get(double _errorValue) const {
 	}
 	return static_cast<ejson::internal::Number*>(m_data.get())->get();
 }
+
+uint64_t ejson::Number::getU64(uint64_t _errorValue) const {
+	if (m_data == nullptr) {
+		EJSON_ERROR("Can not get (nullptr) ...");
+		return _errorValue;
+	}
+	return static_cast<ejson::internal::Number*>(m_data.get())->getU64();
+}
+
+int64_t ejson::Number::getI64(int64_t _errorValue) const {
+	if (m_data == nullptr) {
+		EJSON_ERROR("Can not get (nullptr) ...");
+		return _errorValue;
+	}
+	return static_cast<ejson::internal::Number*>(m_data.get())->getI64();
+}
diff --git a/ejson/Number.h b/ejson/Number.h
index 2deef21..fce551b 100644
--- a/ejson/Number.h
+++ b/ejson/Number.h
@@ -42,12 +42,34 @@ namespace ejson {
 			 * @param[in] _value New value of the node.
 			 */
 			void set(double _value);
+			/**
+			 * @brief set the value of the node.
+			 * @param[in] _value New value of the node (integer mode).
+			 */
+			void set(uint64_t _value);
+			/**
+			 * @brief set the value of the node.
+			 * @param[in] _value New value of the node (integer mode).
+			 */
+			void set(int64_t _value);
 			/**
 			 * @brief Get the current element Value.
 			 * @param[in] _errorValue Value return if no value Exist
 			 * @return The double number registered
 			 */
 			double get(double _errorValue=0.0) const;
+			/**
+			 * @brief Get the current element Value.
+			 * @param[in] _errorValue Value return if no value Exist
+			 * @return The unsigned integer number registered
+			 */
+			uint64_t getU64(uint64_t _errorValue=0) const;
+			/**
+			 * @brief Get the current element Value.
+			 * @param[in] _errorValue Value return if no value Exist
+			 * @return The integer number registered
+			 */
+			int64_t getI64(int64_t _errorValue=0) const;
 	};
 }
 
diff --git a/ejson/internal/Number.cpp b/ejson/internal/Number.cpp
index daafcb1..76e6657 100644
--- a/ejson/internal/Number.cpp
+++ b/ejson/internal/Number.cpp
@@ -12,26 +12,62 @@
 ememory::SharedPtr<ejson::internal::Number> ejson::internal::Number::create(double _value) {
 	return ememory::SharedPtr<ejson::internal::Number>(new ejson::internal::Number(_value));
 }
+ememory::SharedPtr<ejson::internal::Number> ejson::internal::Number::create(uint64_t _value) {
+	return ememory::SharedPtr<ejson::internal::Number>(new ejson::internal::Number(_value));
+}
+ememory::SharedPtr<ejson::internal::Number> ejson::internal::Number::create(int64_t _value) {
+	return ememory::SharedPtr<ejson::internal::Number>(new ejson::internal::Number(_value));
+}
 
 ejson::internal::Number::Number(double _value) :
+  m_typeNumber(ejson::internal::Number::type::tDouble),
   m_value(_value) {
 	m_type = ejson::valueType::number;
 }
 
+ejson::internal::Number::Number(uint64_t _value) :
+  m_typeNumber(ejson::internal::Number::type::tUint),
+  m_valueU64(_value) {
+	m_type = ejson::valueType::number;
+}
+
+ejson::internal::Number::Number(int64_t _value) :
+  m_typeNumber(ejson::internal::Number::type::tInt),
+  m_valueI64(_value) {
+	m_type = ejson::valueType::number;
+}
+
 bool ejson::internal::Number::iParse(const std::string& _data, size_t& _pos, ejson::FilePos& _filePos, ejson::internal::Document& _doc) {
 	EJSON_PARSE_ELEMENT("start parse : 'Number' ");
 	std::string tmpVal;
+	bool isDouble = false;
 	for (size_t iii=_pos; iii<_data.size(); iii++) {
 		_filePos.check(_data[iii]);
 		#ifdef ENABLE_DISPLAY_PARSED_ELEMENT
 			drawElementParsed(_data[iii], _filePos);
 		#endif
-		if(true == checkNumber(_data[iii])) {
+		if(checkNumber(_data[iii]) == true) {
+			if (    _data[iii] == '.'
+			     || _data[iii] == 'e'
+			     || _data[iii] == '^') {
+				isDouble = true;
+			}
 			tmpVal+=_data[iii];
 		} else {
 			_pos = iii-1;
-			m_value = etk::string_to_double(tmpVal);
-			EJSON_PARSE_ELEMENT("end parse : 'Number' " << tmpVal << " >> " << m_value);
+			if (isDouble == true) {
+				m_typeNumber = ejson::internal::Number::type::tDouble;
+				m_value = etk::string_to_double(tmpVal);
+				EJSON_PARSE_ELEMENT("end parse : 'Number' " << tmpVal << " >> double=" << m_value);
+			} else if (tmpVal[0] == '-') {
+				m_typeNumber = ejson::internal::Number::type::tInt;
+				m_valueI64 = etk::string_to_double(tmpVal);
+				EJSON_PARSE_ELEMENT("end parse : 'Number' " << tmpVal << " >> int64_t=" << m_valueI64);
+			} else {
+				m_typeNumber = ejson::internal::Number::type::tUint;
+				m_valueU64 = etk::string_to_double(tmpVal);
+				EJSON_PARSE_ELEMENT("end parse : 'Number' " << tmpVal << " >> uint64_t=" << m_valueU64);
+			}
 			return true;
 		}
 	}
@@ -41,24 +77,41 @@ bool ejson::internal::Number::iParse(const std::string& _data, size_t& _pos, ejs
 }
 
 bool ejson::internal::Number::iGenerate(std::string& _data, size_t _indent) const {
-	// special thing to remove .000000 at the end of perfect number ...
-	int64_t tmpVal = m_value;
-	if (double(tmpVal) == m_value) {
-		_data += etk::to_string(tmpVal);
-	} else {
-		_data += etk::to_string(m_value);
+	if (m_typeNumber == ejson::internal::Number::type::tDouble) {
+		// special thing to remove .000000 at the end of perfect number ...
+		int64_t tmpVal = m_value;
+		if (double(tmpVal) == m_value) {
+			_data += etk::to_string(tmpVal);
+		} else {
+			_data += etk::to_string(m_value);
+		}
+		return true;
 	}
+	if (m_typeNumber == ejson::internal::Number::type::tInt) {
+		_data += etk::to_string(m_valueI64);
+		return true;
+	}
+	_data += etk::to_string(m_valueU64);
 	return true;
 }
 
 void ejson::internal::Number::iMachineGenerate(std::string& _data) const {
-	// special thing to remove .000000 at the end of perfect number ...
-	int64_t tmpVal = m_value;
-	if ((double)tmpVal == m_value) {
-		_data += etk::to_string(tmpVal);
-	} else {
-		_data += etk::to_string(m_value);
+	if (m_typeNumber == ejson::internal::Number::type::tDouble) {
+		// special thing to remove .000000 at the end of perfect number ...
+		int64_t tmpVal = m_value;
+		if (double(tmpVal) == m_value) {
+			_data += etk::to_string(tmpVal);
+		} else {
+			_data += etk::to_string(m_value);
+		}
+		return;
 	}
+	if (m_typeNumber == ejson::internal::Number::type::tInt) {
+		_data += etk::to_string(m_valueI64);
+		return;
+	}
+	_data += etk::to_string(m_valueU64);
+	return;
 }
 
 
@@ -73,13 +126,36 @@ bool ejson::internal::Number::transfertIn(ememory::SharedPtr<ejson::internal::Va
 	}
 	ememory::SharedPtr<ejson::internal::Number> other = std::static_pointer_cast<ejson::internal::Number>(_obj);
 	// remove destination elements
-	other->m_value = m_value;
-	m_value = 0;
+	other->m_typeNumber = m_typeNumber;
+	m_typeNumber = ejson::internal::Number::type::tUint;
+	m_valueU64 = 0;
+	switch (m_typeNumber) {
+		case ejson::internal::Number::type::tDouble:
+			other->m_value = m_value;
+			break;
+		case ejson::internal::Number::type::tInt:
+			other->m_valueI64 = m_valueI64;
+			break;
+		case ejson::internal::Number::type::tUint:
+			other->m_valueU64 = m_valueU64;
+			break;
+	}
 	return true;
 }
 
 ememory::SharedPtr<ejson::internal::Value> ejson::internal::Number::clone() const {
-	ememory::SharedPtr<ejson::internal::Number> output = ejson::internal::Number::create(m_value);
+	ememory::SharedPtr<ejson::internal::Number> output;
+	switch (m_typeNumber) {
+		case ejson::internal::Number::type::tDouble:
+			output = ejson::internal::Number::create(m_value);
+			break;
+		case ejson::internal::Number::type::tInt:
+			output = ejson::internal::Number::create(m_valueI64);
+			break;
+		case ejson::internal::Number::type::tUint:
+			output = ejson::internal::Number::create(m_valueU64);
+			break;
+	}
 	if (output == nullptr) {
 		EJSON_ERROR("Allocation error ...");
 		return ememory::SharedPtr<ejson::internal::Value>();
@@ -88,9 +164,52 @@ ememory::SharedPtr<ejson::internal::Value> ejson::internal::Number::clone() cons
 }
 
 void ejson::internal::Number::set(double _value) {
+	m_typeNumber = ejson::internal::Number::type::tDouble;
 	m_value = _value;
 }
 
-double ejson::internal::Number::get() const {
-	return m_value;
+void ejson::internal::Number::set(uint64_t _value) {
+	m_typeNumber = ejson::internal::Number::type::tUint;
+	m_valueU64 = _value;
+}
+
+void ejson::internal::Number::set(int64_t _value) {
+	m_typeNumber = ejson::internal::Number::type::tInt;
+	m_valueI64 = _value;
+}
+
+double ejson::internal::Number::get() const {
+	switch (m_typeNumber) {
+		case ejson::internal::Number::type::tDouble:
+			return m_value;
+		case ejson::internal::Number::type::tInt:
+			return double(m_valueI64);
+		case ejson::internal::Number::type::tUint:
+			return double(m_valueU64);
+	}
+	return 0.0;
+}
+
+uint64_t ejson::internal::Number::getU64() const {
+	switch (m_typeNumber) {
+		case ejson::internal::Number::type::tDouble:
+			return uint64_t(m_value);
+		case ejson::internal::Number::type::tInt:
+			return uint64_t(m_valueI64);
+		case ejson::internal::Number::type::tUint:
+			return m_valueU64;
+	}
+	return 0;
+}
+
+int64_t ejson::internal::Number::getI64() const {
+	switch (m_typeNumber) {
+		case ejson::internal::Number::type::tDouble:
+			return int64_t(m_value);
+		case ejson::internal::Number::type::tInt:
+			return m_valueI64;
+		case ejson::internal::Number::type::tUint:
+			return int64_t(m_valueU64);
+	}
+	return 0;
 }
diff --git a/ejson/internal/Number.h b/ejson/internal/Number.h
index 1d48954..fc800c9 100644
--- a/ejson/internal/Number.h
+++ b/ejson/internal/Number.h
@@ -19,27 +19,61 @@ namespace ejson {
 				 * @brief basic element of a xml structure
 				 * @param[in] _value Value to set on the ejson::Value
 				 */
-				Number(double _value=0.0);
+				Number(uint64_t _value=0);
+				Number(int64_t _value);
+				Number(double _value);
 			public:
 				/**
 				 * @brief Create factory on the ejson::internal::Number
 				 * @param[in] _value Value to set on the ejson::Value
 				 * @return A SharedPtr on the Number value
 				 */
-				static ememory::SharedPtr<Number> create(double _value=0.0);
+				static ememory::SharedPtr<Number> create(uint64_t _value=0);
+				static ememory::SharedPtr<Number> create(int64_t _value);
+				static ememory::SharedPtr<Number> create(double _value);
 			protected:
-				double m_value; //!< value of the node
+				enum class type {
+					tDouble,
+					tInt,
+					tUint,
+				};
+				type m_typeNumber;
+				union {
+					double m_value; //!< value of the node
+					uint64_t m_valueU64; //!< value of the node
+					int64_t m_valueI64; //!< value of the node
+				};
 			public:
 				/**
 				 * @brief set the value of the node.
 				 * @param[in] _value New value of the node.
 				 */
 				void set(double _value);
+				/**
+				 * @brief set the value of the node.
+				 * @param[in] _value New value of the node.
+				 */
+				void set(int64_t _value);
+				/**
+				 * @brief set the value of the node.
+				 * @param[in] _value New value of the node.
+				 */
+				void set(uint64_t _value);
 				/**
 				 * @brief Get the current element Value.
 				 * @return The double number registered
 				 */
 				double get() const;
+				/**
+				 * @brief Get the current element Value.
+				 * @return The unsigned integer  number registered
+				 */
+				uint64_t getU64() const;
+				/**
+				 * @brief Get the current element Value.
+				 * @return The unsigned integer  number registered
+				 */
+				int64_t getI64() const;
 			public:
 				bool iParse(const std::string& _data, size_t& _pos, ejson::FilePos& _filePos, ejson::internal::Document& _doc) override;
 				bool iGenerate(std::string& _data, size_t _indent) const override;