diff --git a/ejson/Array.cpp b/ejson/Array.cpp
index 5f5c5dd..efc0875 100644
--- a/ejson/Array.cpp
+++ b/ejson/Array.cpp
@@ -42,7 +42,7 @@ size_t ejson::Array::size() const {
 		EJSON_ERROR("Can not size (nullptr) ...");
 		return 0;
 	}
-	return static_cast<ejson::internal::Array*>(m_data.get())->size();
+	return static_cast<const ejson::internal::Array*>(m_data.get())->size();
 }
 
 ejson::Value ejson::Array::operator[] (size_t _id) {
@@ -58,7 +58,7 @@ const ejson::Value ejson::Array::operator[] (size_t _id) const {
 		EJSON_ERROR("Can not get (nullptr) ...");
 		return ejson::Value(nullptr);;
 	}
-	return ejson::Value(static_cast<ejson::internal::Array*>(m_data.get())->get(_id));
+	return ejson::Value(static_cast<const ejson::internal::Array*>(m_data.get())->get(_id));
 }
 
 bool ejson::Array::add(const ejson::Value& _element) {
diff --git a/ejson/Boolean.cpp b/ejson/Boolean.cpp
index 799fac3..06149b4 100644
--- a/ejson/Boolean.cpp
+++ b/ejson/Boolean.cpp
@@ -48,6 +48,6 @@ bool ejson::Boolean::get(bool _errorValue) const {
 		EJSON_ERROR("Can not get (nullptr) ...");
 		return _errorValue;
 	}
-	return static_cast<ejson::internal::Boolean*>(m_data.get())->get();
+	return static_cast<const ejson::internal::Boolean*>(m_data.get())->get();
 }
 
diff --git a/ejson/Number.cpp b/ejson/Number.cpp
index 4551557..ab16627 100644
--- a/ejson/Number.cpp
+++ b/ejson/Number.cpp
@@ -63,7 +63,7 @@ double ejson::Number::get(double _errorValue) const {
 		EJSON_ERROR("Can not get (nullptr) ...");
 		return _errorValue;
 	}
-	return static_cast<ejson::internal::Number*>(m_data.get())->get();
+	return static_cast<const ejson::internal::Number*>(m_data.get())->get();
 }
 
 uint64_t ejson::Number::getU64(uint64_t _errorValue) const {
@@ -71,7 +71,7 @@ uint64_t ejson::Number::getU64(uint64_t _errorValue) const {
 		EJSON_ERROR("Can not get (nullptr) ...");
 		return _errorValue;
 	}
-	return static_cast<ejson::internal::Number*>(m_data.get())->getU64();
+	return static_cast<const ejson::internal::Number*>(m_data.get())->getU64();
 }
 
 int64_t ejson::Number::getI64(int64_t _errorValue) const {
@@ -79,7 +79,7 @@ int64_t ejson::Number::getI64(int64_t _errorValue) const {
 		EJSON_ERROR("Can not get (nullptr) ...");
 		return _errorValue;
 	}
-	return static_cast<ejson::internal::Number*>(m_data.get())->getI64();
+	return static_cast<const ejson::internal::Number*>(m_data.get())->getI64();
 }
 
 ejson::internal::Number::type ejson::Number::getType() const {
@@ -87,7 +87,7 @@ ejson::internal::Number::type ejson::Number::getType() const {
 		EJSON_ERROR("Can not get (nullptr) ...");
 		return ejson::internal::Number::type::tDouble;
 	}
-	return static_cast<ejson::internal::Number*>(m_data.get())->getType();
+	return static_cast<const ejson::internal::Number*>(m_data.get())->getType();
 }
 
 
diff --git a/ejson/Object.cpp b/ejson/Object.cpp
index e7f464a..f0d77ef 100644
--- a/ejson/Object.cpp
+++ b/ejson/Object.cpp
@@ -62,7 +62,7 @@ const ejson::Value ejson::Object::operator[] (const std::string& _name) const {
 		EJSON_ERROR("Can not operator[] (nullptr) ...");
 		return ejson::Value(nullptr);
 	}
-	return ejson::Value(static_cast<ejson::internal::Object*>(m_data.get())->get(_name));
+	return ejson::Value(static_cast<const ejson::internal::Object*>(m_data.get())->get(_name));
 }
 
 std::vector<std::string> ejson::Object::getKeys() const {
@@ -70,7 +70,7 @@ std::vector<std::string> ejson::Object::getKeys() const {
 		EJSON_ERROR("Can not getKeys (nullptr) ...");
 		return std::vector<std::string>();
 	}
-	return static_cast<ejson::internal::Object*>(m_data.get())->getKeys();
+	return static_cast<const ejson::internal::Object*>(m_data.get())->getKeys();
 }
 
 size_t ejson::Object::size() const {
@@ -94,7 +94,7 @@ const ejson::Value ejson::Object::operator[] (size_t _id) const {
 		EJSON_ERROR("Can not operator[] (nullptr) ...");
 		return ejson::Value(nullptr);
 	}
-	return ejson::Value(static_cast<ejson::internal::Object*>(m_data.get())->get(_id));
+	return ejson::Value(static_cast<const ejson::internal::Object*>(m_data.get())->get(_id));
 }
 
 std::string ejson::Object::getKey(size_t _id) const {
@@ -102,7 +102,7 @@ std::string ejson::Object::getKey(size_t _id) const {
 		EJSON_ERROR("Can not getKey (nullptr) ...");
 		return "";
 	}
-	return static_cast<ejson::internal::Object*>(m_data.get())->getKey(_id);
+	return static_cast<const ejson::internal::Object*>(m_data.get())->getKey(_id);
 }
 
 bool ejson::Object::add(const std::string& _name, const ejson::Value& _value) {
diff --git a/ejson/String.cpp b/ejson/String.cpp
index 18362d1..bf02a70 100644
--- a/ejson/String.cpp
+++ b/ejson/String.cpp
@@ -46,5 +46,5 @@ std::string ejson::String::get(const std::string& _errorValue) const {
 		EJSON_ERROR("Can not get (nullptr) ...");
 		return _errorValue;
 	}
-	return static_cast<ejson::internal::String*>(m_data.get())->get();
+	return static_cast<const ejson::internal::String*>(m_data.get())->get();
 }
diff --git a/ejson/Value.cpp b/ejson/Value.cpp
index d40497e..8098fff 100644
--- a/ejson/Value.cpp
+++ b/ejson/Value.cpp
@@ -48,7 +48,7 @@ std::string ejson::Value::generateHumanString() const {
 		EJSON_ERROR("Can not remove (nullptr) ...");
 		return out;
 	}
-	static_cast<ejson::internal::Value*>(m_data.get())->iGenerate(out, 0);
+	static_cast<const ejson::internal::Value*>(m_data.get())->iGenerate(out, 0);
 	return out;
 }
 
@@ -58,7 +58,7 @@ std::string ejson::Value::generateMachineString() const {
 		EJSON_ERROR("Can not remove (nullptr) ...");
 		return out;
 	}
-	static_cast<ejson::internal::Value*>(m_data.get())->iMachineGenerate(out);
+	static_cast<const ejson::internal::Value*>(m_data.get())->iMachineGenerate(out);
 	return out;
 }
 
diff --git a/ejson/internal/Array.cpp b/ejson/internal/Array.cpp
index f13c528..2bc7512 100644
--- a/ejson/internal/Array.cpp
+++ b/ejson/internal/Array.cpp
@@ -156,7 +156,7 @@ bool ejson::internal::Array::iGenerate(std::string& _data, size_t _indent) const
 		oneLine=false;
 	} else {
 		for (size_t iii=0; iii<m_value.size() ; iii++) {
-			ememory::SharedPtr<const ejson::internal::Value> tmp = m_value[iii];
+			const ememory::SharedPtr<ejson::internal::Value> tmp = m_value[iii];
 			if (tmp == nullptr) {
 				continue;
 			}
@@ -170,7 +170,7 @@ bool ejson::internal::Array::iGenerate(std::string& _data, size_t _indent) const
 				break;
 			}
 			if (tmp->getType() == ejson::valueType::string) {
-				ememory::SharedPtr<const ejson::internal::String> tmp2 = std::static_pointer_cast<const ejson::internal::String>(tmp);
+				const ememory::SharedPtr<ejson::internal::String> tmp2 = ememory::staticPointerCast<ejson::internal::String>(tmp);
 				if(tmp2->get().size()>40) {
 					oneLine=false;
 					break;
@@ -230,7 +230,7 @@ ememory::SharedPtr<ejson::internal::Value> ejson::internal::Array::get(size_t _i
 	return m_value[_id];
 }
 
-const ememory::SharedPtr<const ejson::internal::Value> ejson::internal::Array::get(size_t _id) const {
+const ememory::SharedPtr<ejson::internal::Value> ejson::internal::Array::get(size_t _id) const {
 	return m_value[_id];
 }
 
@@ -260,7 +260,7 @@ bool ejson::internal::Array::transfertIn(ememory::SharedPtr<ejson::internal::Val
 		EJSON_ERROR("Request transfer on an element that is not an Array");
 		return false;
 	}
-	ememory::SharedPtr<ejson::internal::Array> other = std::static_pointer_cast<ejson::internal::Array>(_obj);
+	ememory::SharedPtr<ejson::internal::Array> other = ememory::staticPointerCast<ejson::internal::Array>(_obj);
 	// remove destination elements
 	other->clear();
 	// Copy to the destination
diff --git a/ejson/internal/Array.h b/ejson/internal/Array.h
index f302714..c1808c3 100644
--- a/ejson/internal/Array.h
+++ b/ejson/internal/Array.h
@@ -46,7 +46,7 @@ namespace ejson {
 				 * @param[in] _id Id of the element.
 				 * @return nullptr if the element does not exist.
 				 */
-				const ememory::SharedPtr<const ejson::internal::Value> get(size_t _id) const;
+				const ememory::SharedPtr<ejson::internal::Value> get(size_t _id) const;
 				/**
 				 * @brief add an element on the array.
 				 * @param[in] _element element to add.
diff --git a/ejson/internal/Boolean.cpp b/ejson/internal/Boolean.cpp
index aadf26d..0f4510e 100644
--- a/ejson/internal/Boolean.cpp
+++ b/ejson/internal/Boolean.cpp
@@ -81,7 +81,7 @@ bool ejson::internal::Boolean::transfertIn(ememory::SharedPtr<ejson::internal::V
 		EJSON_ERROR("Request transfer on an element that is not an Boolean");
 		return false;
 	}
-	ememory::SharedPtr<ejson::internal::Boolean> other = std::static_pointer_cast<ejson::internal::Boolean>(_obj);
+	ememory::SharedPtr<ejson::internal::Boolean> other = ememory::staticPointerCast<ejson::internal::Boolean>(_obj);
 	// remove destination elements
 	other->m_value = m_value;
 	m_value = false;
diff --git a/ejson/internal/Number.cpp b/ejson/internal/Number.cpp
index 76e6657..2bb5908 100644
--- a/ejson/internal/Number.cpp
+++ b/ejson/internal/Number.cpp
@@ -124,7 +124,7 @@ bool ejson::internal::Number::transfertIn(ememory::SharedPtr<ejson::internal::Va
 		EJSON_ERROR("Request transfer on an element that is not an Number");
 		return false;
 	}
-	ememory::SharedPtr<ejson::internal::Number> other = std::static_pointer_cast<ejson::internal::Number>(_obj);
+	ememory::SharedPtr<ejson::internal::Number> other = ememory::staticPointerCast<ejson::internal::Number>(_obj);
 	// remove destination elements
 	other->m_typeNumber = m_typeNumber;
 	m_typeNumber = ejson::internal::Number::type::tUint;
diff --git a/ejson/internal/Object.cpp b/ejson/internal/Object.cpp
index c37a584..b2a5b02 100644
--- a/ejson/internal/Object.cpp
+++ b/ejson/internal/Object.cpp
@@ -220,7 +220,7 @@ bool ejson::internal::Object::iGenerate(std::string& _data, size_t _indent) cons
 		oneLine = false;
 	} else {
 		for (int32_t iii=0; iii<m_value.size() ; iii++) {
-			ememory::SharedPtr<const ejson::internal::Value> tmp = m_value[iii];
+			const ememory::SharedPtr<ejson::internal::Value> tmp = m_value[iii];
 			if (tmp == nullptr) {
 				continue;
 			}
@@ -234,7 +234,7 @@ bool ejson::internal::Object::iGenerate(std::string& _data, size_t _indent) cons
 				break;
 			}
 			if (tmp->getType() == ejson::valueType::string) {
-				ememory::SharedPtr<const ejson::internal::String> tmp2 = std::static_pointer_cast<const ejson::internal::String>(tmp);
+				const ememory::SharedPtr<ejson::internal::String> tmp2 = ememory::staticPointerCast<ejson::internal::String>(tmp);
 				if(    tmp2->get().size()>25
 				    || m_value.getKey(iii).size()>25) {
 					oneLine=false;
@@ -304,7 +304,7 @@ ememory::SharedPtr<ejson::internal::Value> ejson::internal::Object::get(size_t _
 	return m_value[_id];
 }
 
-const ememory::SharedPtr<const ejson::internal::Value> ejson::internal::Object::get(size_t _id) const{
+const ememory::SharedPtr<ejson::internal::Value> ejson::internal::Object::get(size_t _id) const{
 	return m_value[_id];
 }
 
@@ -315,9 +315,9 @@ ememory::SharedPtr<ejson::internal::Value> ejson::internal::Object::get(const st
 	return m_value[_name];
 }
 
-const ememory::SharedPtr<const ejson::internal::Value> ejson::internal::Object::get(const std::string& _name) const {
+const ememory::SharedPtr<ejson::internal::Value> ejson::internal::Object::get(const std::string& _name) const {
 	if (m_value.exist(_name) == false) {
-		return ememory::SharedPtr<const ejson::internal::Value>();
+		return ememory::SharedPtr<ejson::internal::Value>();
 	}
 	return m_value[_name];
 }
@@ -359,7 +359,7 @@ bool ejson::internal::Object::transfertIn(ememory::SharedPtr<ejson::internal::Va
 		EJSON_ERROR("Request transfer on an element that is not an object");
 		return false;
 	}
-	ememory::SharedPtr<ejson::internal::Object> other = std::static_pointer_cast<ejson::internal::Object>(_obj);
+	ememory::SharedPtr<ejson::internal::Object> other = ememory::staticPointerCast<ejson::internal::Object>(_obj);
 	// remove destination elements
 	other->clear();
 	// Copy to the destination
@@ -369,7 +369,7 @@ bool ejson::internal::Object::transfertIn(ememory::SharedPtr<ejson::internal::Va
 	return true;
 }
 
-bool ejson::internal::Object::cloneIn(const ememory::SharedPtr<ejson::internal::Object>& _obj) const {
+bool ejson::internal::Object::cloneIn(ememory::SharedPtr<ejson::internal::Object>& _obj) const {
 	if (_obj == nullptr) {
 		return false;
 	}
diff --git a/ejson/internal/Object.h b/ejson/internal/Object.h
index 33c63e9..6e1bf7b 100644
--- a/ejson/internal/Object.h
+++ b/ejson/internal/Object.h
@@ -56,7 +56,7 @@ namespace ejson {
 				 * @param[in] _name name of the object
 				 * @return pointer on the element requested or nullptr if it not the corect type or does not existed
 				 */
-				const ememory::SharedPtr<const ejson::internal::Value> get(const std::string& _name) const;
+				const ememory::SharedPtr<ejson::internal::Value> get(const std::string& _name) const;
 			public:
 				/**
 				 * @brief Get all the element name (keys).
@@ -79,7 +79,7 @@ namespace ejson {
 				 * @param[in] _id Id of the element.
 				 * @return nullptr if the element does not exist.
 				 */
-				const ememory::SharedPtr<const ejson::internal::Value> get(size_t _id) const;
+				const ememory::SharedPtr<ejson::internal::Value> get(size_t _id) const;
 				/**
 				 * @brief Get the element name (key).
 				 * @param[in] _id Id of the element.
@@ -109,7 +109,7 @@ namespace ejson {
 				 * @param[in] _obj Other object ot overwride
 				 * @return true The clone has been corectly done, false otherwise
 				 */
-				bool cloneIn(const ememory::SharedPtr<ejson::internal::Object>& _obj) const;
+				bool cloneIn(ememory::SharedPtr<ejson::internal::Object>& _obj) const;
 				/**
 				 * @brief Clone the current object
 				 * @return A new object that has been clone
diff --git a/ejson/internal/String.cpp b/ejson/internal/String.cpp
index a6baf75..b8d75ba 100644
--- a/ejson/internal/String.cpp
+++ b/ejson/internal/String.cpp
@@ -100,7 +100,7 @@ bool ejson::internal::String::transfertIn(ememory::SharedPtr<ejson::internal::Va
 		EJSON_ERROR("Request transfer on an element that is not an String");
 		return false;
 	}
-	ememory::SharedPtr<ejson::internal::String> other = std::static_pointer_cast<ejson::internal::String>(_obj);
+	ememory::SharedPtr<ejson::internal::String> other = ememory::staticPointerCast<ejson::internal::String>(_obj);
 	other->m_value = m_value;
 	m_value = "";
 	return true;
diff --git a/ejson/internal/Value.h b/ejson/internal/Value.h
index c0685e6..c836b97 100644
--- a/ejson/internal/Value.h
+++ b/ejson/internal/Value.h
@@ -56,6 +56,7 @@ namespace ejson {
 				  m_type(ejson::valueType::unknow) {
 					m_type = ejson::valueType::value;
 				};
+			public:
 				/**
 				 * @brief Virtualize destructor
 				 */