diff --git a/CMakeLists.txt b/CMakeLists.txt
index 53406e5a..c9c68e93 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -6,7 +6,7 @@ endif()
 project(PIP)
 set(PIP_MAJOR    5)
 set(PIP_MINOR    5)
-set(PIP_REVISION 3)
+set(PIP_REVISION 4)
 set(PIP_SUFFIX   )
 set(PIP_COMPANY  SHS)
 set(PIP_DOMAIN   org.SHS)
diff --git a/libs/main/serialization/pijson.cpp b/libs/main/serialization/pijson.cpp
index a917f97c..8ef17798 100644
--- a/libs/main/serialization/pijson.cpp
+++ b/libs/main/serialization/pijson.cpp
@@ -400,9 +400,9 @@ PIJSON PIJSON::parseValue(PIString & s) {
 	s.trim();
 	if (s.isEmpty()) return ret;
 	if (s[0] == '{') {
-		ret = parseObject(s.takeRange('{', '}'));
+		ret = parseObject(s.takeRange('{', '}').trim());
 	} else if (s[0] == '[') {
-		ret = parseArray(s.takeRange('[', ']'));
+		ret = parseArray(s.takeRange('[', ']').trim());
 	} else {
 		s.trim();
 		if (s.startsWith('"')) {
diff --git a/libs/main/serialization/pivaluetree_conversions.cpp b/libs/main/serialization/pivaluetree_conversions.cpp
index f3419650..1a84d15c 100644
--- a/libs/main/serialization/pivaluetree_conversions.cpp
+++ b/libs/main/serialization/pivaluetree_conversions.cpp
@@ -42,6 +42,14 @@ PIString mask(const PIString & str) {
 	return ret;
 }
 
+PIString overrideFile(PIString path) {
+	if (path.isEmpty()) return {};
+	PIFile::FileInfo fi(path);
+	auto ext = fi.extension();
+	path.insert(path.size_s() - ext.size_s() - (ext.isEmpty() ? 0 : 1), ".override");
+	return path;
+}
+
 
 PIValueTree PIValueTreeConversions::fromPropertyStorage(const PIPropertyStorage & ps) {
 	PIValueTree ret;
@@ -292,7 +300,11 @@ PIString toTextTree(const PIValueTree & root, PIString prefix, PIValueTreeConver
 		ret += "\n[" + prefix + "]\n";
 		if (root.isArray() && options[PIValueTreeConversions::WithAttributes]) ret += toTextTreeAttributes(root, "", options);
 		for (const auto & c: root.children()) {
-			PIString cp = prefix;
+			if (c.hasChildren()) continue;
+			ret += toTextTree(c, prefix, options);
+		}
+		for (const auto & c: root.children()) {
+			if (!c.hasChildren()) continue;
 			ret += toTextTree(c, prefix, options);
 		}
 	} else {
@@ -315,9 +327,13 @@ PIString toTextTree(const PIValueTree & root, PIString prefix, PIValueTreeConver
 PIString PIValueTreeConversions::toText(const PIValueTree & root, Options options) {
 	PIString ret;
 	for (const auto & c: root.children()) {
-		ret += toTextTree(c, PIString(), options);
+		if (c.hasChildren()) continue;
+		ret += toTextTree(c, {}, options);
+	}
+	for (const auto & c: root.children()) {
+		if (!c.hasChildren()) continue;
+		ret += toTextTree(c, {}, options);
 	}
-
 	return ret;
 }
 
@@ -329,13 +345,26 @@ PIValueTree PIValueTreeConversions::fromText(const PIString & str) {
 
 
 PIValueTree PIValueTreeConversions::fromJSONFile(const PIString & path) {
-	return PIValueTreeConversions::fromJSON(PIJSON::fromJSON(PIString::fromUTF8(PIFile::readAll(path))));
+	auto ret = PIValueTreeConversions::fromJSON(PIJSON::fromJSON(PIString::fromUTF8(PIFile::readAll(path))));
+	auto ofp = overrideFile(path);
+	if (PIFile::isExists(ofp)) {
+		auto override = PIValueTreeConversions::fromJSON(PIJSON::fromJSON(PIString::fromUTF8(PIFile::readAll(ofp))));
+		ret.merge(override);
+	}
+	return ret;
 }
 
 
 PIValueTree PIValueTreeConversions::fromTextFile(const PIString & path) {
 	PIFile f(path, PIIODevice::ReadOnly);
-	return PIValueTreeConversions::fromText(&f);
+	auto ret = PIValueTreeConversions::fromText(&f);
+	auto ofp = overrideFile(path);
+	if (PIFile::isExists(ofp)) {
+		PIFile of(ofp, PIIODevice::ReadOnly);
+		auto override = PIValueTreeConversions::fromText(&of);
+		ret.merge(override);
+	}
+	return ret;
 }
 
 
diff --git a/libs/main/types/pivaluetree.cpp b/libs/main/types/pivaluetree.cpp
index 2d292039..b21f6279 100644
--- a/libs/main/types/pivaluetree.cpp
+++ b/libs/main/types/pivaluetree.cpp
@@ -124,6 +124,23 @@ void PIValueTree::applyValues(const PIValueTree & root, bool recursive) {
 }
 
 
+void PIValueTree::merge(const PIValueTree & root) {
+	if (_is_null) return;
+	for (const auto & c: root._children) {
+		bool found = false;
+		for (auto & i: _children) {
+			if (c.name() == i.name()) {
+				if (c.isValid()) i._value = c._value;
+				i.merge(c);
+				found = true;
+				break;
+			}
+		}
+		if (!found) _children << c;
+	}
+}
+
+
 PIVariant PIValueTree::childValue(const PIString & child_name, const PIVariant & default_value, bool * exists) const {
 	const PIValueTree & node = child(child_name);
 	if (node.isNull()) {
diff --git a/libs/main/types/pivaluetree.h b/libs/main/types/pivaluetree.h
index 323a6a9e..d9ee4865 100644
--- a/libs/main/types/pivaluetree.h
+++ b/libs/main/types/pivaluetree.h
@@ -170,6 +170,13 @@ public:
 	//! \param recursive Если установлено в true, то значения будут применяться рекурсивно к дочерним узлам.
 	void applyValues(const PIValueTree & root, bool recursive = true);
 
+	//! \~\brief
+	//! \~english Set or add the values of a given %PIValueTree object to the current %PIValueTree object.
+	//! \param root The %PIValueTree object whose values are to be merged.
+	//! \~russian Устанавливает или добавляет значения данного объекта %PIValueTree к текущему объекту %PIValueTree.
+	//! \param root Объект %PIValueTree, значения которого должны быть добавлены.
+	void merge(const PIValueTree & root);
+
 	//! \~\brief
 	//! \~english Returns the children of the current %PIValueTree object.
 	//! \~russian Возвращает дочерние элементы текущего объекта %PIValueTree.