diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0d1b799..59f5edc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.12)
+cmake_minimum_required (VERSION 3.15)	# CMP0094
 
 project (QtPython CXX)
 
diff --git a/cmake/version.cmake b/cmake/version.cmake
index 00c899e..49bfb6e 100644
--- a/cmake/version.cmake
+++ b/cmake/version.cmake
@@ -4,13 +4,13 @@
 
 # Pour la bibliothèque QtPython :
 set (QT_PYTHON_MAJOR_VERSION "6")
-set (QT_PYTHON_MINOR_VERSION "3")
-set (QT_PYTHON_RELEASE_VERSION "3")
+set (QT_PYTHON_MINOR_VERSION "4")
+set (QT_PYTHON_RELEASE_VERSION "0")
 set (QT_PYTHON_VERSION ${QT_PYTHON_MAJOR_VERSION}.${QT_PYTHON_MINOR_VERSION}.${QT_PYTHON_RELEASE_VERSION})
 
 # Pour la bibliothèque QtPython3 :
 set (QT_PYTHON_3_MAJOR_VERSION "6")
-set (QT_PYTHON_3_MINOR_VERSION "3")
-set (QT_PYTHON_3_RELEASE_VERSION "3")
+set (QT_PYTHON_3_MINOR_VERSION "4")
+set (QT_PYTHON_3_RELEASE_VERSION "0")
 set (QT_PYTHON_3_VERSION ${QT_PYTHON_3_MAJOR_VERSION}.${QT_PYTHON_3_MINOR_VERSION}.${QT_PYTHON_3_RELEASE_VERSION})
 
diff --git a/src/QtPython3/CMakeLists.txt b/src/QtPython3/CMakeLists.txt
index 2f56bcd..15b8d42 100644
--- a/src/QtPython3/CMakeLists.txt
+++ b/src/QtPython3/CMakeLists.txt
@@ -5,6 +5,7 @@ find_package (GUIToolkitsVariables)
 
 include (${CMAKE_SOURCE_DIR}/cmake/version.cmake)
 include (${GUIToolkitsVariables_CMAKE_DIR}/common.cmake)
+include (${GUIToolkitsVariables_CMAKE_DIR}/common_qt.cmake)     # QT_MAJOR
 include (${GUIToolkitsVariables_CMAKE_DIR}/python_binding.cmake)
 include (${GUIToolkitsVariables_CMAKE_DIR}/workarounds.cmake)
 
@@ -13,7 +14,7 @@ set (QT_PYTHON_SCRIPTS_DIR "${CMAKE_INSTALL_PREFIX}/${PYTHON_BINDING_DIR}")
 
 find_package (QtUtil 6 REQUIRED)
 find_package (PythonUtil 6 REQUIRED)
-find_package(Qt5Core NO_CMAKE_SYSTEM_PATH)	# In order to enable moc ...
+find_package(Qt${QT_MAJOR}Core NO_CMAKE_SYSTEM_PATH)	# In order to enable moc ...
 
 file (GLOB HEADERS public/${CURRENT_PACKAGE_NAME}/*.h)
 file (GLOB CPP_SOURCES *.cpp *.qrc)
@@ -26,10 +27,10 @@ set_property (TARGET QtPython3 PROPERTY AUTORCC ON)
 set (ALL_TARGETS QtPython3)
 set_property (TARGET QtPython3 PROPERTY VERSION ${QT_PYTHON_3_VERSION})
 set_property (TARGET QtPython3 PROPERTY SOVERSION ${QT_PYTHON_3_MAJOR_VERSION})
-set (QT_LIB_DEPENDENCIES Qt5::Widgets Qt5::Gui Qt5::Core)
-set (QT_INC_DEPENDENCIES ${Qt5Gui_INCLUDE_DIRS} ${Qt5Core_INCLUDE_DIRS})
+set (QT_LIB_DEPENDENCIES Qt${QT_MAJOR}::Widgets Qt${QT_MAJOR}::Gui Qt${QT_MAJOR}::Core)
+set (QT_INC_DEPENDENCIES ${Qt${QT_MAJOR}Gui_INCLUDE_DIRS} ${Qt${QT_MAJOR}Core_INCLUDE_DIRS})
 # Rem : en Qt v 4.* on utilise -DUSE_QT_WEBKIT
-set (QT_PYTHON_3_PUBLIC_FLAGS -DQT_5)
+set (QT_PYTHON_3_PUBLIC_FLAGS -DQT_${QT_MAJOR})
 set (QT_PYTHON_3_PRIVATE_FLAGS -DQT_PYTHON_VERSION="${QT_PYTHON_3_VERSION}")
 
 # REM : on avait historiquement l'instruction suivante, pour contourner un bogue icpc sur plateforme Bull :
diff --git a/src/QtPython3/QtPythonConsole.cpp b/src/QtPython3/QtPythonConsole.cpp
index 7acac2e..a91761f 100644
--- a/src/QtPython3/QtPythonConsole.cpp
+++ b/src/QtPython3/QtPythonConsole.cpp
@@ -17,15 +17,9 @@
 
 #include <QThread>
 #include <QPainter>
-#ifndef QT_5
-#include <QtGui/QAction>
-#include <QtGui/QFileDialog>
-#include <QtGui/QMenu>
-#else	// QT_5
 #include <QAction>
 #include <QFileDialog>
 #include <QMenu>
-#endif	// QT_5
 
 #include <frameobject.h>// PyFrameObject
 
@@ -1318,7 +1312,11 @@ void QtPythonConsole::addSwigCompletions (vector<string>& completions, const str
 	{
 		const string	msg	= exc.getFullMessage ( ).utf8 ( );
 		const QString	qmsg (msg.c_str ( ));
+#ifdef QT_5
 		QStringList		lines	= qmsg.split ("\n", QString::KeepEmptyParts);
+#else	// QT_5
+		QStringList		lines	= qmsg.split ("\n", Qt::KeepEmptyParts);
+#endif	// QT_5
 		const	size_t	num		= lines.size ( );
 		if (1 == num)	// On fait comme on peut ...
 			completions.push_back(cppToPython (getSwigCompletion (expression)));
@@ -2722,7 +2720,12 @@ vector<string> QtPythonConsole::getRunnableInstructions (size_t first) const
 {
 	vector<string>	instructions;
 	QString			text	= document ( )->toPlainText ( );
+#ifdef QT_5
 	QStringList		lines	= QString (text).split ("\n", QString::KeepEmptyParts);
+#else	// QT_5
+	QStringList		lines	= QString (text).split ("\n", Qt::KeepEmptyParts);
+#endif	// QT_5
+
 	// On élimine les lignes blanches finales :
 	size_t	last	= lines.size ( );
 	for (size_t i = last; i != 0; i--)
diff --git a/src/QtPython3/QtPythonSyntaxHighlighter.cpp b/src/QtPython3/QtPythonSyntaxHighlighter.cpp
index 3ee47a6..3325258 100644
--- a/src/QtPython3/QtPythonSyntaxHighlighter.cpp
+++ b/src/QtPython3/QtPythonSyntaxHighlighter.cpp
@@ -35,38 +35,53 @@ QtPythonSyntaxHighlighter::QtPythonSyntaxHighlighter (QTextDocument* parent)
 	                << "\\b__\\*\\b";
 	foreach (const QString& pattern, keywordPatterns)
 	{
+#ifdef QT_5
 		rule.pattern	= QRegExp (pattern);
+#else   // QT_5
+		rule.pattern	= QRegularExpression (pattern);
+#endif  // QT_5
+
 		rule.format		= keywordFormat;
 		_highlightingRules.append (rule);
 	}	// foreach (const QString& pattern, keywordPatterns)
 
 	quotationFormat.setForeground (Qt::red);
+#ifdef QT_5
 	rule.pattern	= QRegExp ("\".*\"");
+#else   // QT_5
+	rule.pattern	= QRegularExpression ("\".*\"");
+#endif  // QT_5
 	rule.format		= quotationFormat;
 	_highlightingRules.append (rule);
 	quotationFormat.setFontItalic (true);
 	quotationFormat.setForeground (Qt::cyan);
+#ifdef QT_5
 	rule.pattern	= QRegExp ("\\b[A-Za-z0-9__]+(?=\\()");
+#else   // QT_5
+	rule.pattern	= QRegularExpression ("\\b[A-Za-z0-9__]+(?=\\()");
+#endif  // QT_5
 	rule.format		= functionFormat;
 	_highlightingRules.append (rule);
 	singleLineFormat.setForeground (Qt::blue);
+#ifdef QT_5
 	rule.pattern	= QRegExp ("#[^\n]*");
+#else   // QT_5
+	rule.pattern	= QRegularExpression ("#[^\n]*");
+#endif  // QT_5
 	rule.format		= singleLineFormat;
 	_highlightingRules.append (rule);
 }	// QtPythonSyntaxHighlighter::QtPythonSyntaxHighlighter
 
 
 
-QtPythonSyntaxHighlighter::QtPythonSyntaxHighlighter (
-											const QtPythonSyntaxHighlighter&)
+QtPythonSyntaxHighlighter::QtPythonSyntaxHighlighter (const QtPythonSyntaxHighlighter&)
 	: QSyntaxHighlighter ((QTextDocument*)0)
 {
 	assert (0 && "QtPythonSyntaxHighlighter copy constructor is not allowed.");
 }	// QtPythonSyntaxHighlighter::QtPythonSyntaxHighlighter
 
 
-QtPythonSyntaxHighlighter& QtPythonSyntaxHighlighter::operator = (
-											const QtPythonSyntaxHighlighter&)
+QtPythonSyntaxHighlighter& QtPythonSyntaxHighlighter::operator = (const QtPythonSyntaxHighlighter&)
 {
 	assert (0 && "QtPythonSyntaxHighlighter copy constructor is not allowed.");
 	return *this;
@@ -82,7 +97,9 @@ void QtPythonSyntaxHighlighter::highlightBlock (const QString& text)
 {
 	foreach (const HighlightingRule& rule, _highlightingRules)
 	{
+#ifdef QT_5
 		QRegExp	expression (rule.pattern);
+
 		int		index	= expression.indexIn (text);
 		while (index >= 0)
 		{
@@ -93,12 +110,20 @@ void QtPythonSyntaxHighlighter::highlightBlock (const QString& text)
 			// Sécurité contre une expression mal formulée (=> boucle infinie) :
 			if (length <= 0)
 			{
-				cerr << __FILE__ << ' ' << __LINE__
-				     << " Erreur de formulation de l'expression régulière "
-				     << expression.pattern ( ).toStdString ( ) << endl;
+				cerr << __FILE__ << ' ' << __LINE__ << " Erreur de formulation de l'expression régulière " << expression.pattern ( ).toStdString ( ) << endl;
 				break;
 			}	// if (length <= 0)
 		}	// while (index >= 0)
+#else   // QT_5
+		QRegularExpression	expression (rule.pattern);
+
+		QRegularExpressionMatchIterator	it = expression.globalMatch (text);
+		while (it.hasNext ( ))
+		{
+			QRegularExpressionMatch	match = it.next ( );
+			setFormat (match.capturedStart ( ), match.capturedLength ( ), rule.format);
+		}	// while (it.hasNext ( ))
+#endif  // QT_5
 	}	// foreach (const HighlightingRule& rule, _highlightingRules)
 }	// QtPythonSyntaxHighlighter::highlightBlock
 
diff --git a/src/QtPython3/public/QtPython3/QtPythonConsole.h b/src/QtPython3/public/QtPython3/QtPythonConsole.h
index b4bffd3..13983cd 100644
--- a/src/QtPython3/public/QtPython3/QtPythonConsole.h
+++ b/src/QtPython3/public/QtPython3/QtPythonConsole.h
@@ -18,15 +18,9 @@ typedef struct _object PyObject;
 
 #include <QSettings>
 #include <QIcon>
-#ifndef QT_5
-#include <QtGui/QComboBox>
-#include <QtGui/QMainWindow>
-#include <QtGui/QToolBar>
-#else	// QT_5
 #include <QComboBox>
 #include <QMainWindow>
 #include <QToolBar>
-#endif	// QT_5
 
 #include <fstream>
 #include <memory>
diff --git a/src/QtPython3/public/QtPython3/QtPythonSyntaxHighlighter.h b/src/QtPython3/public/QtPython3/QtPythonSyntaxHighlighter.h
index 6efc8d6..25a6cb5 100644
--- a/src/QtPython3/public/QtPython3/QtPythonSyntaxHighlighter.h
+++ b/src/QtPython3/public/QtPython3/QtPythonSyntaxHighlighter.h
@@ -2,7 +2,9 @@
 #define QT_PYTHON_SYNTAX_HIGHLIGHTER_H
 
 #include <QSyntaxHighlighter>
-
+#ifndef QT_5
+#	include <QRegularExpression>
+#endif	// QT_5
 
 /**
  * Classe permettant la mise en évidence des mots clés du langage python dans
@@ -46,7 +48,12 @@ class QtPythonSyntaxHighlighter : public QSyntaxHighlighter
 
 	struct HighlightingRule
 	{
-		QRegExp			pattern;
+#ifdef QT_5
+		QRegExp				pattern;
+#else   // QT_5
+		QRegularExpression	pattern;
+#endif  // QT_5
+
 		QTextCharFormat	format;
 	};	// struct HighlightingRule
 
diff --git a/versions.txt b/versions.txt
index d6d9dd8..cd0b7c6 100644
--- a/versions.txt
+++ b/versions.txt
@@ -1,3 +1,11 @@
+Version 6.4.0 : 13/12/23
+===============
+
+Portage Qt 6/GUIToolkitsVariables v 1.4.0/QtUtil v 6.4.0 de la console python 3. La console python 2 est considérée obsolète.
+
+cmake_minimum_required (VERSION 3.15)	# CMP0094
+
+
 Version 6.3.3 : 27/10/23
 ===============