diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2ced981..2cd2538 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.12)
+cmake_minimum_required(VERSION 3.15)
 
 # Rem : langage C ajouté pour VTK 9 car sinon il refuse de charger MPI_C demandé par ParallelMPI ...
 project (QtVtk CXX C)
diff --git a/cmake/version.cmake b/cmake/version.cmake
index 8361cda..1934196 100644
--- a/cmake/version.cmake
+++ b/cmake/version.cmake
@@ -3,8 +3,8 @@
 #
 
 set (QT_VTK_MAJOR_VERSION "8")
-set (QT_VTK_MINOR_VERSION "4")
-set (QT_VTK_RELEASE_VERSION "1")
+set (QT_VTK_MINOR_VERSION "5")
+set (QT_VTK_RELEASE_VERSION "0")
 set (QT_VTK_VERSION ${QT_VTK_MAJOR_VERSION}.${QT_VTK_MINOR_VERSION}.${QT_VTK_RELEASE_VERSION})
 
 
diff --git a/src/QtVtk/CMakeLists.txt b/src/QtVtk/CMakeLists.txt
index 484414b..0f4cee2 100644
--- a/src/QtVtk/CMakeLists.txt
+++ b/src/QtVtk/CMakeLists.txt
@@ -5,12 +5,13 @@ find_package (GUIToolkitsVariables)
 
 include (${CMAKE_SOURCE_DIR}/cmake/version.cmake)
 include (${GUIToolkitsVariables_CMAKE_DIR}/common.cmake)
+include (${GUIToolkitsVariables_CMAKE_DIR}/common_qt.cmake)
 include (${GUIToolkitsVariables_CMAKE_DIR}/workarounds.cmake)
 
 find_package (VtkContrib 5 REQUIRED)
 include (${CMAKE_SOURCE_DIR}/cmake/qtvtk_common.cmake)	# Après VtkContrib qui positionne les variables VTK_7, VTK_8 et VTK_9
 find_package (QtUtil 6 REQUIRED)
-find_package(Qt5Core NO_CMAKE_SYSTEM_PATH)				# In order to enable moc ...
+find_package(Qt${QT_MAJOR}Core NO_CMAKE_SYSTEM_PATH)	# In order to enable moc ...
 if (VTK_9)
 	find_package (VTK COMPONENTS GUISupportQt IOExportGL2PS FiltersExtraction)
 endif (VTK_9)
diff --git a/src/QtVtk/QtVTKPrintHelper.cpp b/src/QtVtk/QtVTKPrintHelper.cpp
index 9c3d56f..8c42b12 100644
--- a/src/QtVtk/QtVTKPrintHelper.cpp
+++ b/src/QtVtk/QtVTKPrintHelper.cpp
@@ -95,8 +95,10 @@ QtVTKPrintHelper::PrinterStatus QtVTKPrintHelper::print (vtkRenderWindow& window
 		// S'assurer que la boite de dialogue d'impression ait bien disparue.
 		if (0 != top)
 			top->raise ( );
+#ifdef QT_5
 		while (true == qApp->hasPendingEvents ( ))
 			qApp->processEvents ( );
+#endif	// QT_5
 		QtAutoWaitingCursor	cursor (true);
 		if (printer.outputFileName ( ).size ( ) != 0)
 		{
@@ -125,7 +127,7 @@ QtVTKPrintHelper::PrinterStatus QtVTKPrintHelper::print (vtkRenderWindow& window
 			string	tmpPSFile (tmpFile + ".ps");
 			PrintCommand::CommandOptions	options;
 			options.eraseFile	= true;
-			options.copiesNumber= (size_t)printer.numCopies ( );
+			options.copiesNumber= (size_t)printer.copyCount ( );
 			printToFile (window, tmpPSFile, 720);
 			string		printerName	= printer.printerName ( ).toStdString ( );
 			printToPrinter (tmpPSFile, printerName, options);
@@ -206,8 +208,10 @@ QtVTKPrintHelper::PrinterStatus QtVTKPrintHelper::printToFile (vtkRenderWindow&
 		// S'assurer que la boite de dialogue d'impression ait bien disparue.
 		if (0 != top)
 			top->raise ( );
+#ifdef QT_5
 		while (true == qApp->hasPendingEvents ( ))
 			qApp->processEvents ( );
+#endif	// QT_5
 		QtAutoWaitingCursor	cursor (true);
 
 		QStringList	fileList	= dialog.selectedFiles ( );
@@ -262,8 +266,10 @@ QtVTKPrintHelper::PrinterStatus QtVTKPrintHelper::printTo4kFile (vtkRenderWindow
 		// S'assurer que la boite de dialogue d'impression ait bien disparue.
 		if (0 != top)
 			top->raise ( );
+#ifdef QT_5
 		while (true == qApp->hasPendingEvents ( ))
 			qApp->processEvents ( );
+#endif	// QT_5
 		QtAutoWaitingCursor	cursor (true);
 
 		QStringList	fileList	= dialog.selectedFiles ( );
diff --git a/src/QtVtk/QtVtkGraphicWidget.cpp b/src/QtVtk/QtVtkGraphicWidget.cpp
index dd30dd3..452cbe6 100644
--- a/src/QtVtk/QtVtkGraphicWidget.cpp
+++ b/src/QtVtk/QtVtkGraphicWidget.cpp
@@ -132,7 +132,11 @@ vtkRenderWindow* QtVtkGraphicWidget::GetRenderWindow ( )	// v 8.1.1
 #endif
 
 
+#ifdef QT_5
 void QtVtkGraphicWidget::enterEvent (QEvent* event)
+#else	// QT_5
+void QtVtkGraphicWidget::enterEvent (QEnterEvent* event)
+#endif	// QT_5
 {
 	setFocus ( );
 	
diff --git a/src/QtVtk/public/QtVtk/QtVtkGraphicWidget.h b/src/QtVtk/public/QtVtk/QtVtkGraphicWidget.h
index 06b4602..3587b68 100644
--- a/src/QtVtk/public/QtVtk/QtVtkGraphicWidget.h
+++ b/src/QtVtk/public/QtVtk/QtVtkGraphicWidget.h
@@ -67,9 +67,13 @@ class QtVtkGraphicWidget : public QVTKOpenGLWidget
 
 	protected :
 
+#ifdef QT_5
 	virtual void enterEvent (QEvent* event);
+#else	// QT_5
+	virtual void enterEvent (QEnterEvent* event);
+#endif	// QT_5
 	virtual void focusInEvent (QFocusEvent* event);
-
+	
 	
 	private :
 	
diff --git a/versions.txt b/versions.txt
index 4284e8b..84d6a19 100644
--- a/versions.txt
+++ b/versions.txt
@@ -1,5 +1,10 @@
 A FAIRE : tester le vtkIntersectionPolyDataFilter de VTK 7, voir si de base il propose les services attendus (Inner, ...).
 
+Version 8.5.0 : 13/12/23
+===============
+
+Portage Qt 6/QtUtil v 6.4.0/GUIToolkitsVariables v 1.4.0.
+
 
 Version 8.4.0 : 21/06/23
 ===============