diff --git a/.reuse/dep5 b/.reuse/dep5
index b71aea14..5162d4e4 100644
--- a/.reuse/dep5
+++ b/.reuse/dep5
@@ -86,4 +86,4 @@ License: LGPL-2.1-only or GPL-3.0-only
 # qt-oldfile-2
 Files: xcb/libqt5xcbqpa-dev/5.1*.*/* xcb/libqt6xcbqpa-dev/6.*.*/*
 Copyright: The Qt Company Ltd.
-License: LGPL-3.0-only or GPL-2.0-only or GPL-3.0-or-later
+License: LicenseRef-Qt-Commercial or LGPL-3.0-only or GPL-2.0-only or GPL-3.0-or-later
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 51626bc1..86b8728b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -39,7 +39,7 @@ set(CMAKE_INCLUDE_CURRENT_DIR ON)
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 set(CMAKE_AUTOMOC ON)
 set(CMAKE_AUTORCC ON)
-set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(REQUIRED_QT_VERSION 5.15.0)
 if (CMAKE_BUILD_TYPE STREQUAL "Debug")
diff --git a/LICENSES/LicenseRef-Qt-Commercial.txt b/LICENSES/LicenseRef-Qt-Commercial.txt
new file mode 100644
index 00000000..825b1f35
--- /dev/null
+++ b/LICENSES/LicenseRef-Qt-Commercial.txt
@@ -0,0 +1,8 @@
+Licensees holding valid commercial Qt licenses may use this software in
+accordance with the the terms contained in a written agreement between
+you and The Qt Company. Alternatively, the terms and conditions that were
+accepted by the licensee when buying and/or downloading the
+software do apply.
+
+For the latest licensing terms and conditions, see https://www.qt.io/terms-conditions.
+For further information use the contact form at https://www.qt.io/contact-us.
diff --git a/src/dbackingstoreproxy.cpp b/src/dbackingstoreproxy.cpp
index 62b2b3da..c2b56453 100644
--- a/src/dbackingstoreproxy.cpp
+++ b/src/dbackingstoreproxy.cpp
@@ -14,7 +14,17 @@
 #include <private/qguiapplication_p.h>
 #include <private/qhighdpiscaling_p.h>
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
+#if __has_include("utility.h")
+#define __D_HAS_UTILITY__
+#endif
+#else
 #if QT_HAS_INCLUDE("utility.h")
+#define __D_HAS_UTILITY__
+#endif
+#endif
+
+#ifdef __D_HAS_UTILITY__
 #include "utility.h"
 #include "dwmsupport.h"
 #else
diff --git a/src/dnativesettings.cpp b/src/dnativesettings.cpp
index a6f33c57..f5b0bc20 100644
--- a/src/dnativesettings.cpp
+++ b/src/dnativesettings.cpp
@@ -6,7 +6,17 @@
 #ifdef Q_OS_LINUX
 #include "dxcbxsettings.h"
 #endif
+#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
+#if __has_include("dplatformintegration.h")
+#define __D_HAS_DPLATFORMINTEGRATION__
+#endif
+#else
 #if QT_HAS_INCLUDE("dplatformintegration.h")
+#define __D_HAS_DPLATFORMINTEGRATION__
+#endif
+#endif
+
+#ifdef __D_HAS_DPLATFORMINTEGRATION__
 #include "dplatformintegration.h"
 #define IN_DXCB_PLUGIN
 #endif
diff --git a/src/dxcbxsettings.cpp b/src/dxcbxsettings.cpp
index f39511e3..4e42682d 100644
--- a/src/dxcbxsettings.cpp
+++ b/src/dxcbxsettings.cpp
@@ -5,7 +5,17 @@
 
 #include "dxcbxsettings.h"
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
+#if __has_include("dplatformintegration.h")
+#define __D_HAS_DPLATFORMINTEGRATION__
+#endif
+#else
 #if QT_HAS_INCLUDE("dplatformintegration.h")
+#define __D_HAS_DPLATFORMINTEGRATION__
+#endif
+#endif
+
+#ifdef __D_HAS_DPLATFORMINTEGRATION__
 #include "dplatformintegration.h"
 #include "qxcbconnection.h"
 #define IN_DXCB_PLUGIN
diff --git a/xcb/dforeignplatformwindow.h b/xcb/dforeignplatformwindow.h
index 6555a6b1..b32ea0a7 100644
--- a/xcb/dforeignplatformwindow.h
+++ b/xcb/dforeignplatformwindow.h
@@ -10,6 +10,9 @@
 #include <QtGlobal>
 
 #ifdef Q_OS_LINUX
+#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
+#include <any>
+#endif
 #define private public
 #include "qxcbwindow.h"
 typedef QXcbWindow QNativeWindow;
diff --git a/xcb/dplatformintegration.cpp b/xcb/dplatformintegration.cpp
index 20b6b243..c58594d5 100644
--- a/xcb/dplatformintegration.cpp
+++ b/xcb/dplatformintegration.cpp
@@ -839,7 +839,11 @@ static xcb_cursor_t overrideCreateFontCursor(QXcbCursor *xcb_cursor, QCursor *c,
         // special case for non-standard dnd-* cursors
         cursor = loadCursor(dpy, cshape);
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
+        if (!cursor && !xcb_cursor->m_callbackForPropertyRegistered) {
+#else
         if (!cursor && !xcb_cursor->m_gtkCursorThemeInitialized) {
+#endif
             VtableHook::callOriginalFun(xcb_cursor, &QPlatformCursor::changeCursor, c, window);
 
             if (updateCursorTheme(dpy)) {
diff --git a/xcb/dplatformwindowhelper.h b/xcb/dplatformwindowhelper.h
index e3c95c78..ace4692c 100644
--- a/xcb/dplatformwindowhelper.h
+++ b/xcb/dplatformwindowhelper.h
@@ -8,6 +8,9 @@
 #include <QtGlobal>
 
 #ifdef Q_OS_LINUX
+#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
+#include <any>
+#endif
 #define private public
 #include "qxcbwindow.h"
 #include "qxcbclipboard.h"