diff --git a/qtservice/examples/interactive/main.cpp b/qtservice/examples/interactive/main.cpp
index d4858b1..5c0eacb 100644
--- a/qtservice/examples/interactive/main.cpp
+++ b/qtservice/examples/interactive/main.cpp
@@ -39,7 +39,11 @@
 ****************************************************************************/
 
 #include <QApplication>
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
 #include <QDesktopWidget>
+#else
+#include <QScreen>
+#endif
 #include <QLabel>
 #include <QDir>
 #include <QSettings>
@@ -77,8 +81,12 @@ InteractiveService::~InteractiveService()
 void InteractiveService::start()
 {
 #if defined(Q_OS_WIN)
+    #if QT_VERSION < QT_VERSION_CHECK(5, 4, 0)
     if ((QSysInfo::WindowsVersion & QSysInfo::WV_NT_based) &&
         (QSysInfo::WindowsVersion >= QSysInfo::WV_VISTA)) {
+    #else
+    if(QSysInfo::productVersion().toUInt() >= 8) {
+    #endif
         logMessage( "Service GUI not allowed on Windows Vista. See the documentation for this example for more information.", QtServiceBase::Error );
         return;
     }
@@ -87,7 +95,11 @@ void InteractiveService::start()
     qApp->setQuitOnLastWindowClosed(false);
 
     gui = new QLabel("Service", 0, Qt::WindowStaysOnTopHint | Qt::FramelessWindowHint);
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
     gui->move(QApplication::desktop()->availableGeometry().topLeft());
+#else
+    gui->move(qApp->primaryScreen()->availableGeometry().topLeft());
+#endif
     gui->show();
 }
 
diff --git a/qtservice/examples/server/main.cpp b/qtservice/examples/server/main.cpp
index ebcc218..009579e 100644
--- a/qtservice/examples/server/main.cpp
+++ b/qtservice/examples/server/main.cpp
@@ -46,7 +46,9 @@
 #include <QStringList>
 #include <QDir>
 #include <QSettings>
-
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+#include <QRegularExpression>
+#endif
 #include "qtservice.h"
 
 // HttpDaemon is the the class that implements the simple HTTP server.
@@ -98,7 +100,12 @@ private slots:
         // document back.
         QTcpSocket* socket = (QTcpSocket*)sender();
         if (socket->canReadLine()) {
-            QStringList tokens = QString(socket->readLine()).split(QRegExp("[ \r\n][ \r\n]*"));
+            QStringList tokens;
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+            tokens = QString(socket->readLine()).split(QRegularExpression("[ \r\n][ \r\n]*"));
+#else
+            tokens = QString(socket->readLine()).split(QRegExp("[ \r\n][ \r\n]*"));
+#endif
             if (tokens[0] == "GET") {
                 QTextStream os(socket);
                 os.setAutoDetectUnicode(true);
diff --git a/qtservice/src/qtservice.cpp b/qtservice/src/qtservice.cpp
index 5eae058..3374a1e 100644
--- a/qtservice/src/qtservice.cpp
+++ b/qtservice/src/qtservice.cpp
@@ -663,7 +663,7 @@ QtServiceBase::QtServiceBase(int argc, char **argv, const QString &name)
     d_ptr = new QtServiceBasePrivate(nm);
     d_ptr->q_ptr = this;
 
-    d_ptr->serviceFlags = 0;
+    d_ptr->serviceFlags = static_cast<ServiceFlags>(0);
     d_ptr->sysd = 0;
     for (int i = 0; i < argc; ++i)
         d_ptr->args.append(QString::fromLocal8Bit(argv[i]));
diff --git a/qtservice/src/qtservice.h b/qtservice/src/qtservice.h
index 01d5b07..4fb3c3c 100644
--- a/qtservice/src/qtservice.h
+++ b/qtservice/src/qtservice.h
@@ -59,7 +59,7 @@
 #  define QT_QTSERVICE_EXPORT
 #endif
 
-class QStringList;
+//class QStringList;
 class QtServiceControllerPrivate;
 
 class QT_QTSERVICE_EXPORT QtServiceController
diff --git a/qtservice/src/qtservice_win.cpp b/qtservice/src/qtservice_win.cpp
index e5b7ecc..3b9a1ae 100644
--- a/qtservice/src/qtservice_win.cpp
+++ b/qtservice/src/qtservice_win.cpp
@@ -737,10 +737,17 @@ class QtServiceAppEventFilter : public QAbstractNativeEventFilter
 {
 public:
     QtServiceAppEventFilter() {}
-    bool nativeEventFilter(const QByteArray &eventType, void *message, long *result);
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+    virtual bool nativeEventFilter(const QByteArray &eventType, void *message, qintptr *result);
+#else
+    bool nativeEventFilter(const QByteArray &eventType, void *message, long *result) override;
+#endif
 };
-
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+bool QtServiceAppEventFilter::nativeEventFilter(const QByteArray &, void *message, qintptr *result)
+#else
 bool QtServiceAppEventFilter::nativeEventFilter(const QByteArray &, void *message, long *result)
+#endif
 {
     MSG *winMessage = (MSG*)message;
     if (winMessage->message == WM_ENDSESSION && (winMessage->lParam & ENDSESSION_LOGOFF)) {