diff --git a/src/plugins/android/androidbuildapkstep.cpp b/src/plugins/android/androidbuildapkstep.cpp
index 4f632e44c53..8daa59c34e2 100644
--- a/src/plugins/android/androidbuildapkstep.cpp
+++ b/src/plugins/android/androidbuildapkstep.cpp
@@ -287,7 +287,7 @@ QWidget *AndroidBuildApkWidget::createAdvancedGroup()
 
     auto vbox = new QVBoxLayout(group);
     QtSupport::QtVersion *version = QtSupport::QtKitAspect::qtVersion(m_step->kit());
-    if (version && version->qtVersion() >= QtSupport::QtVersionNumber{5, 14}) {
+    if (version && version->qtVersion() >= QVersionNumber(5, 14)) {
         auto buildAAB = new QCheckBox(tr("Build Android App Bundle (*.aab)"), group);
         buildAAB->setChecked(m_step->buildAAB());
         connect(buildAAB, &QAbstractButton::toggled, m_step, &AndroidBuildApkStep::setBuildAAB);
@@ -505,7 +505,7 @@ bool AndroidBuildApkStep::init()
             reportWarningOrError(error, Task::Error);
             return false;
         }
-    } else if (version->qtVersion() < QtSupport::QtVersionNumber(5, 4, 0)) {
+    } else if (version->qtVersion() < QVersionNumber(5, 4, 0)) {
         const QString error = tr("The minimum Qt version required for Gradle build to work is %1. "
                                  "It is recommended to install the latest Qt version.")
                                   .arg("5.4.0");
@@ -585,7 +585,7 @@ bool AndroidBuildApkStep::init()
 
     // Must be the last option, otherwise androiddeployqt might use the other
     // params (e.g. --sign) to choose not to add gdbserver
-    if (version->qtVersion() >= QtSupport::QtVersionNumber(5, 6, 0)) {
+    if (version->qtVersion() >= QVersionNumber(5, 6, 0)) {
         if (m_addDebugger || buildType() == ProjectExplorer::BuildConfiguration::Debug)
             arguments << "--gdbserver";
         else
@@ -729,8 +729,8 @@ void AndroidBuildApkStep::doRun()
                                             "not be created.").arg(androidLibsDir.toUserOutput()),
                                          Task::Error);
                     return false;
-                } else if (version->qtVersion() >= QtSupport::QtVersionNumber{6, 0, 0}
-                           && version->qtVersion() <= QtSupport::QtVersionNumber{6, 1, 1}) {
+                } else if (version->qtVersion() >= QVersionNumber(6, 0, 0)
+                           && version->qtVersion() <= QVersionNumber(6, 1, 1)) {
                     // 6.0.x <= Qt <= 6.1.1 used to need a manaul call to _prepare_apk_dir target,
                     // and now it's made directly with ALL target, so this code below ensures
                     // these versions are not broken.
diff --git a/src/plugins/android/androidconfigurations.cpp b/src/plugins/android/androidconfigurations.cpp
index 86e8d32ac6a..4612f8b9fd6 100644
--- a/src/plugins/android/androidconfigurations.cpp
+++ b/src/plugins/android/androidconfigurations.cpp
@@ -318,14 +318,14 @@ void AndroidConfig::parseDependenciesJson()
     }
 
     auto fillQtVersionsRange = [](const QString &shortVersion) {
-        QList<QtVersionNumber> versions;
+        QList<QVersionNumber> versions;
         const QRegularExpression re(R"(([0-9]\.[0-9]+\.)\[([0-9]+)\-([0-9]+)\])");
         QRegularExpressionMatch match = re.match(shortVersion);
         if (match.hasMatch() && match.lastCapturedIndex() == 3)
             for (int i = match.captured(2).toInt(); i <= match.captured(3).toInt(); ++i)
-                versions.append(QtVersionNumber(match.captured(1) + QString::number(i)));
+                versions.append(QVersionNumber::fromString(match.captured(1) + QString::number(i)));
         else
-            versions.append(QtVersionNumber(shortVersion + ".-1"));
+            versions.append(QVersionNumber::fromString(shortVersion + ".-1"));
 
         return versions;
     };
@@ -1010,7 +1010,7 @@ bool AndroidConfig::sdkToolsOk() const
 
 QStringList AndroidConfig::essentialsFromQtVersion(const QtVersion &version) const
 {
-    QtVersionNumber qtVersion = version.qtVersion();
+    QVersionNumber qtVersion = version.qtVersion();
     for (const SdkForQtVersions &item : m_specificQtVersions)
         if (item.containsVersion(qtVersion))
             return item.essentialPackages;
@@ -1020,9 +1020,8 @@ QStringList AndroidConfig::essentialsFromQtVersion(const QtVersion &version) con
 
 QString AndroidConfig::ndkPathFromQtVersion(const QtVersion &version) const
 {
-    QtVersionNumber qtVersion(version.qtVersionString());
     for (const SdkForQtVersions &item : m_specificQtVersions)
-        if (item.containsVersion(qtVersion))
+        if (item.containsVersion(version.qtVersion()))
             return item.ndkPath;
 
     return m_defaultSdkDepends.ndkPath;
@@ -1033,10 +1032,11 @@ QStringList AndroidConfig::defaultEssentials() const
     return m_defaultSdkDepends.essentialPackages + m_commonEssentialPkgs;
 }
 
-bool SdkForQtVersions::containsVersion(const QtVersionNumber &qtVersion) const
+bool SdkForQtVersions::containsVersion(const QVersionNumber &qtVersion) const
 {
     return versions.contains(qtVersion)
-           || versions.contains(QtVersionNumber(qtVersion.majorVersion, qtVersion.minorVersion));
+            || versions.contains(QVersionNumber(qtVersion.majorVersion(),
+                                                qtVersion.minorVersion()));
 }
 
 FilePath AndroidConfig::openJDKLocation() const
diff --git a/src/plugins/android/androidconfigurations.h b/src/plugins/android/androidconfigurations.h
index 0a37c9a5447..9042cc599bb 100644
--- a/src/plugins/android/androidconfigurations.h
+++ b/src/plugins/android/androidconfigurations.h
@@ -49,12 +49,12 @@ public:
 
 struct SdkForQtVersions
 {
-    QList<QtSupport::QtVersionNumber> versions;
+    QList<QVersionNumber> versions;
     QStringList essentialPackages;
     QString ndkPath;
 
 public:
-    bool containsVersion(const QtSupport::QtVersionNumber &qtVersion) const;
+    bool containsVersion(const QVersionNumber &qtVersion) const;
 };
 
 class ANDROID_EXPORT AndroidConfig
diff --git a/src/plugins/android/androiddeployqtstep.cpp b/src/plugins/android/androiddeployqtstep.cpp
index 82bbe90fd50..dec905a6bcc 100644
--- a/src/plugins/android/androiddeployqtstep.cpp
+++ b/src/plugins/android/androiddeployqtstep.cpp
@@ -75,7 +75,7 @@ AndroidDeployQtStep::AndroidDeployQtStep(BuildStepList *parent, Utils::Id id)
     m_uninstallPreviousPackage->setValue(false);
 
     const QtSupport::QtVersion * const qt = QtSupport::QtKitAspect::qtVersion(kit());
-    const bool forced = qt && qt->qtVersion() < QtSupport::QtVersionNumber(5, 4, 0);
+    const bool forced = qt && qt->qtVersion() < QVersionNumber(5, 4, 0);
     if (forced) {
         m_uninstallPreviousPackage->setValue(true);
         m_uninstallPreviousPackage->setEnabled(false);
@@ -203,7 +203,7 @@ bool AndroidDeployQtStep::init()
     if (m_uninstallPreviousPackageRun)
         m_manifestName = AndroidManager::manifestPath(target());
 
-    m_useAndroiddeployqt = version->qtVersion() >= QtSupport::QtVersionNumber(5, 4, 0);
+    m_useAndroiddeployqt = version->qtVersion() >= QVersionNumber(5, 4, 0);
     if (m_useAndroiddeployqt) {
         const QString buildKey = target()->activeBuildKey();
         const ProjectNode *node = target()->project()->findNodeForBuildKey(buildKey);
diff --git a/src/plugins/android/androidmanager.cpp b/src/plugins/android/androidmanager.cpp
index 306f4c980f5..3467e71fb42 100644
--- a/src/plugins/android/androidmanager.cpp
+++ b/src/plugins/android/androidmanager.cpp
@@ -232,7 +232,7 @@ FilePath AndroidManager::androidBuildDirectory(const Target *target)
 bool AndroidManager::isQt5CmakeProject(const ProjectExplorer::Target *target)
 {
     const QtSupport::QtVersion *qt = QtSupport::QtKitAspect::qtVersion(target->kit());
-    const bool isQt5 = qt && qt->qtVersion() < QtSupport::QtVersionNumber{6, 0, 0};
+    const bool isQt5 = qt && qt->qtVersion() < QVersionNumber(6, 0, 0);
     const Core::Context cmakeCtx = Core::Context(CMakeProjectManager::Constants::CMAKE_PROJECT_ID);
     const bool isCmakeProject = (target->project()->projectContext() == cmakeCtx);
     return isQt5 && isCmakeProject;
@@ -429,9 +429,9 @@ void AndroidManager::setDeviceApiLevel(Target *target, int level)
 
 int AndroidManager::defaultMinimumSDK(const QtSupport::QtVersion *qtVersion)
 {
-    if (qtVersion && qtVersion->qtVersion() >= QtSupport::QtVersionNumber{6, 0})
+    if (qtVersion && qtVersion->qtVersion() >= QVersionNumber(6, 0))
         return 23;
-    else if (qtVersion && qtVersion->qtVersion() >= QtSupport::QtVersionNumber{5, 13})
+    else if (qtVersion && qtVersion->qtVersion() >= QVersionNumber(5, 13))
         return 21;
     else
         return 16;
diff --git a/src/plugins/android/androidmanifesteditorwidget.cpp b/src/plugins/android/androidmanifesteditorwidget.cpp
index c47a61ee03c..74b40b2b02b 100644
--- a/src/plugins/android/androidmanifesteditorwidget.cpp
+++ b/src/plugins/android/androidmanifesteditorwidget.cpp
@@ -1204,7 +1204,7 @@ void AndroidManifestEditorWidget::addServiceMetadata(QXmlStreamWriter &writer)
     const Target *target = androidTarget(m_textEditorWidget->textDocument()->filePath());
     if (target) {
         const QtSupport::QtVersion *qt = QtSupport::QtKitAspect::qtVersion(target->kit());
-        if (qt && qt->qtVersion() >= QtSupport::QtVersionNumber(6, 2))
+        if (qt && qt->qtVersion() >= QVersionNumber(6, 2))
             return;
     }
     writeMetadataElement("android.app.qt_sources_resource_id", "android:resource", "@array/qt_sources", writer);
diff --git a/src/plugins/android/androidpackageinstallationstep.cpp b/src/plugins/android/androidpackageinstallationstep.cpp
index 51be6b0e665..5757fa8a233 100644
--- a/src/plugins/android/androidpackageinstallationstep.cpp
+++ b/src/plugins/android/androidpackageinstallationstep.cpp
@@ -144,8 +144,8 @@ void AndroidPackageInstallationStep::doRun()
     // Needed for Qt 5.15.0 and Qt 5.14.x versions
     if (buildType() == BuildConfiguration::BuildType::Debug) {
         QtSupport::QtVersion *version = QtSupport::QtKitAspect::qtVersion(kit());
-        if (version && version->qtVersion() >= QtSupport::QtVersionNumber{5, 14}
-            && version->qtVersion() <= QtSupport::QtVersionNumber{5, 15, 0}) {
+        if (version && version->qtVersion() >= QVersionNumber(5, 14)
+            && version->qtVersion() <= QVersionNumber(5, 15, 0)) {
             const QString assetsDebugDir = nativeAndroidBuildPath().append(
                 "/assets/--Added-by-androiddeployqt--/");
             QDir dir;
diff --git a/src/plugins/android/androidqtversion.cpp b/src/plugins/android/androidqtversion.cpp
index 03580292780..6a6cc4b0a11 100644
--- a/src/plugins/android/androidqtversion.cpp
+++ b/src/plugins/android/androidqtversion.cpp
@@ -68,8 +68,7 @@ QString AndroidQtVersion::invalidReason() const
 
 bool AndroidQtVersion::supportsMultipleQtAbis() const
 {
-    return qtVersion() >= QtSupport::QtVersionNumber{5, 14}
-           && qtVersion() < QtSupport::QtVersionNumber{6, 0};
+    return qtVersion() >= QVersionNumber(5, 14) && qtVersion() < QVersionNumber(6, 0);
 }
 
 Abis AndroidQtVersion::detectQtAbis() const
diff --git a/src/plugins/android/androidrunnerworker.cpp b/src/plugins/android/androidrunnerworker.cpp
index a2be168ea8b..491946661b6 100644
--- a/src/plugins/android/androidrunnerworker.cpp
+++ b/src/plugins/android/androidrunnerworker.cpp
@@ -290,7 +290,7 @@ AndroidRunnerWorker::AndroidRunnerWorker(RunWorker *runner, const QString &packa
                                            << ", Debug server path:" << m_debugServerPath;
 
     QtSupport::QtVersion *version = QtSupport::QtKitAspect::qtVersion(target->kit());
-    m_useAppParamsForQmlDebugger = version->qtVersion() >= QtSupport::QtVersionNumber(5, 12);
+    m_useAppParamsForQmlDebugger = version->qtVersion() >= QVersionNumber(5, 12);
 }
 
 AndroidRunnerWorker::~AndroidRunnerWorker()
diff --git a/src/plugins/android/createandroidmanifestwizard.cpp b/src/plugins/android/createandroidmanifestwizard.cpp
index caa57b73439..03b564a9e44 100644
--- a/src/plugins/android/createandroidmanifestwizard.cpp
+++ b/src/plugins/android/createandroidmanifestwizard.cpp
@@ -232,7 +232,7 @@ CreateAndroidManifestWizard::CreateAndroidManifestWizard(BuildSystem *buildSyste
 
     const QList<BuildTargetInfo> buildTargets = buildSystem->applicationTargets();
     QtSupport::QtVersion *version = QtSupport::QtKitAspect::qtVersion(buildSystem->kit());
-    m_copyGradle = version && version->qtVersion() >= QtSupport::QtVersionNumber(5, 4, 0);
+    m_copyGradle = version && version->qtVersion() >= QVersionNumber(5, 4, 0);
 
     if (buildTargets.isEmpty()) {
         // oh uhm can't create anything
@@ -281,7 +281,7 @@ void CreateAndroidManifestWizard::createAndroidTemplateFiles()
     QtSupport::QtVersion *version = QtSupport::QtKitAspect::qtVersion(target->kit());
     if (!version)
         return;
-    if (version->qtVersion() < QtSupport::QtVersionNumber(5, 4, 0)) {
+    if (version->qtVersion() < QVersionNumber(5, 4, 0)) {
         FileUtils::copyRecursively(version->prefix() / "src/android/java/AndroidManifest.xml",
                                    m_directory / "AndroidManifest.xml",
                                    nullptr,
diff --git a/src/plugins/cmakeprojectmanager/cmakebuildconfiguration.cpp b/src/plugins/cmakeprojectmanager/cmakebuildconfiguration.cpp
index c2ba8a19307..91e1cd80479 100644
--- a/src/plugins/cmakeprojectmanager/cmakebuildconfiguration.cpp
+++ b/src/plugins/cmakeprojectmanager/cmakebuildconfiguration.cpp
@@ -1469,9 +1469,9 @@ CMakeBuildConfiguration::CMakeBuildConfiguration(Target *target, Id id)
 
             auto sdkLocation = bs->data(Android::Constants::SdkLocation).value<FilePath>();
 
-            if (qt && qt->qtVersion() >= QtSupport::QtVersionNumber{6, 0, 0}) {
+            if (qt && qt->qtVersion() >= QVersionNumber(6, 0, 0)) {
                 // Don't build apk under ALL target because Qt Creator will handle it
-                if (qt->qtVersion() >= QtSupport::QtVersionNumber{6, 1, 0})
+                if (qt->qtVersion() >= QVersionNumber(6, 1, 0))
                     cmd.addArg("-DQT_NO_GLOBAL_APK_TARGET_PART_OF_ALL:BOOL=ON");
                 cmd.addArg("-DQT_HOST_PATH:PATH=%{Qt:QT_HOST_PREFIX}");
                 cmd.addArg("-DANDROID_SDK_ROOT:PATH=" + sdkLocation.path());
@@ -1482,7 +1482,7 @@ CMakeBuildConfiguration::CMakeBuildConfiguration(Target *target, Id id)
 
         const IDevice::ConstPtr device = DeviceKitAspect::device(k);
         if (CMakeBuildConfiguration::isIos(k)) {
-            if (qt && qt->qtVersion().majorVersion >= 6) {
+            if (qt && qt->qtVersion().majorVersion() >= 6) {
                 // TODO it would be better if we could set
                 // CMAKE_SYSTEM_NAME=iOS and CMAKE_XCODE_ATTRIBUTE_ONLY_ACTIVE_ARCH=YES
                 // and build with "cmake --build . -- -arch <arch>" instead of setting the architecture
@@ -1507,7 +1507,7 @@ CMakeBuildConfiguration::CMakeBuildConfiguration(Target *target, Id id)
         }
 
         if (isWebAssembly(k) || isQnx(k) || isWindowsARM64(k)) {
-            if (qt && qt->qtVersion().majorVersion >= 6)
+            if (qt && qt->qtVersion().majorVersion() >= 6)
                 cmd.addArg(CMAKE_QT6_TOOLCHAIN_FILE_ARG);
         }
 
diff --git a/src/plugins/cmakeprojectmanager/cmakekitinformation.cpp b/src/plugins/cmakeprojectmanager/cmakekitinformation.cpp
index 6be2257c23b..1fa255809e2 100644
--- a/src/plugins/cmakeprojectmanager/cmakekitinformation.cpp
+++ b/src/plugins/cmakeprojectmanager/cmakekitinformation.cpp
@@ -1157,7 +1157,7 @@ Tasks CMakeConfigurationKitAspect::validate(const Kit *k) const
     const ToolChain *const tcCxx = ToolChainKitAspect::cxxToolChain(k);
     const CMakeConfig config = configuration(k);
 
-    const bool isQt4 = version && version->qtVersion() < QtSupport::QtVersionNumber(5, 0, 0);
+    const bool isQt4 = version && version->qtVersion() < QVersionNumber(5, 0, 0);
     FilePath qmakePath; // This is relative to the cmake used for building.
     QStringList qtInstallDirs; // This is relativ to the cmake used for building.
     FilePath tcCPath;
diff --git a/src/plugins/debugger/debuggerruncontrol.cpp b/src/plugins/debugger/debuggerruncontrol.cpp
index e394cd6ee6e..ef045c2abbd 100644
--- a/src/plugins/debugger/debuggerruncontrol.cpp
+++ b/src/plugins/debugger/debuggerruncontrol.cpp
@@ -925,10 +925,10 @@ DebuggerRunTool::DebuggerRunTool(RunControl *runControl, AllowTerminal allowTerm
 
     m_runParameters.dumperPath = Core::ICore::resourcePath("debugger/");
     if (QtSupport::QtVersion *baseQtVersion = QtSupport::QtKitAspect::qtVersion(kit)) {
-        QtSupport::QtVersionNumber qtVersion = baseQtVersion->qtVersion();
-        m_runParameters.fallbackQtVersion = 0x10000 * int(qtVersion.majorVersion)
-                                            + 0x100 * int(qtVersion.minorVersion)
-                                            + int(qtVersion.patchVersion);
+        const QVersionNumber qtVersion = baseQtVersion->qtVersion();
+        m_runParameters.fallbackQtVersion = 0x10000 * qtVersion.majorVersion()
+                                            + 0x100 * qtVersion.minorVersion()
+                                            + qtVersion.microVersion();
     }
 }
 
diff --git a/src/plugins/qmakeprojectmanager/qmakebuildconfiguration.cpp b/src/plugins/qmakeprojectmanager/qmakebuildconfiguration.cpp
index c3939289ef6..9dc9d3a90e1 100644
--- a/src/plugins/qmakeprojectmanager/qmakebuildconfiguration.cpp
+++ b/src/plugins/qmakeprojectmanager/qmakebuildconfiguration.cpp
@@ -781,7 +781,7 @@ QmakeBuildConfigurationFactory::QmakeBuildConfigurationFactory()
 
         addBuild(BuildConfiguration::Debug);
         addBuild(BuildConfiguration::Release);
-        if (qtVersion && qtVersion->qtVersion().majorVersion > 4)
+        if (qtVersion && qtVersion->qtVersion().majorVersion() > 4)
             addBuild(BuildConfiguration::Profile);
 
         return result;
diff --git a/src/plugins/qmakeprojectmanager/qmakestep.cpp b/src/plugins/qmakeprojectmanager/qmakestep.cpp
index 75a81555977..79ed69b1848 100644
--- a/src/plugins/qmakeprojectmanager/qmakestep.cpp
+++ b/src/plugins/qmakeprojectmanager/qmakestep.cpp
@@ -120,7 +120,7 @@ QString QMakeStep::allArguments(const QtVersion *v, ArgumentFlags flags) const
     else
         arguments << project()->projectFilePath().toUserOutput();
 
-    if (v->qtVersion() < QtVersionNumber(5, 0, 0))
+    if (v->qtVersion() < QVersionNumber(5, 0, 0))
         arguments << "-r";
     bool userProvidedMkspec = false;
     for (ProcessArgs::ConstArgIterator ait(userArguments()); ait.next(); ) {
@@ -194,7 +194,7 @@ bool QMakeStep::init()
         workingDirectory = qmakeBc->buildDirectory();
 
     m_qmakeCommand = CommandLine{qtVersion->qmakeFilePath(), allArguments(qtVersion), CommandLine::Raw};
-    m_runMakeQmake = (qtVersion->qtVersion() >= QtVersionNumber(5, 0 ,0));
+    m_runMakeQmake = (qtVersion->qtVersion() >= QVersionNumber(5, 0 ,0));
 
     // The Makefile is used by qmake and make on the build device, from that
     // perspective it is local.
@@ -427,7 +427,7 @@ QString QMakeStep::effectiveQMakeCall() const
         QmakeBuildConfiguration *qmakeBc = qmakeBuildConfiguration();
         const FilePath makefile = qmakeBc ? qmakeBc->makefile() : FilePath();
         result += ' ' + allArguments(qtVersion, ArgumentFlag::Expand);
-        if (qtVersion->qtVersion() >= QtVersionNumber(5, 0, 0))
+        if (qtVersion->qtVersion() >= QVersionNumber(5, 0, 0))
             result.append(QString(" && %1 %2").arg(make.path()).arg(makeArguments(makefile.path())));
     }
     return result;
diff --git a/src/plugins/qmldesigner/designercore/imagecache/meshimagecachecollector.cpp b/src/plugins/qmldesigner/designercore/imagecache/meshimagecachecollector.cpp
index 6af9eabf7c9..88aa4efd409 100644
--- a/src/plugins/qmldesigner/designercore/imagecache/meshimagecachecollector.cpp
+++ b/src/plugins/qmldesigner/designercore/imagecache/meshimagecachecollector.cpp
@@ -36,7 +36,7 @@ void MeshImageCacheCollector::start(Utils::SmallStringView name,
         QString qtQuickVersion;
         QString qtQuick3DVersion;
         QtSupport::QtVersion *qtVersion = QtSupport::QtKitAspect::qtVersion(target()->kit());
-        if (qtVersion && qtVersion->qtVersion() < QtSupport::QtVersionNumber(6, 0, 0)) {
+        if (qtVersion && qtVersion->qtVersion() < QVersionNumber(6, 0, 0)) {
             qtQuickVersion = "2.15";
             qtQuick3DVersion = "1.15";
         }
diff --git a/src/plugins/qmldesigner/designercore/instances/puppetcreator.cpp b/src/plugins/qmldesigner/designercore/instances/puppetcreator.cpp
index 4b439114305..9e66f9e04aa 100644
--- a/src/plugins/qmldesigner/designercore/instances/puppetcreator.cpp
+++ b/src/plugins/qmldesigner/designercore/instances/puppetcreator.cpp
@@ -666,9 +666,9 @@ bool PuppetCreator::checkPuppetIsReady(const QString &puppetPath) const
     return false;
 }
 
-static bool nonEarlyQt5Version(const QtSupport::QtVersionNumber &currentQtVersionNumber)
+static bool nonEarlyQt5Version(const QVersionNumber &currentQtVersionNumber)
 {
-    return currentQtVersionNumber >= QtSupport::QtVersionNumber(5, 2, 0) || currentQtVersionNumber < QtSupport::QtVersionNumber(5, 0, 0);
+    return currentQtVersionNumber >= QVersionNumber(5, 2, 0) || currentQtVersionNumber < QVersionNumber(5, 0, 0);
 }
 
 bool PuppetCreator::qtIsSupported() const
diff --git a/src/plugins/qmldesigner/designercore/model/texttomodelmerger.cpp b/src/plugins/qmldesigner/designercore/model/texttomodelmerger.cpp
index fe1a2431a3b..8617d009c42 100644
--- a/src/plugins/qmldesigner/designercore/model/texttomodelmerger.cpp
+++ b/src/plugins/qmldesigner/designercore/model/texttomodelmerger.cpp
@@ -2250,7 +2250,7 @@ void TextToModelMerger::collectImportErrors(QList<DocumentMessage> *errors)
                     if (currentQtVersion && currentQtVersion->isValid()) {
                         const bool qt6import = import.version().startsWith("6");
 
-                        if (currentQtVersion->qtVersion().majorVersion == 5
+                        if (currentQtVersion->qtVersion().majorVersion() == 5
                             && (m_hasVersionlessImport || qt6import)) {
                             const QmlJS::DiagnosticMessage diagnosticMessage(
                                 QmlJS::Severity::Error,
diff --git a/src/plugins/qmlprofiler/qmlprofilerruncontrol.cpp b/src/plugins/qmlprofiler/qmlprofilerruncontrol.cpp
index 41d8b97d11c..d8294ca03aa 100644
--- a/src/plugins/qmlprofiler/qmlprofilerruncontrol.cpp
+++ b/src/plugins/qmlprofiler/qmlprofilerruncontrol.cpp
@@ -184,7 +184,7 @@ static QUrl localServerUrl(RunControl *runControl)
     Kit *kit = runControl->kit();
     const QtSupport::QtVersion *version = QtSupport::QtKitAspect::qtVersion(kit);
     if (version) {
-        if (version->qtVersion() >= QtSupport::QtVersionNumber(5, 6, 0))
+        if (version->qtVersion() >= QVersionNumber(5, 6, 0))
             serverUrl = Utils::urlFromLocalSocket();
         else
             serverUrl = Utils::urlFromLocalHostAndFreePort();
diff --git a/src/plugins/qmlprojectmanager/qmlproject.cpp b/src/plugins/qmlprojectmanager/qmlproject.cpp
index fcb83a6cbf8..0786e2b5805 100644
--- a/src/plugins/qmlprojectmanager/qmlproject.cpp
+++ b/src/plugins/qmlprojectmanager/qmlproject.cpp
@@ -532,7 +532,7 @@ Tasks QmlProject::projectIssues(const Kit *k) const
     if (dev.isNull())
         result.append(createProjectTask(Task::TaskType::Error, tr("Kit has no device.")));
 
-    if (version && version->qtVersion() < QtSupport::QtVersionNumber(5, 0, 0))
+    if (version && version->qtVersion() < QVersionNumber(5, 0, 0))
         result.append(createProjectTask(Task::TaskType::Error, tr("Qt version is too old.")));
 
     if (dev.isNull() || !version)
@@ -593,7 +593,7 @@ Project::RestoreResult QmlProject::fromMap(const QVariantMap &map, QString *erro
                           if (k->isReplacementKit())
                               return false;
                           QtSupport::QtVersion *version = QtSupport::QtKitAspect::qtVersion(k);
-                          return (version && version->qtVersion().majorVersion == qtMajorVersion);
+                          return (version && version->qtVersion().majorVersion() == qtMajorVersion);
                       });
                 if (!qtVersionkits.isEmpty()) {
                     if (qtVersionkits.contains(KitManager::defaultKit()))
diff --git a/src/plugins/qmlprojectmanager/qmlprojectrunconfiguration.cpp b/src/plugins/qmlprojectmanager/qmlprojectrunconfiguration.cpp
index b60023bf66a..3e5d648d520 100644
--- a/src/plugins/qmlprojectmanager/qmlprojectrunconfiguration.cpp
+++ b/src/plugins/qmlprojectmanager/qmlprojectrunconfiguration.cpp
@@ -245,7 +245,7 @@ void QmlProjectRunConfiguration::createQtVersionAspect()
             m_qtversionAspect->addOption(tr("Qt 5"));
             m_qtversionAspect->addOption(tr("Qt 6"));
 
-            const int valueForVersion = version->qtVersion().majorVersion == 6 ? 1 : 0;
+            const int valueForVersion = version->qtVersion().majorVersion() == 6 ? 1 : 0;
 
             m_qtversionAspect->setValue(valueForVersion);
 
@@ -260,7 +260,7 @@ void QmlProjectRunConfiguration::createQtVersionAspect()
 
                 const QList<Kit *> kits = Utils::filtered(KitManager::kits(), [&](const Kit *k) {
                     QtSupport::QtVersion *version = QtSupport::QtKitAspect::qtVersion(k);
-                    return (version && version->qtVersion().majorVersion == preferedQtVersion)
+                    return (version && version->qtVersion().majorVersion() == preferedQtVersion)
                            && DeviceTypeKitAspect::deviceTypeId(k)
                                   == ProjectExplorer::Constants::DESKTOP_DEVICE_TYPE;
                 });
diff --git a/src/plugins/qtsupport/baseqtversion.cpp b/src/plugins/qtsupport/baseqtversion.cpp
index 8bef5b61c0e..9c86ce1c72c 100644
--- a/src/plugins/qtsupport/baseqtversion.cpp
+++ b/src/plugins/qtsupport/baseqtversion.cpp
@@ -144,6 +144,12 @@ static QSet<Id> versionedIds(const QByteArray &prefix, int major, int minor)
     return result;
 }
 
+static QSet<Id> versionedIds(const QVersionNumber &version)
+{
+    return versionedIds(Constants::FEATURE_QT_PREFIX,
+                        version.majorVersion(), version.minorVersion());
+}
+
 // Wrapper to make the std::unique_ptr<Utils::MacroExpander> "copyable":
 class MacroExpanderWrapper
 {
@@ -242,78 +248,6 @@ MacroExpander *MacroExpanderWrapper::macroExpander(const QtVersion *qtversion) c
 
 } // Internal
 
-///////////////
-// QtVersionNumber
-///////////////
-QtVersionNumber::QtVersionNumber(int ma, int mi, int p)
-    : majorVersion(ma), minorVersion(mi), patchVersion(p)
-{ }
-
-QtVersionNumber::QtVersionNumber(const QString &versionString)
-{
-    if (::sscanf(versionString.toLatin1().constData(), "%d.%d.%d",
-           &majorVersion, &minorVersion, &patchVersion) != 3)
-        majorVersion = minorVersion = patchVersion = -1;
-}
-
-QSet<Id> QtVersionNumber::features() const
-{
-    return versionedIds(Constants::FEATURE_QT_PREFIX, majorVersion, minorVersion);
-}
-
-bool QtVersionNumber::matches(int major, int minor, int patch) const
-{
-    if (major < 0)
-        return true;
-    if (major != majorVersion)
-        return false;
-
-    if (minor < 0)
-        return true;
-    if (minor != minorVersion)
-        return false;
-
-    if (patch < 0)
-        return true;
-    return (patch == patchVersion);
-}
-
-bool QtVersionNumber::operator <(const QtVersionNumber &b) const
-{
-    if (majorVersion != b.majorVersion)
-        return majorVersion < b.majorVersion;
-    if (minorVersion != b.minorVersion)
-        return minorVersion < b.minorVersion;
-    return patchVersion < b.patchVersion;
-}
-
-bool QtVersionNumber::operator >(const QtVersionNumber &b) const
-{
-    return b < *this;
-}
-
-bool QtVersionNumber::operator ==(const QtVersionNumber &b) const
-{
-    return majorVersion == b.majorVersion
-            && minorVersion == b.minorVersion
-            && patchVersion == b.patchVersion;
-}
-
-bool QtVersionNumber::operator !=(const QtVersionNumber &b) const
-{
-    return !(*this == b);
-}
-
-bool QtVersionNumber::operator <=(const QtVersionNumber &b) const
-{
-    return !(*this > b);
-}
-
-bool QtVersionNumber::operator >=(const QtVersionNumber &b) const
-{
-    return b <= *this;
-}
-
 ///////////////
 // QtVersion
 ///////////////
@@ -358,46 +292,46 @@ QString QtVersion::defaultUnexpandedDisplayName() const
 
 QSet<Id> QtVersion::availableFeatures() const
 {
-    QSet<Id> features = qtVersion().features(); // Qt Version features
+    QSet<Id> features = versionedIds(qtVersion()); // Qt Version features
 
     features.insert(Constants::FEATURE_QWIDGETS);
     features.insert(Constants::FEATURE_QT_WEBKIT);
     features.insert(Constants::FEATURE_QT_CONSOLE);
 
-    if (qtVersion() < QtVersionNumber(4, 7, 0))
+    if (qtVersion() < QVersionNumber(4, 7, 0))
         return features;
 
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_PREFIX, 1, 0));
 
-    if (qtVersion().matches(4, 7, 0))
+    if (qtVersion() == QVersionNumber(4, 7, 0))
         return features;
 
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_PREFIX, 1, 1));
 
-    if (qtVersion().matches(4))
+    if (QVersionNumber(4).isPrefixOf(qtVersion()))
         return features;
 
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_PREFIX, 2, 0));
 
-    if (qtVersion().matches(5, 0))
+    if (QVersionNumber(5, 0).isPrefixOf(qtVersion()))
         return features;
 
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_PREFIX, 2, 1));
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_CONTROLS_PREFIX, 1, 0));
 
-    if (qtVersion().matches(5, 1))
+    if (QVersionNumber(5, 1).isPrefixOf(qtVersion()))
         return features;
 
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_PREFIX, 2, 2));
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_CONTROLS_PREFIX, 1, 1));
 
-    if (qtVersion().matches(5, 2))
+    if (QVersionNumber(5, 2).isPrefixOf(qtVersion()))
         return features;
 
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_PREFIX, 2, 3));
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_CONTROLS_PREFIX, 1, 2));
 
-    if (qtVersion().matches(5, 3))
+    if (QVersionNumber(5, 3).isPrefixOf(qtVersion()))
         return features;
 
     features.insert(Constants::FEATURE_QT_QUICK_UI_FILES);
@@ -405,7 +339,7 @@ QSet<Id> QtVersion::availableFeatures() const
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_PREFIX, 2, 4));
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_CONTROLS_PREFIX, 1, 3));
 
-    if (qtVersion().matches(5, 4))
+    if (QVersionNumber(5, 4).isPrefixOf(qtVersion()))
         return features;
 
     features.insert(Constants::FEATURE_QT_3D);
@@ -414,7 +348,7 @@ QSet<Id> QtVersion::availableFeatures() const
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_CONTROLS_PREFIX, 1, 4));
     features.unite(versionedIds(Constants::FEATURE_QT_CANVAS3D_PREFIX, 1, 0));
 
-    if (qtVersion().matches(5, 5))
+    if (QVersionNumber(5, 5).isPrefixOf(qtVersion()))
         return features;
 
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_PREFIX, 2, 6));
@@ -422,62 +356,62 @@ QSet<Id> QtVersion::availableFeatures() const
     features.unite(versionedIds(Constants::FEATURE_QT_LABS_CONTROLS_PREFIX, 1, 0));
     features.unite(versionedIds(Constants::FEATURE_QT_CANVAS3D_PREFIX, 1, 1));
 
-    if (qtVersion().matches(5, 6))
+    if (QVersionNumber(5, 6).isPrefixOf(qtVersion()))
         return features;
 
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_PREFIX, 2, 7));
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_CONTROLS_2_PREFIX, 2, 0));
     features.subtract(versionedIds(Constants::FEATURE_QT_LABS_CONTROLS_PREFIX, 1, 0));
 
-    if (qtVersion().matches(5, 7))
+    if (QVersionNumber(5, 7).isPrefixOf(qtVersion()))
         return features;
 
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_PREFIX, 2, 8));
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_CONTROLS_2_PREFIX, 2, 1));
 
-    if (qtVersion().matches(5, 8))
+    if (QVersionNumber(5, 8).isPrefixOf(qtVersion()))
         return features;
 
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_PREFIX, 2, 9));
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_CONTROLS_2_PREFIX, 2, 2));
 
-    if (qtVersion().matches(5, 9))
+    if (QVersionNumber(5, 9).isPrefixOf(qtVersion()))
         return features;
 
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_PREFIX, 2, 10));
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_CONTROLS_2_PREFIX, 2, 3));
 
-    if (qtVersion().matches(5, 10))
+    if (QVersionNumber(5, 10).isPrefixOf(qtVersion()))
         return features;
 
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_PREFIX, 2, 11));
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_CONTROLS_2_PREFIX, 2, 4));
 
-    if (qtVersion().matches(5, 11))
+    if (QVersionNumber(5, 11).isPrefixOf(qtVersion()))
         return features;
 
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_PREFIX, 2, 12));
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_CONTROLS_2_PREFIX, 2, 5));
 
-    if (qtVersion().matches(5, 12))
+    if (QVersionNumber(5, 12).isPrefixOf(qtVersion()))
         return features;
 
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_PREFIX, 2, 13));
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_CONTROLS_2_PREFIX, 2, 13));
 
-    if (qtVersion().matches(5, 13))
+    if (QVersionNumber(5, 13).isPrefixOf(qtVersion()))
         return features;
 
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_PREFIX, 2, 14));
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_CONTROLS_2_PREFIX, 2, 14));
 
-    if (qtVersion().matches(5, 14))
+    if (QVersionNumber(5, 14).isPrefixOf(qtVersion()))
         return features;
 
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_PREFIX, 2, 15));
     features.unite(versionedIds(Constants::FEATURE_QT_QUICK_CONTROLS_2_PREFIX, 2, 15));
 
-    if (qtVersion().matches(5, 15))
+    if (QVersionNumber(5, 15).isPrefixOf(qtVersion()))
         return features;
 
     // Qt 6 uses versionless imports
@@ -1026,7 +960,7 @@ FilePath QtVersion::qmlRuntimeFilePath() const
         return d->m_qmlRuntimePath;
 
     FilePath path = binPath();
-    if (qtVersion() >= QtVersionNumber(6, 2, 0))
+    if (qtVersion() >= QVersionNumber(6, 2, 0))
         path = path.pathAppended("qml").withExecutableSuffix();
     else
         path = path.pathAppended("qmlscene").withExecutableSuffix();
@@ -1053,7 +987,7 @@ FilePath QtVersion::qmlplugindumpFilePath() const
 FilePath QtVersionPrivate::findHostBinary(HostBinaries binary) const
 {
     FilePath baseDir;
-    if (q->qtVersion() < QtVersionNumber(5, 0, 0)) {
+    if (q->qtVersion() < QVersionNumber(5, 0, 0)) {
         baseDir = q->binPath();
     } else {
         switch (binary) {
@@ -1064,7 +998,7 @@ FilePath QtVersionPrivate::findHostBinary(HostBinaries binary) const
             break;
         case Rcc:
         case Uic:
-            if (q->qtVersion() >= QtVersionNumber(6, 1))
+            if (q->qtVersion() >= QVersionNumber(6, 1))
                 baseDir = q->hostLibexecPath();
             else
                 baseDir = q->hostBinPath();
@@ -1096,7 +1030,7 @@ FilePath QtVersionPrivate::findHostBinary(HostBinaries binary) const
         if (HostOsInfo::isWindowsHost()) {
             possibleCommands << "rcc.exe";
         } else {
-            const QString majorString = QString::number(q->qtVersion().majorVersion);
+            const QString majorString = QString::number(q->qtVersion().majorVersion());
             possibleCommands << ("rcc-qt" + majorString) << ("rcc" + majorString) << "rcc";
         }
         break;
@@ -1104,7 +1038,7 @@ FilePath QtVersionPrivate::findHostBinary(HostBinaries binary) const
         if (HostOsInfo::isWindowsHost()) {
             possibleCommands << "uic.exe";
         } else {
-            const QString majorString = QString::number(q->qtVersion().majorVersion);
+            const QString majorString = QString::number(q->qtVersion().majorVersion());
             possibleCommands << ("uic-qt" + majorString) << ("uic" + majorString) << "uic";
         }
         break;
@@ -1287,9 +1221,9 @@ QString QtVersion::qtVersionString() const
     return d->m_data.qtVersionString;
 }
 
-QtVersionNumber QtVersion::qtVersion() const
+QVersionNumber QtVersion::qtVersion() const
 {
-    return QtVersionNumber(qtVersionString());
+    return QVersionNumber::fromString(qtVersionString());
 }
 
 void QtVersionPrivate::updateVersionInfo()
@@ -1687,7 +1621,7 @@ void QtVersion::populateQmlFileFinder(FileInProjectFinder *finder, const Target
 QSet<Id> QtVersion::features() const
 {
     if (d->m_overrideFeatures.isEmpty())
-        return availableFeatures();
+        return versionedIds(qtVersion());
     return d->m_overrideFeatures;
 }
 
@@ -1717,8 +1651,8 @@ void QtVersion::setupQmakeRunEnvironment(Environment &env) const
 
 bool QtVersion::hasQmlDumpWithRelocatableFlag() const
 {
-    return ((qtVersion() > QtVersionNumber(4, 8, 4) && qtVersion() < QtVersionNumber(5, 0, 0))
-            || qtVersion() >= QtVersionNumber(5, 1, 0));
+    return ((qtVersion() > QVersionNumber(4, 8, 4) && qtVersion() < QVersionNumber(5, 0, 0))
+            || qtVersion() >= QVersionNumber(5, 1, 0));
 }
 
 Tasks QtVersion::reportIssuesImpl(const QString &proFile, const QString &buildDir) const
@@ -2019,7 +1953,7 @@ bool QtVersion::isQmlDebuggingSupported(QString *reason) const
         return false;
     }
 
-    if (qtVersion() < QtVersionNumber(5, 0, 0)) {
+    if (qtVersion() < QVersionNumber(5, 0, 0)) {
         if (reason)
             *reason = Tr::tr("Requires Qt 5.0.0 or newer.");
         return false;
@@ -2048,7 +1982,7 @@ bool QtVersion::isQtQuickCompilerSupported(QString *reason) const
         return false;
     }
 
-    if (qtVersion() < QtVersionNumber(5, 3, 0)) {
+    if (qtVersion() < QVersionNumber(5, 3, 0)) {
         if (reason)
             *reason = Tr::tr("Requires Qt 5.3.0 or newer.");
         return false;
diff --git a/src/plugins/qtsupport/baseqtversion.h b/src/plugins/qtsupport/baseqtversion.h
index 07a00cf4b51..95a874fb301 100644
--- a/src/plugins/qtsupport/baseqtversion.h
+++ b/src/plugins/qtsupport/baseqtversion.h
@@ -4,6 +4,7 @@
 #pragma once
 
 #include "qtsupport_global.h"
+#include "qversionnumber.h"
 
 #include <utils/fileutils.h>
 #include <utils/macroexpander.h>
@@ -36,28 +37,6 @@ namespace QtSupport {
 class QtConfigWidget;
 class QtVersion;
 
-class QTSUPPORT_EXPORT QtVersionNumber
-{
-public:
-    QtVersionNumber(int ma = -1, int mi = -1, int p = -1);
-    QtVersionNumber(const QString &versionString);
-
-    QSet<Utils::Id> features() const;
-
-    int majorVersion;
-    int minorVersion;
-    int patchVersion;
-
-    bool matches(int major = -1, int minor = -1, int patch = -1) const;
-
-    bool operator <(const QtVersionNumber &b) const;
-    bool operator <=(const QtVersionNumber &b) const;
-    bool operator >(const QtVersionNumber &b) const;
-    bool operator >=(const QtVersionNumber &b) const;
-    bool operator !=(const QtVersionNumber &b) const;
-    bool operator ==(const QtVersionNumber &b) const;
-};
-
 namespace Internal {
 class QtOptionsPageWidget;
 class QtVersionPrivate;
@@ -118,7 +97,7 @@ public:
     Utils::FilePath qmlplugindumpFilePath() const;
 
     QString qtVersionString() const;
-    QtVersionNumber qtVersion() const;
+    QVersionNumber qtVersion() const;
 
     QStringList qtSoPaths() const;
 
diff --git a/src/plugins/qtsupport/qtcppkitinfo.cpp b/src/plugins/qtsupport/qtcppkitinfo.cpp
index 09a6c9e71dc..cbb4b853838 100644
--- a/src/plugins/qtsupport/qtcppkitinfo.cpp
+++ b/src/plugins/qtsupport/qtcppkitinfo.cpp
@@ -12,9 +12,9 @@ CppKitInfo::CppKitInfo(ProjectExplorer::Kit *kit)
     : ProjectExplorer::KitInfo(kit)
 {
     if (kit && (qtVersion = QtKitAspect::qtVersion(kit))) {
-        if (qtVersion->qtVersion() < QtSupport::QtVersionNumber(5, 0, 0))
+        if (qtVersion->qtVersion() < QVersionNumber(5, 0, 0))
             projectPartQtVersion = Utils::QtMajorVersion::Qt4;
-        else if (qtVersion->qtVersion() < QtSupport::QtVersionNumber(6, 0, 0))
+        else if (qtVersion->qtVersion() < QVersionNumber(6, 0, 0))
             projectPartQtVersion = Utils::QtMajorVersion::Qt5;
         else
             projectPartQtVersion = Utils::QtMajorVersion::Qt6;
diff --git a/src/plugins/qtsupport/qtkitinformation.cpp b/src/plugins/qtsupport/qtkitinformation.cpp
index 7ccbde8d5a5..cdfed926c66 100644
--- a/src/plugins/qtsupport/qtkitinformation.cpp
+++ b/src/plugins/qtsupport/qtkitinformation.cpp
@@ -395,17 +395,17 @@ Kit::Predicate QtKitAspect::platformPredicate(Id platform)
 }
 
 Kit::Predicate QtKitAspect::qtVersionPredicate(const QSet<Id> &required,
-                                               const QtVersionNumber &min,
-                                               const QtVersionNumber &max)
+                                               const QVersionNumber &min,
+                                               const QVersionNumber &max)
 {
     return [required, min, max](const Kit *kit) -> bool {
         QtVersion *version = QtKitAspect::qtVersion(kit);
         if (!version)
             return false;
-        QtVersionNumber current = version->qtVersion();
-        if (min.majorVersion > -1 && current < min)
+        const QVersionNumber current = version->qtVersion();
+        if (min.majorVersion() > -1 && current < min)
             return false;
-        if (max.majorVersion > -1 && current > max)
+        if (max.majorVersion() > -1 && current > max)
             return false;
         return version->features().contains(required);
     };
diff --git a/src/plugins/qtsupport/qtkitinformation.h b/src/plugins/qtsupport/qtkitinformation.h
index a023e481b03..36cdbb7b715 100644
--- a/src/plugins/qtsupport/qtkitinformation.h
+++ b/src/plugins/qtsupport/qtkitinformation.h
@@ -46,8 +46,8 @@ public:
     static ProjectExplorer::Kit::Predicate platformPredicate(Utils::Id availablePlatforms);
     static ProjectExplorer::Kit::Predicate
     qtVersionPredicate(const QSet<Utils::Id> &required = QSet<Utils::Id>(),
-                       const QtVersionNumber &min = QtVersionNumber(0, 0, 0),
-                       const QtVersionNumber &max = QtVersionNumber(INT_MAX, INT_MAX, INT_MAX));
+                       const QVersionNumber &min = QVersionNumber(0, 0, 0),
+                       const QVersionNumber &max = QVersionNumber(INT_MAX, INT_MAX, INT_MAX));
 
     QSet<Utils::Id> supportedPlatforms(const ProjectExplorer::Kit *k) const override;
     QSet<Utils::Id> availableFeatures(const ProjectExplorer::Kit *k) const override;
diff --git a/src/plugins/qtsupport/qtprojectimporter.cpp b/src/plugins/qtsupport/qtprojectimporter.cpp
index f73fdd60baa..07042b33e83 100644
--- a/src/plugins/qtsupport/qtprojectimporter.cpp
+++ b/src/plugins/qtsupport/qtprojectimporter.cpp
@@ -253,7 +253,7 @@ void TestQtProjectImporter::deleteDirectoryData(void *directoryData) const
 static QStringList additionalFilesToCopy(const QtVersion *qt)
 {
     // This is a hack and only works with local, "standard" installations of Qt
-    const int major = qt->qtVersion().majorVersion;
+    const int major = qt->qtVersion().majorVersion();
     if (major >= 6) {
         if (HostOsInfo::isMacHost()) {
             return {"lib/QtCore.framework/Versions/A/QtCore"};
diff --git a/src/plugins/qtsupport/qtversionmanager.cpp b/src/plugins/qtsupport/qtversionmanager.cpp
index 19106d11207..dd39525d878 100644
--- a/src/plugins/qtsupport/qtversionmanager.cpp
+++ b/src/plugins/qtsupport/qtversionmanager.cpp
@@ -487,7 +487,7 @@ static QStringList documentationFiles(const QtVersions &vs, bool highestOnly = f
     QSet<QString> filePaths;
     const QtVersions versions = highestOnly ? QtVersionManager::sortVersions(vs) : vs;
     for (QtVersion *v : versions) {
-        const int majorVersion = v->qtVersion().majorVersion;
+        const int majorVersion = v->qtVersion().majorVersion();
         QSet<QString> &majorVersionFileNames = includedFileNames[majorVersion];
         for (const std::pair<Path, FileName> &file : documentationFiles(v)) {
             if (!highestOnly || !majorVersionFileNames.contains(file.second)) {
diff --git a/src/plugins/qtsupport/qtversions.cpp b/src/plugins/qtsupport/qtversions.cpp
index 357da1bf1c2..d28761a50e2 100644
--- a/src/plugins/qtsupport/qtversions.cpp
+++ b/src/plugins/qtsupport/qtversions.cpp
@@ -36,7 +36,7 @@ public:
 QStringList DesktopQtVersion::warningReason() const
 {
     QStringList ret = QtVersion::warningReason();
-    if (qtVersion() >= QtVersionNumber(5, 0, 0)) {
+    if (qtVersion() >= QVersionNumber(5, 0, 0)) {
         if (qmlRuntimeFilePath().isEmpty())
             ret << Tr::tr("No QML utility installed.");
     }
diff --git a/src/plugins/webassembly/webassemblyoptionspage.cpp b/src/plugins/webassembly/webassemblyoptionspage.cpp
index 46b08628661..85bcdf533e2 100644
--- a/src/plugins/webassembly/webassemblyoptionspage.cpp
+++ b/src/plugins/webassembly/webassemblyoptionspage.cpp
@@ -92,9 +92,8 @@ WebAssemblyOptionsWidget::WebAssemblyOptionsWidget()
     mainLayout->addStretch();
 
     {
-        const QString minimumSupportedQtVersion = QString::fromLatin1("%1.%2")
-                .arg(WebAssemblyQtVersion::minimumSupportedQtVersion().majorVersion)
-                .arg(WebAssemblyQtVersion::minimumSupportedQtVersion().minorVersion);
+        const QString minimumSupportedQtVersion =
+                WebAssemblyQtVersion::minimumSupportedQtVersion().toString();
         m_qtVersionDisplay = new InfoLabel(
                     tr("Note: %1 supports Qt %2 for WebAssembly and higher. "
                        "Your installed lower version(s) are not supported.")
diff --git a/src/plugins/webassembly/webassemblyqtversion.cpp b/src/plugins/webassembly/webassemblyqtversion.cpp
index 41d10062e95..bb76a4a7fdd 100644
--- a/src/plugins/webassembly/webassemblyqtversion.cpp
+++ b/src/plugins/webassembly/webassemblyqtversion.cpp
@@ -61,13 +61,12 @@ QString WebAssemblyQtVersion::invalidReason() const
 
     return tr("%1 does not support Qt for WebAssembly below version %2.")
             .arg(Core::ICore::versionString())
-            .arg(QVersionNumber(minimumSupportedQtVersion().majorVersion,
-                                minimumSupportedQtVersion().minorVersion).toString());
+            .arg(minimumSupportedQtVersion().toString());
 }
 
-const QtVersionNumber &WebAssemblyQtVersion::minimumSupportedQtVersion()
+const QVersionNumber &WebAssemblyQtVersion::minimumSupportedQtVersion()
 {
-    const static QtVersionNumber number(5, 15);
+    const static QVersionNumber number(5, 15);
     return number;
 }
 
diff --git a/src/plugins/webassembly/webassemblyqtversion.h b/src/plugins/webassembly/webassemblyqtversion.h
index e6bb6ee0b91..d7541154cd1 100644
--- a/src/plugins/webassembly/webassemblyqtversion.h
+++ b/src/plugins/webassembly/webassemblyqtversion.h
@@ -23,7 +23,7 @@ public:
     bool isValid() const override;
     QString invalidReason() const override;
 
-    static const QtSupport::QtVersionNumber &minimumSupportedQtVersion();
+    static const QVersionNumber &minimumSupportedQtVersion();
     static bool isQtVersionInstalled();
     static bool isUnsupportedQtVersionInstalled();
 };