diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,7 +4,7 @@
 set(PROJECT_VERSION "5.18.80")
 set(PROJECT_VERSION_MAJOR 5)
 
-set(QT_MIN_VERSION "5.12.0")
+set(QT_MIN_VERSION "5.14.0")
 set(KF5_MIN_VERSION "5.66.0")
 set(INSTALL_SDDM_THEME TRUE)
 find_package(Qt5 ${QT_MIN_VERSION} CONFIG REQUIRED COMPONENTS Widgets Quick QuickWidgets Concurrent Test Network)
diff --git a/gmenu-dbusmenu-proxy/main.cpp b/gmenu-dbusmenu-proxy/main.cpp
--- a/gmenu-dbusmenu-proxy/main.cpp
+++ b/gmenu-dbusmenu-proxy/main.cpp
@@ -18,7 +18,6 @@
  */
 
 #include <QGuiApplication>
-#include <QSessionManager>
 
 #include <KWindowSystem>
 
@@ -29,19 +28,14 @@
     qputenv("QT_QPA_PLATFORM", "xcb");
 
     QGuiApplication::setDesktopSettingsAware(false);
+    QCoreApplication::setAttribute(Qt::AA_DisableSessionManager);
 
     QGuiApplication app(argc, argv);
 
     if (!KWindowSystem::isPlatformX11()) {
         qFatal("qdbusmenuproxy is only useful XCB. Aborting");
     }
 
-    auto disableSessionManagement = [](QSessionManager &sm) {
-        sm.setRestartHint(QSessionManager::RestartNever);
-    };
-    QObject::connect(&app, &QGuiApplication::commitDataRequest, disableSessionManagement);
-    QObject::connect(&app, &QGuiApplication::saveStateRequest, disableSessionManagement);
-
     app.setQuitOnLastWindowClosed(false);
 
     MenuProxy proxy;
diff --git a/krunner/main.cpp b/krunner/main.cpp
--- a/krunner/main.cpp
+++ b/krunner/main.cpp
@@ -24,7 +24,6 @@
 #include <QUrl>
 #include <QDebug>
 #include <QQuickWindow>
-#include <QSessionManager>
 #include <QDBusMessage>
 #include <QDBusConnection>
 
@@ -44,6 +43,7 @@
     qunsetenv("QT_DEVICE_PIXEL_RATIO");
     QCommandLineParser parser;
     QCoreApplication::setAttribute(Qt::AA_DisableHighDpiScaling);
+    QCoreApplication::setAttribute(Qt::AA_DisableSessionManager);
 
     const bool qpaVariable = qEnvironmentVariableIsSet("QT_QPA_PLATFORM");
     KWorkSpace::detectPlatform(argc, argv);
@@ -91,14 +91,6 @@
 
     KDBusService service(KDBusService::Unique | KDBusService::StartupOption(parser.isSet(replaceOption) ? KDBusService::Replace : 0));
 
-    QGuiApplication::setFallbackSessionManagementEnabled(false);
-
-    auto disableSessionManagement = [](QSessionManager &sm) {
-        sm.setRestartHint(QSessionManager::RestartNever);
-    };
-    QObject::connect(&app, &QGuiApplication::commitDataRequest, disableSessionManagement);
-    QObject::connect(&app, &QGuiApplication::saveStateRequest, disableSessionManagement);
-
     View view;
 
     auto updateVisibility = [&]() {
diff --git a/shell/main.cpp b/shell/main.cpp
--- a/shell/main.cpp
+++ b/shell/main.cpp
@@ -21,7 +21,6 @@
 #include <QApplication>
 #include <QCommandLineParser>
 #include <QQuickWindow>
-#include <QSessionManager>
 #include <QDebug>
 #include <QProcess>
 #include <QMessageBox>
@@ -63,6 +62,7 @@
     } else {
         QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
     }
+    QCoreApplication::setAttribute(Qt::AA_DisableSessionManager);
 
     QQuickWindow::setDefaultAlphaBuffer(true);
 
@@ -139,14 +139,6 @@
     cliOptions.process(app);
     aboutData.processCommandLine(&cliOptions);
 
-    QGuiApplication::setFallbackSessionManagementEnabled(false);
-
-    auto disableSessionManagement = [](QSessionManager &sm) {
-        sm.setRestartHint(QSessionManager::RestartNever);
-    };
-    QObject::connect(&app, &QGuiApplication::commitDataRequest, disableSessionManagement);
-    QObject::connect(&app, &QGuiApplication::saveStateRequest, disableSessionManagement);
-
     ShellCorona* corona = new ShellCorona(&app);
     corona->setShell(cliOptions.value(shellPluginOption));
 
diff --git a/xembed-sni-proxy/main.cpp b/xembed-sni-proxy/main.cpp
--- a/xembed-sni-proxy/main.cpp
+++ b/xembed-sni-proxy/main.cpp
@@ -19,7 +19,6 @@
  */
 
 #include <QGuiApplication>
-#include <QSessionManager>
 
 #include "fdoselectionmanager.h"
 
@@ -42,19 +41,14 @@
     qputenv("QT_QPA_PLATFORM", "xcb");
 
     QGuiApplication::setDesktopSettingsAware(false);
+    QCoreApplication::setAttribute(Qt::AA_DisableSessionManager);
 
     QGuiApplication app(argc, argv);
 
     if (!KWindowSystem::isPlatformX11()) {
         qFatal("xembed-sni-proxy is only useful XCB. Aborting");
     }
 
-    auto disableSessionManagement = [](QSessionManager &sm) {
-        sm.setRestartHint(QSessionManager::RestartNever);
-    };
-    QObject::connect(&app, &QGuiApplication::commitDataRequest, disableSessionManagement);
-    QObject::connect(&app, &QGuiApplication::saveStateRequest, disableSessionManagement);
-
     app.setQuitOnLastWindowClosed(false);
 
     qDBusRegisterMetaType<KDbusImageStruct>();