diff --git a/src/model/application_menu_config.cc b/src/model/application_menu_config.cc
index 869a739..fa5ee11 100644
--- a/src/model/application_menu_config.cc
+++ b/src/model/application_menu_config.cc
@@ -157,10 +157,16 @@ bool ApplicationMenuConfig::loadEntry(const QString &file) {
       return false;
     }
   }
-
+  // Qt::SkipEmptyParts was introduced in Qt 5.14
+#if QT_VERSION >= QT_VERSION_CHECK(5, 14, 0)
+  const QStringList categories =
+      desktopFile.entryMap("Desktop Entry")["Categories"]
+          .split(';', Qt::SkipEmptyParts);
+#else
   const QStringList categories =
       desktopFile.entryMap("Desktop Entry")["Categories"]
-          .split(';', QString::SkipEmptyParts);
+        .split(';', QString::SkipEmptyParts);
+#endif
   if (categories.isEmpty()) {
     return false;
   }
diff --git a/src/utils/task_helper.cc b/src/utils/task_helper.cc
index 7e65c16..6bedd83 100644
--- a/src/utils/task_helper.cc
+++ b/src/utils/task_helper.cc
@@ -122,7 +122,7 @@ bool TaskHelper::isValidTask(WId wId, int screen, bool currentDesktopOnly,
   }
 
   if (currentActivityOnly) {
-    KWindowInfo info(wId, 0, NET::WM2Activities);
+    KWindowInfo info(wId, QFlags<NET::Property>(), NET::WM2Activities);
     if (!info.valid() ||
         (!info.activities().empty() && !info.activities().contains(currentActivity_))) {
       return false;
@@ -133,7 +133,7 @@ bool TaskHelper::isValidTask(WId wId, int screen, bool currentDesktopOnly,
 }
 
 /* static */ TaskInfo TaskHelper::getBasicTaskInfo(WId wId) {
-  KWindowInfo info(wId, 0, NET::WM2WindowClass);
+  KWindowInfo info(wId, QFlags<NET::Property>(), NET::WM2WindowClass);
   const auto program = QString(info.windowClassName());
   return TaskInfo(wId, program);
 }
diff --git a/src/view/clock.cc b/src/view/clock.cc
index 6c1bebd..c7f63dc 100644
--- a/src/view/clock.cc
+++ b/src/view/clock.cc
@@ -86,7 +86,7 @@ void Clock::mousePressEvent(QMouseEvent *e) {
 }
 
 QString Clock::getLabel() const {
-  return QDate::currentDate().toString(Qt::SystemLocaleLongDate);
+  return QLocale::system().toString(QDate::currentDate(), QLocale::ShortFormat);
 }
 
 void Clock::updateTime() {
diff --git a/src/view/program.cc b/src/view/program.cc
index e798a48..9108c02 100644
--- a/src/view/program.cc
+++ b/src/view/program.cc
@@ -186,10 +186,60 @@ void Program::pinUnpin() {
   }
 }
 
-void Program::launch(const QString& command) {
-  if (!QProcess::startDetached(command)) {
+// Code from Qt 6.0 QProcess::splitCommand
+#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
+QStringList Program::splitCommand(QStringView command)
+{
+  QStringList args;
+  QString tmp;
+  int quoteCount = 0;
+  bool inQuote = false;
+
+  // handle quoting. tokens can be surrounded by double quotes
+  // "hello world". three consecutive double quotes represent
+  // the quote character itself.
+  for (int i = 0; i < command.size(); ++i) {
+    if (command.at(i) == QLatin1Char('"')) {
+      ++quoteCount;
+      if (quoteCount == 3) {
+        // third consecutive quote
+        quoteCount = 0;
+        tmp += command.at(i);
+      }
+      continue;
+    }
+    if (quoteCount) {
+      if (quoteCount == 1)
+        inQuote = !inQuote;
+      quoteCount = 0;
+    }
+    if (!inQuote && command.at(i).isSpace()) {
+      if (!tmp.isEmpty()) {
+        args += tmp;
+        tmp.clear();
+      }
+    } else {
+      tmp += command.at(i);
+    }
+  }
+  if (!tmp.isEmpty())
+    args += tmp;
+
+  return args;
+}
+#endif
+
+void Program::launch(const QString& commandLine) {
+  // Code from Qt 6.0 QProcess::startCommand
+#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
+  QStringList args = splitCommand(commandLine);
+#else
+  QStringList args = QProcess::splitCommand(commandLine);
+#endif
+  const QString program = args.takeFirst();
+  if (!QProcess::startDetached(program, args)) {
     KMessageBox::error(nullptr,
-        i18n("Could not run command: ") + command);
+        i18n("Could not run command: ") + commandLine);
   }
 }
 
diff --git a/src/view/program.h b/src/view/program.h
index 8513cdd..2390fd4 100644
--- a/src/view/program.h
+++ b/src/view/program.h
@@ -91,7 +91,10 @@ class Program : public QObject, public IconBasedDockItem {
   void pinUnpin();
 
   void launch();
-  static void launch(const QString& command);
+#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
+  static QStringList splitCommand(QStringView command);
+#endif
+  static void launch(const QString& commandLine);
   static void lockScreen() { launch(kLockScreenCommand); }
 
  private: