diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9f0497d..74fae56 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.3)
 project(KDbg)
-set(QT_MIN_VERSION "5.5.0")
-set(KF5_MIN_VERSION "5.2.0")
+set(QT_MIN_VERSION "6.4.2")
+set(KF6_MIN_VERSION "5.102.0")
 
 set(KDBG_VERSION 3.0.1)
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/kdbg/version.h.cmake ${CMAKE_CURRENT_BINARY_DIR}/kdbg/version.h)
@@ -9,11 +9,11 @@ configure_file(${CMAKE_CURRENT_SOURCE_DIR}/kdbg/version.h.cmake ${CMAKE_CURRENT_
 find_package(ECM REQUIRED NO_MODULE)
 set(CMAKE_MODULE_PATH ${ECM_MODULE_PATH} ${ECM_KDE_MODULE_DIR})
 
-find_package(Qt5 ${QT_MIN_VERSION} CONFIG REQUIRED COMPONENTS
-    Core Widgets
+find_package(Qt6 ${QT_MIN_VERSION} CONFIG REQUIRED COMPONENTS
+    Core Widgets Core5Compat
 )
 
-find_package(KF5 ${KF5_MIN_VERSION} REQUIRED COMPONENTS
+find_package(KF6 ${KF6_MIN_VERSION} REQUIRED COMPONENTS
     I18n
     Config
     IconThemes
diff --git a/kdbg/CMakeLists.txt b/kdbg/CMakeLists.txt
index a976c5a..ea85342 100644
--- a/kdbg/CMakeLists.txt
+++ b/kdbg/CMakeLists.txt
@@ -89,11 +89,11 @@ IF (HAVE_LIB_UTIL)
 ENDIF (HAVE_LIB_UTIL)
 
 target_link_libraries(kdbg
-    KF5::I18n
-    KF5::ConfigCore
-    KF5::IconThemes
-    KF5::XmlGui
-    KF5::WindowSystem
+    Qt6::Core5Compat
+    KF6::I18n
+    KF6::ConfigCore
+    KF6::IconThemes
+    KF6::XmlGui
     ${LIB_UTIL}
 )
 
diff --git a/kdbg/dbgdriver.cpp b/kdbg/dbgdriver.cpp
index 56232a1..3dc44e1 100644
--- a/kdbg/dbgdriver.cpp
+++ b/kdbg/dbgdriver.cpp
@@ -46,7 +46,7 @@ bool DebuggerDriver::startup(QString cmdStr)
     if (cmdStr.isEmpty())
 	cmdStr = defaultInvocation();
 
-    QStringList cmd = cmdStr.split(' ', QString::SkipEmptyParts);
+    QStringList cmd = cmdStr.split(' ', Qt::SkipEmptyParts);
     if (cmd.isEmpty())
 	return false;
     QString pgm = cmd.takeFirst();
diff --git a/kdbg/dbgdriver.h b/kdbg/dbgdriver.h
index 9c1e9be..2ee9445 100644
--- a/kdbg/dbgdriver.h
+++ b/kdbg/dbgdriver.h
@@ -18,7 +18,6 @@ class VarTree;
 class ExprValue;
 class ExprWnd;
 class KDebugger;
-class QStringList;
 
 
 /**
diff --git a/kdbg/dbgmainwnd.cpp b/kdbg/dbgmainwnd.cpp
index e0c061b..164f3f0 100644
--- a/kdbg/dbgmainwnd.cpp
+++ b/kdbg/dbgmainwnd.cpp
@@ -644,7 +644,7 @@ bool DebuggerMainWnd::debugProgram(const QString& exe, const QString& lang)
     if (!success)
     {
 	QString msg = i18n("`%1' is not a file or does not exist");
-	KMessageBox::sorry(this, msg.arg(exe));
+	KMessageBox::error(this, msg.arg(exe));
     }
     else
     {
@@ -712,7 +712,7 @@ bool DebuggerMainWnd::startDriver(const QString& executable, QString lang)
     {
 	// oops
 	QString msg = i18n("Don't know how to debug language `%1'");
-	KMessageBox::sorry(this, msg.arg(lang));
+	KMessageBox::error(this, msg.arg(lang));
 	return false;
     }
     if (typeid(*driver) == typeid(XsldbgDriver)) {
@@ -729,7 +729,7 @@ bool DebuggerMainWnd::startDriver(const QString& executable, QString lang)
 
 	QString msg = i18n("Could not start the debugger process.\n"
 			   "Please shut down KDbg and resolve the problem.");
-	KMessageBox::sorry(this, msg);
+	KMessageBox::error(this, msg);
     }
 
     return success;
@@ -1272,5 +1272,5 @@ void DebuggerMainWnd::slotExecArgs()
 
 void DebuggerMainWnd::slotConfigureKeys()
 {
-    KShortcutsDialog::configure(actionCollection());
+    KShortcutsDialog::showDialog(actionCollection(), KShortcutsEditor::LetterShortcutsDisallowed, this);
 }
diff --git a/kdbg/debugger.cpp b/kdbg/debugger.cpp
index 74d6715..88a1aea 100644
--- a/kdbg/debugger.cpp
+++ b/kdbg/debugger.cpp
@@ -775,7 +775,8 @@ void KDebugger::saveProgramSettings()
     gg.writeEntry(FileVersion, 1);
     gg.writeEntry(ProgramArgs, m_programArgs);
     gg.writeEntry(WorkingDirectory, m_programWD);
-    gg.writeEntry(OptionsSelected, m_boolOptions.toList());
+    QList<QString> boolOptions(m_boolOptions.begin(), m_boolOptions.end());
+    gg.writeEntry(OptionsSelected, boolOptions);
     gg.writeEntry(DebuggerCmdStr, m_debuggerCmd);
     gg.writeEntry(TTYLevelEntry, int(m_ttyLevel));
     gg.writeEntry(DisassemblyFlavor, m_flavor);
@@ -835,7 +836,8 @@ void KDebugger::restoreProgramSettings()
     // m_ttyLevel has been read in already
     QString pgmArgs = gg.readEntry(ProgramArgs);
     QString pgmWd = gg.readEntry(WorkingDirectory);
-    QSet<QString> boolOptions = QSet<QString>::fromList(gg.readEntry(OptionsSelected, QStringList()));
+    auto selectedOptions = gg.readEntry(OptionsSelected, QStringList());
+    QSet<QString> boolOptions(selectedOptions.begin(), selectedOptions.end());
     m_boolOptions.clear();
     m_flavor = gg.readEntry(DisassemblyFlavor, QString{});
 
@@ -905,8 +907,9 @@ QString KDebugger::readDebuggerCmd(const KConfigGroup& g)
 		"The settings for this program specify "
 		"the following debugger command:\n%1\n"
 		"Shall this command be used?");
-	    if (KMessageBox::warningYesNo(parentWidget(), msg.arg(debuggerCmd))
-		!= KMessageBox::Yes)
+	    if (KMessageBox::questionTwoActions(parentWidget(), msg.arg(debuggerCmd), i18n("Question"),
+						KGuiItem(i18nc("@action:button", "Yes"), QStringLiteral("dialog-ok")), KStandardGuiItem::cancel(), QString(), KMessageBox::Notify | KMessageBox::Dangerous)
+		!= KMessageBox::PrimaryAction)
 	    {
 		// don't use it
 		debuggerCmd = QString();
@@ -1076,7 +1079,7 @@ void KDebugger::parse(CmdQueueItem* cmd, const char* output)
 		emit updateStatusMessage();
 	} else {
 	    QString msg = m_d->driverName() + ": " + m_statusMessage;
-	    KMessageBox::sorry(parentWidget(), msg);
+	    KMessageBox::error(parentWidget(), msg);
 	    m_executable = "";
 	    m_corefile = "";		/* don't process core file */
 	    m_haveExecutable = false;
@@ -1093,7 +1096,7 @@ void KDebugger::parse(CmdQueueItem* cmd, const char* output)
 	} else {
 	    // report error
 	    QString msg = m_d->driverName() + ": " + QString(output);
-	    KMessageBox::sorry(parentWidget(), msg);
+	    KMessageBox::error(parentWidget(), msg);
 
 	    // if core file was loaded from command line, revert to info line main
 	    if (!cmd->m_byUser) {
diff --git a/kdbg/exprwnd.h b/kdbg/exprwnd.h
index f37b016..0f60ef7 100644
--- a/kdbg/exprwnd.h
+++ b/kdbg/exprwnd.h
@@ -16,7 +16,6 @@ class ProgramTypeTable;
 class TypeInfo;
 struct ExprValue;
 class ExprWnd;
-class QStringList;
 
 /*! \brief a variable's value is the tree of sub-variables */
 class VarTree : public QTreeWidgetItem
diff --git a/kdbg/gdbdriver.cpp b/kdbg/gdbdriver.cpp
index 75c766d..0043459 100644
--- a/kdbg/gdbdriver.cpp
+++ b/kdbg/gdbdriver.cpp
@@ -8,6 +8,7 @@
 #include "exprwnd.h"
 #include <QFileInfo>
 #include <QRegExp>
+#include <QRegularExpression>
 #include <QStringList>
 #include <klocalizedstring.h>		/* i18n */
 #include <ctype.h>
@@ -2387,7 +2388,7 @@ bool GdbDriver::parseFindType(const char* output, QString& type)
     if (strncmp(output, "const ", 6) == 0)
         output += 6;
     type = output;
-    type.replace(QRegExp("\\s+"), "");
+    type.replace(QRegularExpression("\\s+"), "");
     if (type.endsWith("&"))
         type.truncate(type.length() - 1);
     return true;
diff --git a/kdbg/pgmargs.h b/kdbg/pgmargs.h
index faf04b4..40c4238 100644
--- a/kdbg/pgmargs.h
+++ b/kdbg/pgmargs.h
@@ -13,8 +13,6 @@
 #include <map>
 #include "envvar.h"
 
-class QStringList;
-
 class PgmArgs : public QDialog, private Ui::PgmArgsBase
 {
     Q_OBJECT
diff --git a/kdbg/regwnd.cpp b/kdbg/regwnd.cpp
index 5378edf..9042ab8 100644
--- a/kdbg/regwnd.cpp
+++ b/kdbg/regwnd.cpp
@@ -6,7 +6,7 @@
 
 #include "regwnd.h"
 #include "dbgdriver.h"
-#include <klocalizedstring.h>		/* i18n */
+#include <KLazyLocalizedString>
 #include <QFontDatabase>
 #include <QMenu>
 #include <QRegExp>
@@ -63,28 +63,28 @@ class RegisterDisplay {
 // helper struct
 struct MenuPair
 {
-    const char* name;
+    KLazyLocalizedString name;
     uint mode;
-    bool isSeparator() { return name == 0; }
+    bool isSeparator() { return name.isEmpty(); }
 };
 
 static MenuPair menuitems[] = {
     // treat as
-    { I18N_NOOP("&GDB default"), RegisterDisplay::nada },
-    { I18N_NOOP("&Binary"),      RegisterDisplay::binary },
-    { I18N_NOOP("&Octal"),       RegisterDisplay::octal },
-    { I18N_NOOP("&Decimal"),     RegisterDisplay::decimal },
-    { I18N_NOOP("He&xadecimal"), RegisterDisplay::hex },
-    { I18N_NOOP("Real (&e)"),    RegisterDisplay::realE },
-    { I18N_NOOP("Real (&f)"),    RegisterDisplay::realF },
-    { I18N_NOOP("&Real (g)"),    RegisterDisplay::realG },
-    { 0, 0 },
-    { "8 bits",  RegisterDisplay::bits8 },
-    { "16 bits", RegisterDisplay::bits16 },
-    { "32 bits", RegisterDisplay::bits32 },
-    { "64 bits", RegisterDisplay::bits64 },
-    { "80 bits", RegisterDisplay::bits80 },
-    { "128 bits",RegisterDisplay::bits128 },
+    { kli18n("&GDB default"), RegisterDisplay::nada },
+    { kli18n("&Binary"),      RegisterDisplay::binary },
+    { kli18n("&Octal"),       RegisterDisplay::octal },
+    { kli18n("&Decimal"),     RegisterDisplay::decimal },
+    { kli18n("He&xadecimal"), RegisterDisplay::hex },
+    { kli18n("Real (&e)"),    RegisterDisplay::realE },
+    { kli18n("Real (&f)"),    RegisterDisplay::realF },
+    { kli18n("&Real (g)"),    RegisterDisplay::realG },
+    { KLazyLocalizedString(), 0 },
+    { kli18n("8 bits"),  RegisterDisplay::bits8 },
+    { kli18n("16 bits"), RegisterDisplay::bits16 },
+    { kli18n("32 bits"), RegisterDisplay::bits32 },
+    { kli18n("64 bits"), RegisterDisplay::bits64 },
+    { kli18n("80 bits"), RegisterDisplay::bits80 },
+    { kli18n("128 bits"),RegisterDisplay::bits128 },
 };
 
 uint RegisterDisplay::bitMap[] = {
@@ -427,7 +427,7 @@ RegisterView::RegisterView(QWidget* parent) :
 	if (menuitems[i].isSeparator())
 	    m_modemenu->addSeparator();
 	else {
-	    QAction* action = m_modemenu->addAction(i18n(menuitems[i].name));
+	    QAction* action = m_modemenu->addAction(menuitems[i].name.toString());
 	    action->setData(menuitems[i].mode);
 	    action->setCheckable(true);
 	}
diff --git a/kdbg/xsldbgdriver.cpp b/kdbg/xsldbgdriver.cpp
index 7ccd8da..8f56cfe 100644
--- a/kdbg/xsldbgdriver.cpp
+++ b/kdbg/xsldbgdriver.cpp
@@ -250,9 +250,9 @@ XsldbgDriver::commandFinished(CmdQueueItem * cmd)
 	  if (!::isErrorExpr(m_output.constData()))
             parseMarker();
 	  else{
-	    // This only shows an error for DCinfolocals 
-	    //  need to update KDebugger::handleRunCommand ? 
-	    KMessageBox::sorry(0L, m_output);
+	    // This only shows an error for DCinfolocals
+	    //  need to update KDebugger::handleRunCommand ?
+	    KMessageBox::error(0L, m_output);
 	  }
 	}
             break;