diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0bde601..be46ae7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -61,7 +61,6 @@ find_package(KF5 5.16 REQUIRED
 
 # use sane compile flags
 add_definitions(
-#   -fexceptions
   -DQT_USE_QSTRINGBUILDER
   -DQT_NO_CAST_TO_ASCII
   -DQT_NO_CAST_FROM_ASCII
diff --git a/src/gui/applyprogressdialog.cpp b/src/gui/applyprogressdialog.cpp
index 77261a4..be0f97e 100644
--- a/src/gui/applyprogressdialog.cpp
+++ b/src/gui/applyprogressdialog.cpp
@@ -126,9 +126,9 @@ void ApplyProgressDialog::setupConnections()
     connect(&timer(), SIGNAL(timeout()), SLOT(onSecondElapsed()));
     connect(&detailsWidget().buttonSave(), SIGNAL(clicked()), SLOT(saveReport()));
     connect(&detailsWidget().buttonBrowser(), SIGNAL(clicked()), SLOT(browserReport()));
-    connect(dialogButtonBox, SIGNAL(accepted()), this, SLOT(accept()));
-    connect(dialogButtonBox, SIGNAL(rejected()), this, SLOT(reject()));
-    connect(detailsButton, SIGNAL(clicked()), this, SLOT(toggleDetails()));
+    connect(dialogButtonBox, &QDialogButtonBox::accepted, this, &ApplyProgressDialog::accept);
+    connect(dialogButtonBox, &QDialogButtonBox::rejected, this, &ApplyProgressDialog::reject);
+    connect(detailsButton, &QPushButton::clicked, this, &ApplyProgressDialog::toggleDetails);
 }
 
 /** Shows the dialog */
@@ -277,8 +277,8 @@ void ApplyProgressDialog::onOpStarted(int num, Operation* op)
     dialogWidget().progressSub().setValue(0);
     dialogWidget().progressSub().setRange(0, op->totalProgress());
 
-    connect(op, SIGNAL(jobStarted(Job*, Operation*)), SLOT(onJobStarted(Job*, Operation*)));
-    connect(op, SIGNAL(jobFinished(Job*, Operation*)), SLOT(onJobFinished(Job*, Operation*)));
+    connect(op, &Operation::jobStarted, this, &ApplyProgressDialog::onJobStarted);
+    connect(op, &Operation::jobFinished, this, &ApplyProgressDialog::onJobFinished);
 }
 
 void ApplyProgressDialog::onJobStarted(Job* job, Operation* op)
diff --git a/src/gui/applyprogressdialog.h b/src/gui/applyprogressdialog.h
index 346c0a8..993f298 100644
--- a/src/gui/applyprogressdialog.h
+++ b/src/gui/applyprogressdialog.h
@@ -73,15 +73,16 @@ protected Q_SLOTS:
     void onOkButton();
     void onOpStarted(int num, Operation* op);
     void onOpFinished(int num, Operation* op);
-    void onJobStarted(Job* job, Operation* op);
-    void onJobFinished(Job* job, Operation* op);
     void onSecondElapsed();
     void saveReport();
-    void toggleDetails();
     void browserReport();
     void updateReport(bool force = false);
 
 protected:
+    void onJobStarted(Job* job, Operation* op);
+    void onJobFinished(Job* job, Operation* op);
+    void toggleDetails();
+
     void closeEvent(QCloseEvent* e) override;
     void keyPressEvent(QKeyEvent* e) override;
 
diff --git a/src/gui/createpartitiontabledialog.cpp b/src/gui/createpartitiontabledialog.cpp
index 5dd540c..2c1cb32 100644
--- a/src/gui/createpartitiontabledialog.cpp
+++ b/src/gui/createpartitiontabledialog.cpp
@@ -45,8 +45,8 @@ CreatePartitionTableDialog::CreatePartitionTableDialog(QWidget* parent, const De
     mainLayout->addWidget(dialogButtonBox);
 
     connect(&widget().radioMSDOS(), SIGNAL(toggled(bool)), SLOT(onMSDOSToggled(bool)));
-    connect(dialogButtonBox, SIGNAL(accepted()), this, SLOT(accept()));
-    connect(dialogButtonBox, SIGNAL(rejected()), this, SLOT(reject()));
+    connect(dialogButtonBox, &QDialogButtonBox::accepted, this, &CreatePartitionTableDialog::accept);
+    connect(dialogButtonBox, &QDialogButtonBox::rejected, this, &CreatePartitionTableDialog::reject);
 }
 
 PartitionTable::TableType CreatePartitionTableDialog::type() const
diff --git a/src/gui/devicepropsdialog.cpp b/src/gui/devicepropsdialog.cpp
index df2f9f9..c442c67 100644
--- a/src/gui/devicepropsdialog.cpp
+++ b/src/gui/devicepropsdialog.cpp
@@ -76,8 +76,8 @@ void DevicePropsDialog::setupDialog()
     okButton->setEnabled(false);
     cancelButton->setFocus();
     cancelButton->setDefault(true);
-    connect(dialogButtonBox, SIGNAL(accepted()), this, SLOT(accept()));
-    connect(dialogButtonBox, SIGNAL(rejected()), this, SLOT(reject()));
+    connect(dialogButtonBox, &QDialogButtonBox::accepted, this, &DevicePropsDialog::accept);
+    connect(dialogButtonBox, &QDialogButtonBox::rejected, this, &DevicePropsDialog::reject);
 
     QString type = QStringLiteral("---");
     QString maxPrimaries = QStringLiteral("---");
diff --git a/src/gui/filesystemsupportdialog.cpp b/src/gui/filesystemsupportdialog.cpp
index 5fd4d20..973d6de 100644
--- a/src/gui/filesystemsupportdialog.cpp
+++ b/src/gui/filesystemsupportdialog.cpp
@@ -107,7 +107,7 @@ void FileSystemSupportDialog::setupDialog()
 
 void FileSystemSupportDialog::setupConnections()
 {
-    connect(dialogButtonBox->button(QDialogButtonBox::Ok), SIGNAL(clicked()), SLOT(close()));
+    connect(dialogButtonBox->button(QDialogButtonBox::Ok), &QPushButton::clicked, this, &FileSystemSupportDialog::close);
     connect(&dialogWidget().buttonRescan(), SIGNAL(clicked()), SLOT(onButtonRescanClicked()));
 }
 
diff --git a/src/gui/mainwindow.cpp b/src/gui/mainwindow.cpp
index 6ca3260..385f376 100644
--- a/src/gui/mainwindow.cpp
+++ b/src/gui/mainwindow.cpp
@@ -115,7 +115,7 @@ void MainWindow::init()
 {
     treeLog().init();
 
-    connect(GlobalLog::instance(), SIGNAL(newMessage(Log::Level, const QString&)), &treeLog(), SLOT(onNewLogMessage(Log::Level, const QString&)));
+    connect(GlobalLog::instance(), &GlobalLog::newMessage, &treeLog(), &TreeLog::onNewLogMessage);
 
     setupActions();
     setupStatusBar();
@@ -657,7 +657,7 @@ void MainWindow::updateSeletedDeviceMenu()
         action->setCheckable(true);
         action->setChecked(d->deviceNode() == pmWidget().selectedDevice()->deviceNode());
         action->setData(d->deviceNode());
-        connect(action, SIGNAL(triggered(bool)), SLOT(onSelectedDeviceMenuTriggered(bool)));
+        connect(action, &QAction::triggered, this, &MainWindow::onSelectedDeviceMenuTriggered);
         devicesMenu->addAction(action);
     }
 }
diff --git a/src/gui/mainwindow.h b/src/gui/mainwindow.h
index 05eb78e..b269b04 100644
--- a/src/gui/mainwindow.h
+++ b/src/gui/mainwindow.h
@@ -211,6 +211,8 @@ protected:
         return *m_ScanProgressDialog;
     }
 
+    void onSelectedDeviceMenuTriggered(bool);
+
 protected Q_SLOTS:
     void on_m_PartitionManagerWidget_selectedPartitionChanged(const Partition* p);
     void on_m_PartitionManagerWidget_contextMenuRequested(const QPoint& pos);
@@ -251,7 +253,6 @@ protected Q_SLOTS:
 
     void onSmartStatusDevice();
     void onPropertiesDevice(const QString& device_node = QString());
-    void onSelectedDeviceMenuTriggered(bool);
 
 private:
     OperationStack* m_OperationStack;
diff --git a/src/gui/partitionmanagerwidget.cpp b/src/gui/partitionmanagerwidget.cpp
index 663a328..a9fecec 100644
--- a/src/gui/partitionmanagerwidget.cpp
+++ b/src/gui/partitionmanagerwidget.cpp
@@ -153,7 +153,7 @@ void PartitionManagerWidget::saveConfig() const
 
 void PartitionManagerWidget::setupConnections()
 {
-    connect(treePartitions().header(), SIGNAL(customContextMenuRequested(const QPoint&)), SLOT(onHeaderContextMenu(const QPoint&)));
+    connect(treePartitions().header(), &QHeaderView::customContextMenuRequested, this, &PartitionManagerWidget::onHeaderContextMenu);
 }
 
 void PartitionManagerWidget::clear()
diff --git a/src/gui/partitionmanagerwidget.h b/src/gui/partitionmanagerwidget.h
index 8c94ead..778526e 100644
--- a/src/gui/partitionmanagerwidget.h
+++ b/src/gui/partitionmanagerwidget.h
@@ -135,6 +135,8 @@ protected:
         return *m_TreePartitions;
     }
 
+    void onHeaderContextMenu(const QPoint& p);
+
 protected Q_SLOTS:
     void on_m_TreePartitions_currentItemChanged(QTreeWidgetItem* current, QTreeWidgetItem* previous);
     void on_m_TreePartitions_customContextMenuRequested(const QPoint& pos);
@@ -144,8 +146,6 @@ protected Q_SLOTS:
     void on_m_PartTableWidget_customContextMenuRequested(const QPoint& pos);
     void on_m_PartTableWidget_itemDoubleClicked();
 
-    void onHeaderContextMenu(const QPoint& p);
-
 private:
     OperationStack* m_OperationStack;
     Device* m_SelectedDevice;
diff --git a/src/gui/partpropsdialog.cpp b/src/gui/partpropsdialog.cpp
index 1a169b0..b0e29d5 100644
--- a/src/gui/partpropsdialog.cpp
+++ b/src/gui/partpropsdialog.cpp
@@ -107,8 +107,8 @@ void PartPropsDialog::setupDialog()
     okButton->setEnabled(false);
     cancelButton->setFocus();
     cancelButton->setDefault(true);
-    connect(dialogButtonBox, SIGNAL(accepted()), this, SLOT(accept()));
-    connect(dialogButtonBox, SIGNAL(rejected()), this, SLOT(reject()));
+    connect(dialogButtonBox, &QDialogButtonBox::accepted, this, &PartPropsDialog::accept);
+    connect(dialogButtonBox, &QDialogButtonBox::rejected, this, &PartPropsDialog::reject);
 
     dialogWidget().partWidget().init(&partition());
 
diff --git a/src/gui/sizedialogbase.cpp b/src/gui/sizedialogbase.cpp
index 8b01a9b..aefb137 100644
--- a/src/gui/sizedialogbase.cpp
+++ b/src/gui/sizedialogbase.cpp
@@ -71,9 +71,9 @@ SizeDialogBase::SizeDialogBase(QWidget* parent, Device& d, Partition& part, qint
     mainLayout->setSizeConstraint(QLayout::SetFixedSize);
     mainLayout->addWidget(dialogButtonBox);
 
-    connect(dialogButtonBox, SIGNAL(accepted()), this, SLOT(accept()));
-    connect(dialogButtonBox, SIGNAL(rejected()), this, SLOT(reject()));
-    connect(detailsButton, SIGNAL(clicked()), this, SLOT(toggleDetails()));
+    connect(dialogButtonBox, &QDialogButtonBox::accepted, this, &SizeDialogBase::accept);
+    connect(dialogButtonBox, &QDialogButtonBox::rejected, this, &SizeDialogBase::reject);
+    connect(detailsButton, &QPushButton::clicked, this, &SizeDialogBase::toggleDetails);
 }
 
 void SizeDialogBase::setupDialog()
diff --git a/src/gui/sizedialogbase.h b/src/gui/sizedialogbase.h
index 519ec00..bf61826 100644
--- a/src/gui/sizedialogbase.h
+++ b/src/gui/sizedialogbase.h
@@ -127,9 +127,9 @@ protected Q_SLOTS:
     void onSpinLastSectorChanged(double newLast);
     void onAlignToggled(bool);
 
+protected:
     void toggleDetails();
 
-protected:
     SizeDialogWidget* m_SizeDialogWidget;
     SizeDetailsWidget* m_SizeDetailsWidget;
     Device& m_Device;
diff --git a/src/gui/smartdialog.cpp b/src/gui/smartdialog.cpp
index 6d97519..7f6b93d 100644
--- a/src/gui/smartdialog.cpp
+++ b/src/gui/smartdialog.cpp
@@ -141,8 +141,8 @@ void SmartDialog::setupDialog()
 
 void SmartDialog::setupConnections()
 {
-    connect(buttonBox->button(QDialogButtonBox::Save), SIGNAL(clicked()), SLOT(saveSmartReport()));
-    connect(buttonBox->button(QDialogButtonBox::Close), SIGNAL(clicked()), SLOT(close()));
+    connect(buttonBox->button(QDialogButtonBox::Save), &QPushButton::clicked, this, &SmartDialog::saveSmartReport);
+    connect(buttonBox->button(QDialogButtonBox::Close), &QPushButton::clicked, this, &SmartDialog::close);
 }
 
 QString SmartDialog::toHtml() const
diff --git a/src/gui/smartdialog.h b/src/gui/smartdialog.h
index 2e51a84..da45cd8 100644
--- a/src/gui/smartdialog.h
+++ b/src/gui/smartdialog.h
@@ -38,17 +38,15 @@ class QDialogButtonBox;
 */
 class SmartDialog : public QDialog
 {
-    Q_OBJECT
     Q_DISABLE_COPY(SmartDialog)
 
 public:
     SmartDialog(QWidget* parent, Device& d);
     ~SmartDialog();
 
-protected Q_SLOTS:
+protected:
     void saveSmartReport();
 
-protected:
     void setupDialog();
     void setupConnections();
 
diff --git a/src/gui/smartdialogwidget.cpp b/src/gui/smartdialogwidget.cpp
index 655c24f..a63a69d 100644
--- a/src/gui/smartdialogwidget.cpp
+++ b/src/gui/smartdialogwidget.cpp
@@ -122,7 +122,7 @@ void SmartDialogWidget::saveConfig() const
 
 void SmartDialogWidget::setupConnections()
 {
-    connect(treeSmartAttributes().header(), SIGNAL(customContextMenuRequested(const QPoint&)), SLOT(onHeaderContextMenu(const QPoint&)));
+    connect(treeSmartAttributes().header(), &QHeaderView::customContextMenuRequested, this, &SmartDialogWidget::onHeaderContextMenu);
 }
 
 void SmartDialogWidget::onHeaderContextMenu(const QPoint& p)
diff --git a/src/gui/smartdialogwidget.h b/src/gui/smartdialogwidget.h
index 270eb93..4e6f094 100644
--- a/src/gui/smartdialogwidget.h
+++ b/src/gui/smartdialogwidget.h
@@ -29,8 +29,6 @@ class QPoint;
 */
 class SmartDialogWidget : public QWidget, public Ui::SmartDialogWidgetBase
 {
-    Q_OBJECT
-
 public:
     SmartDialogWidget(QWidget* parent);
     ~SmartDialogWidget();
@@ -95,8 +93,6 @@ protected:
     void setupConnections();
     void loadConfig();
     void saveConfig() const;
-
-protected Q_SLOTS:
     void onHeaderContextMenu(const QPoint& p);
 
 private:
diff --git a/src/gui/treelog.cpp b/src/gui/treelog.cpp
index fa89d92..14e9f05 100644
--- a/src/gui/treelog.cpp
+++ b/src/gui/treelog.cpp
@@ -51,7 +51,7 @@ TreeLog::TreeLog(QWidget* parent) :
     setupUi(this);
 
     treeLog().header()->setContextMenuPolicy(Qt::CustomContextMenu);
-    connect(treeLog().header(), SIGNAL(customContextMenuRequested(const QPoint&)), SLOT(onHeaderContextMenu(const QPoint&)));
+    connect(treeLog().header(), &QHeaderView::customContextMenuRequested, this, &TreeLog::onHeaderContextMenu);
 
 }
 
diff --git a/src/gui/treelog.h b/src/gui/treelog.h
index 679710a..ef09d64 100644
--- a/src/gui/treelog.h
+++ b/src/gui/treelog.h
@@ -44,15 +44,16 @@ Q_SIGNALS:
 
 public:
     void init();
+    void onNewLogMessage(Log::Level logLevel, const QString& s);
 
 protected Q_SLOTS:
-    void onNewLogMessage(Log::Level logLevel, const QString& s);
-    void onHeaderContextMenu(const QPoint& pos);
     void onClearLog();
     void onSaveLog();
     void on_m_TreeLog_customContextMenuRequested(const QPoint& pos);
 
 protected:
+    void onHeaderContextMenu(const QPoint& pos);
+
     QTreeWidget& treeLog() {
         Q_ASSERT(m_TreeLog);
         return *m_TreeLog;