diff --git a/src/Gui/Control.cpp b/src/Gui/Control.cpp
index f911e541dc..83e1b4084e 100644
--- a/src/Gui/Control.cpp
+++ b/src/Gui/Control.cpp
@@ -132,7 +132,8 @@ void ControlSingleton::showDialog(Gui::TaskView::TaskDialog *dlg)
         if (ActiveDialog == dlg)
             return; // dialog is already defined
         ActiveDialog = dlg;
-        connect(dlg, SIGNAL(aboutToBeDestroyed()), this, SLOT(closedDialog()));
+        connect(dlg, &TaskView::TaskDialog::aboutToBeDestroyed,
+                this, &ControlSingleton::closedDialog);
     }
     // not all workbenches have the combo view enabled
     else if (!_taskPanel) {
@@ -143,7 +144,7 @@ void ControlSingleton::showDialog(Gui::TaskView::TaskDialog *dlg)
         dw->setWidget(_taskPanel);
         _taskPanel->showDialog(dlg);
         getMainWindow()->addDockWidget(Qt::LeftDockWidgetArea, dw);
-        connect(dlg, SIGNAL(destroyed()), dw, SLOT(deleteLater()));
+        connect(dlg, &TaskView::TaskDialog::destroyed, dw, &ControlSingleton::deleteLater);
 
         // if we have the normal tree view available then just tabify with it
         QWidget* treeView = Gui::DockWindowManager::instance()->getDockWindow("Tree view");
diff --git a/src/Gui/DAGView/DAGModel.cpp b/src/Gui/DAGView/DAGModel.cpp
index 3332ce73cf..c4ec81da6a 100644
--- a/src/Gui/DAGView/DAGModel.cpp
+++ b/src/Gui/DAGView/DAGModel.cpp
@@ -134,8 +134,8 @@ Model::Model(QObject *parentIn, const Gui::Document &documentIn) : QGraphicsScen
   editingFinishedAction = new QAction(this);
   editingFinishedAction->setText(tr("Finish editing"));
   editingFinishedAction->setStatusTip(tr("Finish editing object"));
-  connect(this->editingFinishedAction, SIGNAL(triggered()),
-          this, SLOT(editingFinishedSlot()));
+  connect(this->editingFinishedAction, &QAction::triggered,
+          this, &Model::editingFinishedSlot);
 
   connectNewObject = documentIn.signalNewObject.connect(boost::bind(&Model::slotNewObject, this, bp::_1));
   connectDelObject = documentIn.signalDeletedObject.connect(boost::bind(&Model::slotDeleteObject, this, bp::_1));
diff --git a/src/Gui/DlgParameterImp.cpp b/src/Gui/DlgParameterImp.cpp
index 3b4457497b..9db1fe01c2 100644
--- a/src/Gui/DlgParameterImp.cpp
+++ b/src/Gui/DlgParameterImp.cpp
@@ -104,10 +104,9 @@ DlgParameterImp::DlgParameterImp( QWidget* parent,  Qt::WindowFlags fl )
     if (ui->parameterSet->count() < 2)
         ui->parameterSet->hide();
 
-    connect(ui->parameterSet, SIGNAL(activated(int)),
-            this, SLOT(onChangeParameterSet(int)));
-    connect(paramGroup, SIGNAL(currentItemChanged(QTreeWidgetItem*, QTreeWidgetItem*)),
-            this, SLOT(onGroupSelected(QTreeWidgetItem*)));
+    connect(ui->parameterSet, qOverload<int>(&QComboBox::activated),
+            this, &DlgParameterImp::onChangeParameterSet);
+    connect(paramGroup, &QTreeWidget::currentItemChanged, this, &DlgParameterImp::onGroupSelected);
     onGroupSelected(paramGroup->currentItem());
 
     // setup for function on_findGroup_changed:
diff --git a/src/Gui/DlgSettings3DViewImp.cpp b/src/Gui/DlgSettings3DViewImp.cpp
index 93c9423d63..4bcb3ad5ab 100644
--- a/src/Gui/DlgSettings3DViewImp.cpp
+++ b/src/Gui/DlgSettings3DViewImp.cpp
@@ -119,8 +119,8 @@ void DlgSettings3DViewImp::loadSettings()
     index = Base::clamp(index, 0, ui->comboAliasing->count()-1);
     ui->comboAliasing->setCurrentIndex(index);
     // connect after setting current item of the combo box
-    connect(ui->comboAliasing, SIGNAL(currentIndexChanged(int)),
-            this, SLOT(onAliasingChanged(int)));
+    connect(ui->comboAliasing, qOverload<int>(&QComboBox::currentIndexChanged),
+            this, &DlgSettings3DViewImp::onAliasingChanged);
 
     index = hGrp->GetInt("RenderCache", 0);
     ui->renderCache->setCurrentIndex(index);
diff --git a/src/Gui/DlgSettingsDocumentImp.cpp b/src/Gui/DlgSettingsDocumentImp.cpp
index 08a50a67f4..17f24da5bb 100644
--- a/src/Gui/DlgSettingsDocumentImp.cpp
+++ b/src/Gui/DlgSettingsDocumentImp.cpp
@@ -54,7 +54,8 @@ DlgSettingsDocumentImp::DlgSettingsDocumentImp( QWidget* parent )
     ui->prefCountBackupFiles->setMaximum(INT_MAX);
     ui->prefCompression->setMinimum(Z_NO_COMPRESSION);
     ui->prefCompression->setMaximum(Z_BEST_COMPRESSION);
-    connect( ui->prefLicenseType, SIGNAL(currentIndexChanged(int)), this, SLOT(onLicenseTypeChanged(int)) );
+    connect(ui->prefLicenseType, qOverload<int>(&QComboBox::currentIndexChanged),
+            this, &DlgSettingsDocumentImp::onLicenseTypeChanged);
 }
 
 /**
diff --git a/src/Gui/DlgUnitsCalculatorImp.cpp b/src/Gui/DlgUnitsCalculatorImp.cpp
index de783e19bc..5062e388e4 100644
--- a/src/Gui/DlgUnitsCalculatorImp.cpp
+++ b/src/Gui/DlgUnitsCalculatorImp.cpp
@@ -58,14 +58,13 @@ DlgUnitsCalculator::DlgUnitsCalculator( QWidget* parent, Qt::WindowFlags fl )
     }
 
     connect(ui->ValueInput, SIGNAL(valueChanged(Base::Quantity)), this, SLOT(valueChanged(Base::Quantity)));
-    connect(ui->ValueInput, SIGNAL(returnPressed()), this, SLOT(returnPressed()));
-    connect(ui->UnitInput, SIGNAL(textChanged(QString)), this, SLOT(textChanged(QString)));
-    connect(ui->UnitInput, SIGNAL(returnPressed()), this, SLOT(returnPressed()));
-
-    connect(ui->pushButton_Close, SIGNAL(clicked()), this, SLOT(accept()));
-    connect(ui->pushButton_Copy, SIGNAL(clicked()), this, SLOT(copy()));
-
-    connect(ui->ValueInput, SIGNAL(parseError(QString)), this, SLOT(parseError(QString)));
+    connect(ui->ValueInput, &InputField::returnPressed,
+            this, &DlgUnitsCalculator::returnPressed);
+    connect(ui->ValueInput, &InputField::parseError, this, &DlgUnitsCalculator::parseError);
+    connect(ui->UnitInput, &QLineEdit::textChanged, this, &DlgUnitsCalculator::textChanged);
+    connect(ui->UnitInput, &QLineEdit::returnPressed, this, &DlgUnitsCalculator::returnPressed);
+    connect(ui->pushButton_Close, &QPushButton::clicked, this, &DlgUnitsCalculator::accept);
+    connect(ui->pushButton_Copy, &QPushButton::clicked, this, &DlgUnitsCalculator::copy);
 
     ui->ValueInput->setParamGrpPath(QByteArray("User parameter:BaseApp/History/UnitsCalculator"));
     // set a default that also illustrates how the dialog works
diff --git a/src/Gui/PythonConsole.cpp b/src/Gui/PythonConsole.cpp
index 0362fc51dc..e152d5cdd7 100644
--- a/src/Gui/PythonConsole.cpp
+++ b/src/Gui/PythonConsole.cpp
@@ -954,8 +954,7 @@ void PythonConsole::changeEvent(QEvent *e)
     if (e->type() == QEvent::ParentChange) {
         auto dw = qobject_cast<QDockWidget*>(this->parentWidget());
         if (dw) {
-            connect(dw, SIGNAL(visibilityChanged(bool)),
-                    this, SLOT(visibilityChanged(bool)));
+            connect(dw, &QDockWidget::visibilityChanged, this, &PythonConsole::visibilityChanged);
         }
     }
     else if (e->type() == QEvent::StyleChange) {
diff --git a/src/Gui/PythonEditor.cpp b/src/Gui/PythonEditor.cpp
index 0d105c00b1..61a58f4f9c 100644
--- a/src/Gui/PythonEditor.cpp
+++ b/src/Gui/PythonEditor.cpp
@@ -78,10 +78,8 @@ PythonEditor::PythonEditor(QWidget* parent)
     auto uncomment = new QShortcut(this);
     uncomment->setKey(QKeySequence(QString::fromLatin1("ALT+U")));
 
-    connect(comment, SIGNAL(activated()),
-            this, SLOT(onComment()));
-    connect(uncomment, SIGNAL(activated()),
-            this, SLOT(onUncomment()));
+    connect(comment, &QShortcut::activated, this, &PythonEditor::onComment);
+    connect(uncomment, &QShortcut::activated, this, &PythonEditor::onUncomment);
 }
 
 /** Destroys the object and frees any allocated resources */