diff --git a/antispam-virus/antispamwizard.cpp b/antispam-virus/antispamwizard.cpp
index a483d2640..a31519a18 100644
--- a/antispam-virus/antispamwizard.cpp
+++ b/antispam-virus/antispamwizard.cpp
@@ -935,8 +935,8 @@ ASWizInfoPage::ASWizInfoPage(AntiSpamWizard::WizardMode mode,
     mToolsList->setBatchSize(10);
     mToolsList->setSizePolicy(QSizePolicy(QSizePolicy::Expanding,  QSizePolicy::Maximum));
     layout->addWidget(mToolsList);
-    connect(mToolsList->selectionModel(), SIGNAL(selectionChanged(QItemSelection,QItemSelection)),
-            this, SLOT(processSelectionChange()));
+    connect(mToolsList->selectionModel(), &QItemSelectionModel::selectionChanged,
+            this, &ASWizInfoPage::processSelectionChange);
 
     mSelectionHint = new QLabel(this);
     mSelectionHint->clear();
diff --git a/configuredialog/configureagentswidget.cpp b/configuredialog/configureagentswidget.cpp
index 94097e05b..b9def8dc4 100644
--- a/configuredialog/configureagentswidget.cpp
+++ b/configuredialog/configureagentswidget.cpp
@@ -51,8 +51,8 @@ ConfigureAgentsWidget::ConfigureAgentsWidget(QWidget *parent)
     mDescription->enableFindReplace(false);
     mSplitter->addWidget(mDescription);
 
-    connect(mConfigureAgentListView, SIGNAL(descriptionChanged(QString)), mDescription, SLOT(setText(QString)));
-    connect(mConfigureAgentListView, SIGNAL(agentChanged()), this, SIGNAL(changed()));
+    connect(mConfigureAgentListView, &ConfigureAgentListView::descriptionChanged, mDescription, &QTextEdit::setText);
+    connect(mConfigureAgentListView, &ConfigureAgentListView::agentChanged, this, &ConfigureAgentsWidget::changed);
 
     setLayout(lay);
     mAgentPathList = Akonadi::XdgBaseDirs::findAllResourceDirs("data", QLatin1String("akonadi/agents"));
diff --git a/configuredialog/configuremiscpage.cpp b/configuredialog/configuremiscpage.cpp
index 5a6c20faa..ad79b19c8 100644
--- a/configuredialog/configuremiscpage.cpp
+++ b/configuredialog/configuremiscpage.cpp
@@ -81,8 +81,8 @@ MiscPageFolderTab::MiscPageFolderTab(QWidget *parent)
     connect(mMMTab.mLoopOnGotoUnread, static_cast<void (KComboBox::*)(int)>(&KComboBox::activated), this, &MiscPageFolderTab::slotEmitChanged);
     connect(mMMTab.mActionEnterFolder, static_cast<void (KComboBox::*)(int)>(&KComboBox::activated), this, &MiscPageFolderTab::slotEmitChanged);
     connect(mMMTab.mDelayedMarkTime, static_cast<void (QSpinBox::*)(int)>(&QSpinBox::valueChanged), this, &MiscPageFolderTab::slotEmitChanged);
-    connect(mMMTab.mDelayedMarkAsRead, SIGNAL(toggled(bool)), mMMTab.mDelayedMarkTime, SLOT(setEnabled(bool)));
-    connect(mMMTab.mDelayedMarkAsRead, SIGNAL(toggled(bool)), this , SLOT(slotEmitChanged()));
+    connect(mMMTab.mDelayedMarkAsRead, &QAbstractButton::toggled, mMMTab.mDelayedMarkTime, &QWidget::setEnabled);
+    connect(mMMTab.mDelayedMarkAsRead, &QAbstractButton::toggled, this , &ConfigModuleTab::slotEmitChanged);
     connect(mMMTab.mShowPopupAfterDnD, &QCheckBox::stateChanged, this, &MiscPageFolderTab::slotEmitChanged);
     connect(mOnStartupOpenFolder, &MailCommon::FolderRequester::folderChanged, this, &MiscPageFolderTab::slotEmitChanged);
     connect(mMMTab.mEmptyTrashCheck, &QCheckBox::stateChanged, this, &MiscPageFolderTab::slotEmitChanged);
diff --git a/widgets/kactionmenutransport.cpp b/widgets/kactionmenutransport.cpp
index 2e74f50b8..88f5904e5 100644
--- a/widgets/kactionmenutransport.cpp
+++ b/widgets/kactionmenutransport.cpp
@@ -25,8 +25,8 @@ KActionMenuTransport::KActionMenuTransport(QObject *parent)
 {
     setDelayed(true);
     connect(MailTransport::TransportManager::self(), SIGNAL(transportsChanged()), this, SLOT(updateTransportMenu()));
-    connect(menu(), SIGNAL(aboutToShow()), SLOT(slotCheckTransportMenu()));
-    connect(menu(), SIGNAL(triggered(QAction*)), this, SLOT(slotSelectTransport(QAction*)));
+    connect(menu(), &QMenu::aboutToShow, this, &KActionMenuTransport::slotCheckTransportMenu);
+    connect(menu(), &QMenu::triggered, this, &KActionMenuTransport::slotSelectTransport);
 }
 
 KActionMenuTransport::~KActionMenuTransport()