diff --git a/plugins/clipboard/clipboard_config.cpp b/plugins/clipboard/clipboard_config.cpp
index d3c955fe2..72f50d394 100644
--- a/plugins/clipboard/clipboard_config.cpp
+++ b/plugins/clipboard/clipboard_config.cpp
@@ -17,8 +17,8 @@ ClipboardConfig::ClipboardConfig(QObject *parent, const QVariantList &args)
 {
     m_ui->setupUi(widget());
 
-    connect(m_ui->check_autoshare, SIGNAL(toggled(bool)), this, SLOT(autoShareChanged()));
-    connect(m_ui->check_password, SIGNAL(toggled(bool)), this, SLOT(changed()));
+    connect(m_ui->check_autoshare, &QCheckBox::toggled, this, &ClipboardConfig::autoShareChanged);
+    connect(m_ui->check_password, &QCheckBox::toggled, this, &ClipboardConfig::markAsChanged);
 }
 
 ClipboardConfig::~ClipboardConfig()
diff --git a/plugins/clipboard/clipboard_config.h b/plugins/clipboard/clipboard_config.h
index 1252c10e4..e30a98b29 100644
--- a/plugins/clipboard/clipboard_config.h
+++ b/plugins/clipboard/clipboard_config.h
@@ -24,10 +24,9 @@ public:
     void save() override;
     void load() override;
     void defaults() override;
-public Q_SLOTS:
-    void autoShareChanged();
 
 private:
+    void autoShareChanged();
     Ui::ClipboardConfigUi *m_ui;
 };
 
diff --git a/plugins/pausemusic/pausemusic_config.cpp b/plugins/pausemusic/pausemusic_config.cpp
index 4cab94c4f..397ac89f6 100644
--- a/plugins/pausemusic/pausemusic_config.cpp
+++ b/plugins/pausemusic/pausemusic_config.cpp
@@ -17,11 +17,11 @@ PauseMusicConfig::PauseMusicConfig(QObject *parent, const QVariantList &args)
 {
     m_ui->setupUi(widget());
 
-    connect(m_ui->rad_ringing, SIGNAL(toggled(bool)), this, SLOT(changed()));
-    connect(m_ui->rad_talking, SIGNAL(toggled(bool)), this, SLOT(changed()));
-    connect(m_ui->check_pause, SIGNAL(toggled(bool)), this, SLOT(changed()));
-    connect(m_ui->check_mute, SIGNAL(toggled(bool)), this, SLOT(changed()));
-    connect(m_ui->check_resume, SIGNAL(toggled(bool)), this, SLOT(changed()));
+    connect(m_ui->rad_ringing, &QCheckBox::toggled, this, &PauseMusicConfig::markAsChanged);
+    connect(m_ui->rad_talking, &QCheckBox::toggled, this, &PauseMusicConfig::markAsChanged);
+    connect(m_ui->check_pause, &QCheckBox::toggled, this, &PauseMusicConfig::markAsChanged);
+    connect(m_ui->check_mute, &QCheckBox::toggled, this, &PauseMusicConfig::markAsChanged);
+    connect(m_ui->check_resume, &QCheckBox::toggled, this, &PauseMusicConfig::markAsChanged);
 }
 
 PauseMusicConfig::~PauseMusicConfig()
diff --git a/plugins/runcommand/runcommand_config.h b/plugins/runcommand/runcommand_config.h
index 17fa745e9..8d1429614 100644
--- a/plugins/runcommand/runcommand_config.h
+++ b/plugins/runcommand/runcommand_config.h
@@ -22,12 +22,11 @@ public:
     void load() override;
     void defaults() override;
 
-private Q_SLOTS:
+private:
     void onDataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight);
     void exportCommands();
     void importCommands();
 
-private:
     void addSuggestedCommand(QMenu *menu, const QString &name, const QString &command);
     void insertRow(int i, const QString &name, const QString &command);
     void insertEmptyRow();
diff --git a/plugins/sendnotifications/sendnotifications_config.cpp b/plugins/sendnotifications/sendnotifications_config.cpp
index 74312bfdb..2ab9ba7be 100644
--- a/plugins/sendnotifications/sendnotifications_config.cpp
+++ b/plugins/sendnotifications/sendnotifications_config.cpp
@@ -33,14 +33,14 @@ SendNotificationsConfig::SendNotificationsConfig(QObject *parent, const QVariant
     for (int i = 0; i < 3; i++)
         m_ui->appList->resizeColumnToContents(i);
 
-    connect(m_ui->appList->horizontalHeader(), SIGNAL(sortIndicatorChanged(int, Qt::SortOrder)), m_ui->appList, SLOT(sortByColumn(int)));
+    connect(m_ui->appList->horizontalHeader(), &QHeaderView::sortIndicatorChanged, m_ui->appList, &QTableView::sortByColumn);
 
-    connect(m_ui->check_persistent, SIGNAL(toggled(bool)), this, SLOT(changed()));
-    connect(m_ui->spin_urgency, SIGNAL(editingFinished()), this, SLOT(changed()));
-    connect(m_ui->check_body, SIGNAL(toggled(bool)), this, SLOT(changed()));
-    connect(m_ui->check_icons, SIGNAL(toggled(bool)), this, SLOT(changed()));
+    connect(m_ui->check_persistent, &QCheckBox::toggled, this, &SendNotificationsConfig::markAsChanged);
+    connect(m_ui->spin_urgency, &QSpinBox::editingFinished, this, &SendNotificationsConfig::markAsChanged);
+    connect(m_ui->check_body, &QCheckBox::toggled, this, &SendNotificationsConfig::markAsChanged);
+    connect(m_ui->check_icons, &QCheckBox::toggled, this, &SendNotificationsConfig::markAsChanged);
 
-    connect(appModel, SIGNAL(applicationsChanged()), this, SLOT(changed()));
+    connect(appModel, &NotifyingApplicationModel::applicationsChanged, this, &SendNotificationsConfig::markAsChanged);
 
     connect(config(), &KdeConnectPluginConfig::configChanged, this, &SendNotificationsConfig::loadApplications);
 }
diff --git a/plugins/share/shareplugin.cpp b/plugins/share/shareplugin.cpp
index 7de6e1706..8d4a711a4 100644
--- a/plugins/share/shareplugin.cpp
+++ b/plugins/share/shareplugin.cpp
@@ -174,7 +174,7 @@ bool SharePlugin::receivePacket(const NetworkPacket &np)
 
             if (defaultApp == QLatin1String("org.kde.kate") || defaultApp == QLatin1String("org.kde.kwrite")) {
                 QProcess *proc = new QProcess();
-                connect(proc, SIGNAL(finished(int)), proc, SLOT(deleteLater()));
+                connect(proc, &QProcess::finished, proc, &QObject::deleteLater);
                 proc->start(defaultApp.section(QStringLiteral("."), 2, 2), QStringList(QStringLiteral("--stdin")));
                 proc->write(text.toUtf8());
                 proc->closeWriteChannel();