diff --git a/YACReaderLibrary/library_window.cpp b/YACReaderLibrary/library_window.cpp
index 0d3e4f72..d7335ba4 100644
--- a/YACReaderLibrary/library_window.cpp
+++ b/YACReaderLibrary/library_window.cpp
@@ -2176,8 +2176,8 @@ void LibraryWindow::toNormal()
     auto timer = new QTimer();
     timer->setSingleShot(true);
     timer->start();
-    connect(timer, SIGNAL(timeout()), libraryToolBar, SLOT(show()));
-    connect(timer, SIGNAL(timeout()), timer, SLOT(deleteLater()));
+    connect(timer, &QTimer::timeout, libraryToolBar, &YACReaderMacOSXToolbar::show);
+    connect(timer, &QTimer::timeout, timer, &QTimer::deleteLater);
 #else
     libraryToolBar->show();
 #endif
diff --git a/custom_widgets/yacreader_macosx_toolbar.mm b/custom_widgets/yacreader_macosx_toolbar.mm
index 51ea4d76..2b206718 100644
--- a/custom_widgets/yacreader_macosx_toolbar.mm
+++ b/custom_widgets/yacreader_macosx_toolbar.mm
@@ -188,7 +188,7 @@ void YACReaderMacOSXToolbar::addAction(QAction *action)
     QMacToolBarItem *toolBarItem = addItem(action->icon(), action->text());
     if (action->data().toString() == TOGGLE_COMICS_VIEW_ACTION_YL)
         viewSelector = toolBarItem;
-    connect(toolBarItem, SIGNAL(activated()), action, SIGNAL(triggered()));
+    connect(toolBarItem, &QMacToolBarItem::activated, action, [=] { emit action->triggered(); });
 
     NSToolbarItem *nativeItem = toolBarItem->nativeToolBarItem();
     actions.insert(QString::fromNSString(nativeItem.itemIdentifier), action);
@@ -287,7 +287,7 @@ QAction *YACReaderMacOSXToolbar::addFitToWidthSlider(QAction *attachToAction)
 
     QAction *action = new QAction("", attachToAction->parent());
 
-    connect(toolBarItem, SIGNAL(activated()), action, SIGNAL(triggered()));
+    connect(toolBarItem, &QMacToolBarItem::activated, action, [=] { emit action->triggered(); });
 
     return action;
 }
@@ -359,8 +359,8 @@ MacToolBarItemWrapper::MacToolBarItemWrapper(QAction *action, QMacToolBarItem *t
     : action(action), toolbaritem(toolbaritem)
 {
     if (action->isCheckable()) {
-        connect(action, SIGNAL(toggled(bool)), this, SLOT(actionToggled(bool)));
-        connect(toolbaritem, SIGNAL(activated()), action, SLOT(toggle()));
+        connect(action, &QAction::toggled, this, &MacToolBarItemWrapper::actionToggled);
+        connect(toolbaritem, &QMacToolBarItem::activated, action, &QAction::toggle);
         updateIcon(action->isChecked());
     }
 }
diff --git a/custom_widgets/yacreader_titled_toolbar.cpp b/custom_widgets/yacreader_titled_toolbar.cpp
index cd39462f..bacde44e 100644
--- a/custom_widgets/yacreader_titled_toolbar.cpp
+++ b/custom_widgets/yacreader_titled_toolbar.cpp
@@ -100,7 +100,7 @@ void YACReaderTitledToolBar::addAction(QAction *action)
     pb->setIcon(action->icon());
     pb->addAction(action);
 
-    connect(pb, SIGNAL(clicked(bool)), action, SIGNAL(triggered(bool)));
+    connect(pb, &QPushButton::clicked, action, &QAction::triggered);
 
     mainLayout->addWidget(pb);
 #else