diff --git a/src/tycommander/arduino_dialog.cc b/src/tycommander/arduino_dialog.cc
index 0e29235..e6fb40b 100644
--- a/src/tycommander/arduino_dialog.cc
+++ b/src/tycommander/arduino_dialog.cc
@@ -13,7 +13,7 @@
 #endif
 #include <QCoreApplication>
 #include <QFileDialog>
-#include <QSysInfo>
+#include <QOperatingSystemVersion>
 #include <QWinEventNotifier>
 
 #include "arduino_dialog.hpp"
@@ -152,7 +152,9 @@ void ArduinoDialog::appendMessage(const QString &msg, const QTextCharFormat &fmt
 void ArduinoDialog::executeAsRoot(const QString &command)
 {
 #ifdef _WIN32
-    if (QSysInfo::windowsVersion() >= QSysInfo::WV_VISTA) {
+    auto vista = QOperatingSystemVersion(QOperatingSystemVersion::Windows, 6, 0);
+
+    if (QOperatingSystemVersion::current() >= vista) {
         installWithUAC(command);
         return;
     }
diff --git a/src/tycommander/enhanced_widgets.cc b/src/tycommander/enhanced_widgets.cc
index 9cdb45b..4cf73a7 100644
--- a/src/tycommander/enhanced_widgets.cc
+++ b/src/tycommander/enhanced_widgets.cc
@@ -139,9 +139,9 @@ void EnhancedLineInput::keyPressEvent(QKeyEvent *ev)
 
 void EnhancedLineInput::wheelEvent(QWheelEvent *ev)
 {
-    if (ev->delta() > 0) {
+    if (ev->angleDelta().y() > 0) {
         moveInHistory(-1);
-    } else if (ev->delta() < 0) {
+    } else if (ev->angleDelta().y() < 0) {
         moveInHistory(1);
     }
 }
diff --git a/src/tycommander/session_channel.cc b/src/tycommander/session_channel.cc
index 80403d2..bc46f42 100644
--- a/src/tycommander/session_channel.cc
+++ b/src/tycommander/session_channel.cc
@@ -202,8 +202,11 @@ SessionPeer::SessionPeer(QLocalSocket *socket)
     QObject::connect(socket, &QLocalSocket::disconnected, this, [=]() {
         close(RemoteClose);
     });
-    QObject::connect(socket, static_cast<void(QLocalSocket::*)(QLocalSocket::LocalSocketError)>(&QLocalSocket::error),
-                     this, [=]() {
+#if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)
+    QObject::connect(socket, &QLocalSocket::errorOccurred, this, [=]() {
+#else
+    QObject::connect(socket, static_cast<void(QLocalSocket::*)(QLocalSocket::LocalSocketError)>(&QLocalSocket::error), this, [=]() {
+#endif
         close(Error);
     });
 }