diff --git a/canframemodel.cpp b/canframemodel.cpp
index 5d30d21..e061a57 100644
--- a/canframemodel.cpp
+++ b/canframemodel.cpp
@@ -415,7 +415,7 @@ QVariant CANFrameModel::data(const QModelIndex &index, int role) const
     const unsigned char *data = reinterpret_cast<const unsigned char *>(thisFrame.payload().constData());
     int dataLen = thisFrame.payload().count();
 
-    if (role == Qt::BackgroundColorRole)
+    if (role == Qt::BackgroundRole)
     {
         if (dbcHandler != nullptr && interpretFrames && !ignoreDBCColors)
         {
@@ -448,7 +448,7 @@ QVariant CANFrameModel::data(const QModelIndex &index, int role) const
         }
     }
 
-    if (role == Qt::TextColorRole)
+    if (role == Qt::ForegroundRole)
     {
         if (dbcHandler != nullptr && interpretFrames && !ignoreDBCColors)
         {
diff --git a/connections/canconnection.cpp b/connections/canconnection.cpp
index 8f0e231..ba145ee 100644
--- a/connections/canconnection.cpp
+++ b/connections/canconnection.cpp
@@ -245,11 +245,11 @@ CANCon::type CANConnection::getType() {
 
 
 CANCon::status CANConnection::getStatus() {
-    return (CANCon::status) mStatus.load();
+    return (CANCon::status) mStatus.loadRelaxed();
 }
 
 void CANConnection::setStatus(CANCon::status pStatus) {
-    mStatus.store(pStatus);
+    mStatus.storeRelaxed(pStatus);
 }
 
 bool CANConnection::isCapSuspended() {
diff --git a/connections/connectionwindow.cpp b/connections/connectionwindow.cpp
index a446078..e277e58 100644
--- a/connections/connectionwindow.cpp
+++ b/connections/connectionwindow.cpp
@@ -501,8 +501,10 @@ CANConnection* ConnectionWindow::create(CANCon::type pTye, QString pPortName, QS
 
 void ConnectionWindow::loadConnections()
 {
+#if QT_VERSION < QT_VERSION_CHECK( 6, 0, 0 )
     qRegisterMetaTypeStreamOperators<CANBus>();
     qRegisterMetaTypeStreamOperators<QList<CANBus>>();
+#endif
 
     QSettings settings;
 
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 1923063..2351670 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -30,8 +30,10 @@ MainWindow::MainWindow(QWidget *parent) :
     ui(new Ui::MainWindow)
 {
     ui->setupUi(this);
+#if QT_VERSION < QT_VERSION_CHECK( 6, 0, 0 )
     qRegisterMetaTypeStreamOperators<QVector<QString>>();
     qRegisterMetaTypeStreamOperators<QVector<int>>();
+#endif
 
     useHex = true;
 
@@ -178,7 +180,7 @@ MainWindow::MainWindow(QWidget *parent) :
     updateTimer.setInterval(250);
     updateTimer.start();
 
-    elapsedTime = new QTime;
+    elapsedTime = new QElapsedTimer;
     elapsedTime->start();
 
     isConnected = false;
diff --git a/mainwindow.h b/mainwindow.h
index 39bb612..9967215 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -138,7 +138,7 @@ private:
     DBCHandler *dbcHandler;
     QByteArray inputBuffer;
     QTimer updateTimer;
-    QTime *elapsedTime;
+    QElapsedTimer *elapsedTime;
     int framesPerSec;
     int rxFrames;
     bool inhibitFilterUpdate;
diff --git a/qcustomplot.h b/qcustomplot.h
index 8f0f78b..170850b 100644
--- a/qcustomplot.h
+++ b/qcustomplot.h
@@ -156,26 +156,8 @@ class QCPPolarGraph;
   
   It provides QMetaObject-based reflection of its enums and flags via \a QCP::staticMetaObject.
 */
-#ifndef Q_MOC_RUN
 namespace QCP {
-#else
-class QCP { // when in moc-run, make it look like a class, so we get Q_GADGET, Q_ENUMS/Q_FLAGS features in namespace
-  Q_GADGET
-  Q_ENUMS(ExportPen)
-  Q_ENUMS(ResolutionUnit)
-  Q_ENUMS(SignDomain)
-  Q_ENUMS(MarginSide)
-  Q_FLAGS(MarginSides)
-  Q_ENUMS(AntialiasedElement)
-  Q_FLAGS(AntialiasedElements)
-  Q_ENUMS(PlottingHint)
-  Q_FLAGS(PlottingHints)
-  Q_ENUMS(Interaction)
-  Q_FLAGS(Interactions)
-  Q_ENUMS(SelectionRectMode)
-  Q_ENUMS(SelectionType)
-public:
-#endif
+    Q_NAMESPACE
 
 /*!
   Defines the different units in which the image resolution can be specified in the export
@@ -318,6 +300,20 @@ enum SelectionType { stNone                ///< The plottable is not selectable
                      ,stMultipleDataRanges ///< Any combination of data points/ranges can be selected
                     };
 
+  Q_ENUM_NS(ExportPen)
+  Q_ENUM_NS(ResolutionUnit)
+  Q_ENUM_NS(SignDomain)
+  Q_ENUM_NS(MarginSide)
+  Q_FLAG_NS(MarginSides)
+  Q_ENUM_NS(AntialiasedElement)
+  Q_FLAG_NS(AntialiasedElements)
+  Q_ENUM_NS(PlottingHint)
+  Q_FLAG_NS(PlottingHints)
+  Q_ENUM_NS(Interaction)
+  Q_FLAG_NS(Interactions)
+  Q_ENUM_NS(SelectionRectMode)
+  Q_ENUM_NS(SelectionType)
+
 /*! \internal
   
   Returns whether the specified \a value is considered an invalid data value for plottables (i.e.
@@ -386,15 +382,7 @@ Q_DECLARE_OPERATORS_FOR_FLAGS(QCP::AntialiasedElements)
 Q_DECLARE_OPERATORS_FOR_FLAGS(QCP::PlottingHints)
 Q_DECLARE_OPERATORS_FOR_FLAGS(QCP::MarginSides)
 Q_DECLARE_OPERATORS_FOR_FLAGS(QCP::Interactions)
-Q_DECLARE_METATYPE(QCP::ExportPen)
-Q_DECLARE_METATYPE(QCP::ResolutionUnit)
-Q_DECLARE_METATYPE(QCP::SignDomain)
-Q_DECLARE_METATYPE(QCP::MarginSide)
-Q_DECLARE_METATYPE(QCP::AntialiasedElement)
-Q_DECLARE_METATYPE(QCP::PlottingHint)
-Q_DECLARE_METATYPE(QCP::Interaction)
-Q_DECLARE_METATYPE(QCP::SelectionRectMode)
-Q_DECLARE_METATYPE(QCP::SelectionType)
+//no need to use Q_DECLARE_METATYPE on enum since Q_ENUM_NS adds enum as metatype automatically
 
 /* end of 'src/global.h' */
 
diff --git a/re/sniffer/snifferitem.h b/re/sniffer/snifferitem.h
index 0995a10..ea0a086 100644
--- a/re/sniffer/snifferitem.h
+++ b/re/sniffer/snifferitem.h
@@ -2,7 +2,7 @@
 #define SNIFFERITEM_H
 
 #include <QVariant>
-#include <QTime>
+#include <QElapsedTimer>
 #include "can_structs.h"
 
 struct fstCan
@@ -50,7 +50,7 @@ private:
     quint64         mCurrentTime;
     quint64         mCurrSeqVal;
 
-    QTime           mTime;
+    QElapsedTimer   mTime;
 };
 
 #endif // SNIFFERITEM_H
diff --git a/scriptingwindow.cpp b/scriptingwindow.cpp
index 1d5f378..1f24dee 100644
--- a/scriptingwindow.cpp
+++ b/scriptingwindow.cpp
@@ -4,6 +4,9 @@
 #include <QFile>
 #include <QFileDialog>
 #include <QSettings>
+#if QT_VERSION >= QT_VERSION_CHECK( 5, 10, 0 )
+#include <QtCore/QRandomGenerator>
+#endif
 
 #include "connections/canconmanager.h"
 #include "helpwindow.h"
@@ -234,7 +237,13 @@ void ScriptingWindow::createNewScript()
 
     container = new ScriptContainer();
 
-    container->fileName = "UNNAMED_" + QString::number((qrand() % 10000)) + ".js";
+    QString randomPart;
+#if QT_VERSION < QT_VERSION_CHECK( 5, 10, 0 )
+    randomPart = QString::number((qrand() % 10000));
+#else
+    randomPart = QString::number((QRandomGenerator::global()->bounded(10000)));
+#endif
+    container->fileName = "UNNAMED_" + randomPart + ".js";
     container->filePath = QString();
     container->scriptText = QString();
     container->setScriptWindow(this);
diff --git a/simplecrypt.cpp b/simplecrypt.cpp
index 79a16ba..51f4271 100644
--- a/simplecrypt.cpp
+++ b/simplecrypt.cpp
@@ -31,6 +31,10 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <QDateTime>
 #include <QCryptographicHash>
 #include <QDataStream>
+#include <QIODevice>
+#if QT_VERSION >= QT_VERSION_CHECK( 5, 10, 0 )
+#include <QtCore/QRandomGenerator>
+#endif
 
 SimpleCrypt::SimpleCrypt():
     m_key(0),
@@ -38,7 +42,9 @@ SimpleCrypt::SimpleCrypt():
     m_protectionMode(ProtectionChecksum),
     m_lastError(ErrorNoError)
 {
+#if QT_VERSION < QT_VERSION_CHECK( 5, 10, 0 )
     qsrand(uint(QDateTime::currentMSecsSinceEpoch() & 0xFFFF));
+#endif
 }
 
 SimpleCrypt::SimpleCrypt(quint64 key):
@@ -47,7 +53,9 @@ SimpleCrypt::SimpleCrypt(quint64 key):
     m_protectionMode(ProtectionChecksum),
     m_lastError(ErrorNoError)
 {
+#if QT_VERSION < QT_VERSION_CHECK( 5, 10, 0 )
     qsrand(uint(QDateTime::currentMSecsSinceEpoch() & 0xFFFF));
+#endif
     splitKey();
 }
 
@@ -113,7 +121,11 @@ QByteArray SimpleCrypt::encryptToByteArray(QByteArray plaintext)
     }
 
     //prepend a random char to the string
+#if QT_VERSION < QT_VERSION_CHECK( 5, 10, 0 )
     char randomChar = char(qrand() & 0xFF);
+#else
+    char randomChar = char(QRandomGenerator::global()->bounded(256));
+#endif
     ba = randomChar + integrityProtection + ba;
 
     int pos(0);