diff --git a/SingleApplication/singleapplication.cpp b/SingleApplication/singleapplication.cpp
index e308e2073..57672ee77 100644
--- a/SingleApplication/singleapplication.cpp
+++ b/SingleApplication/singleapplication.cpp
@@ -25,6 +25,7 @@
 #include <QtCore/QDateTime>
 #include <QtCore/QByteArray>
 #include <QtCore/QSharedMemory>
+#include <QRandomGenerator>
 
 #include "singleapplication.h"
 #include "singleapplication_p.h"
@@ -99,8 +100,13 @@ SingleApplication::SingleApplication( int &argc, char *argv[], bool allowSeconda
         d->memory->unlock();
 
         // Random sleep here limits the probability of a collision between two racing apps
+#if QT_VERSION < QT_VERSION_CHECK(5, 10, 0)	// ### Qt 6: remove
         qsrand( QDateTime::currentMSecsSinceEpoch() % std::numeric_limits<uint>::max() );
         QThread::sleep( 8 + static_cast <unsigned long>( static_cast <float>( qrand() ) / RAND_MAX * 10 ) );
+#else
+	quint32 value = QRandomGenerator::global()->generate();
+        QThread::sleep( 8 + static_cast <unsigned long>( static_cast <float>( value ) / RAND_MAX * 10 ) );
+#endif
     }
 
     if( inst->primary == false) {