diff --git a/MessageClient.cpp b/MessageClient.cpp
index 3ff6d04..71b5498 100644
--- a/MessageClient.cpp
+++ b/MessageClient.cpp
@@ -232,7 +232,7 @@ void MessageClient::impl::heartbeat ()
       Message m("PING", "", QMap<QString, QVariant>{
         {"NAME", QVariant(QApplication::applicationName())},
         {"VERSION", QVariant(QApplication::applicationVersion())},
-        {"UTC", QVariant(QDateTime::currentDateTimeUtc().toSecsSinceEpoch())}
+        {"UTC", QVariant(QDateTime::currentDateTimeUtc().toMSecsSinceEpoch())}
       });
       writeDatagram (m.toJson(), server_, server_port_);
     }
diff --git a/mainwindow.cpp b/mainwindow.cpp
index b391358..803ce1b 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -9120,7 +9120,7 @@ void MainWindow::networkMessage(Message const &message)
             QMap<QString, QVariant> detail;
             detail["SNR"] = QVariant(cd.snr);
             detail["GRID"] = QVariant(cd.grid);
-            detail["UTC"] = QVariant(cd.utcTimestamp.toSecsSinceEpoch());
+            detail["UTC"] = QVariant(cd.utcTimestamp.toMSecsSinceEpoch());
             calls[cd.call] = QVariant(detail);
         }
 
@@ -9142,7 +9142,7 @@ void MainWindow::networkMessage(Message const &message)
             detail["FREQ"] = QVariant(d.freq);
             detail["TEXT"] = QVariant(d.text);
             detail["SNR"] = QVariant(d.snr);
-            detail["UTC"] = QVariant(d.utcTimestamp.toSecsSinceEpoch());
+            detail["UTC"] = QVariant(d.utcTimestamp.toMSecsSinceEpoch());
             offsets[QString("%1").arg(offset)] = QVariant(detail);
         }