diff --git a/widgets/mainwindow.cpp b/widgets/mainwindow.cpp
index bb0c1bc8d..aa6daebbe 100644
--- a/widgets/mainwindow.cpp
+++ b/widgets/mainwindow.cpp
@@ -1028,9 +1028,9 @@ void MainWindow::not_GA_warning_message ()
   MessageBox::critical_message (this,
                                 "This is a pre-release version of WSJT-X 2.5.0 made\n"
                                 "available for testing purposes.  By design it will\n"
-                                "be nonfunctional after Aug 31, 2021.");
+                                "be nonfunctional after Sept 30, 2021.");
   auto now = QDateTime::currentDateTimeUtc ();
-  if (now >= QDateTime {{2021, 8, 31}, {23, 59, 59, 999}, Qt::UTC}) {
+  if (now >= QDateTime {{2021, 9, 30}, {23, 59, 59, 999}, Qt::UTC}) {
     Q_EMIT finished ();
   }
 }