--- a/eric6/E5Network/E5NetworkHeaderDetailsDialog.py	Mon Mar 01 17:48:43 2021 +0100
+++ b/eric6/E5Network/E5NetworkHeaderDetailsDialog.py	Tue Mar 02 17:17:09 2021 +0100
@@ -25,7 +25,7 @@
         """
         super(E5NetworkHeaderDetailsDialog, self).__init__(parent)
         self.setupUi(self)
-        self.setWindowFlags(Qt.Window)
+        self.setWindowFlags(Qt.WindowType.Window)
     
     def setData(self, name, value):
         """