--- a/NodeGraphQt/widgets/viewer.py
+++ b/NodeGraphQt/widgets/viewer.py
@@ -521,8 +521,10 @@ class NodeViewer(QtWidgets.QGraphicsView):
                 path = QtGui.QPainterPath()
                 path.addRect(map_rect)
                 self._rubber_band.setGeometry(rect)
+                # PySide6 6.7+ requires ItemSelectionOperation parameter
                 self.scene().setSelectionArea(
-                    path, QtCore.Qt.IntersectsItemShape
+                    path, QtCore.Qt.ReplaceSelection,
+                    QtCore.Qt.IntersectsItemShape
                 )
                 self.scene().update(map_rect)