diff --git a/pglab/ConnectionConfigurationWidget.cpp b/pglab/ConnectionConfigurationWidget.cpp
index 0e656d1..d8cb329 100644
--- a/pglab/ConnectionConfigurationWidget.cpp
+++ b/pglab/ConnectionConfigurationWidget.cpp
@@ -33,17 +33,16 @@ void ConnectionConfigurationWidget::editExistingInWindow(ConnectionController *c
 	auto win = new QDialog;
 	win->setWindowTitle(tr("Edit connection configuration"));
 	win->setLayout(vbox);
+	win->setAttribute( Qt::WA_DeleteOnClose, true );
 
 	win->connect(btn_hbox, &QDialogButtonBox::accepted, [ctrl, w, win] () {
 		auto [grp, cc] = w->data();
 		ctrl->getConnectionTreeModel()->save(grp, cc);
 		win->accept();
 	});
-	win->connect(btn_hbox, &QDialogButtonBox::rejected, [win] () { win->reject(); });
-
-	win->connect(win, &QDialog::finished, [win] (int)
+	win->connect(btn_hbox, &QDialogButtonBox::rejected, [win] ()
 	{
-		delete win;
+			win->reject();
 	});
 
 	win->show();