diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -67,6 +67,7 @@
     Notifications
     Wayland
     WidgetsAddons
+    WindowSystem
 )
 
 add_definitions(-DQT_DISABLE_DEPRECATED_BEFORE=0)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -19,6 +19,7 @@
     session.cpp
     screenshot.cpp
     screenshotdialog.cpp
+    utils.cpp
 )
 
 if (SCREENCAST_ENABLED)
@@ -50,6 +51,7 @@
     KF5::Notifications
     KF5::WaylandClient
     KF5::WidgetsAddons
+    KF5::WindowSystem
 )
 
 if (SCREENCAST_ENABLED)
diff --git a/src/access.cpp b/src/access.cpp
--- a/src/access.cpp
+++ b/src/access.cpp
@@ -19,6 +19,7 @@
 
 #include "access.h"
 #include "accessdialog.h"
+#include "utils.h"
 
 #include <QLoggingCategory>
 
@@ -54,6 +55,7 @@
     qCDebug(XdgDesktopPortalKdeAccess) << "    options: " << options;
 
     auto accessDialog = new ::AccessDialog();
+    Utils::setParentWindow(accessDialog, parent_window);
     accessDialog->setBody(body);
     accessDialog->setTitle(title);
     accessDialog->setSubtitle(subtitle);
diff --git a/src/appchooser.cpp b/src/appchooser.cpp
--- a/src/appchooser.cpp
+++ b/src/appchooser.cpp
@@ -19,6 +19,7 @@
 
 #include "appchooser.h"
 #include "appchooserdialog.h"
+#include "utils.h"
 
 #include <QLoggingCategory>
 
@@ -57,6 +58,7 @@
     }
 
     AppChooserDialog *appDialog = new AppChooserDialog(choices, latestChoice, options.value(QLatin1String("filename")).toString());
+    Utils::setParentWindow(appDialog, parent_window);
 
     if (appDialog->exec()) {
         results.insert(QLatin1String("choice"), appDialog->selectedApplication());
diff --git a/src/filechooser.cpp b/src/filechooser.cpp
--- a/src/filechooser.cpp
+++ b/src/filechooser.cpp
@@ -19,6 +19,7 @@
  */
 
 #include "filechooser.h"
+#include "utils.h"
 
 #include <QDBusMetaType>
 #include <QDBusArgument>
@@ -153,6 +154,7 @@
     }
 
     QFileDialog *fileDialog = new QFileDialog();
+    Utils::setParentWindow(fileDialog, parent_window);
     fileDialog->setWindowTitle(title);
     fileDialog->setModal(modalDialog);
     fileDialog->setFileMode(multipleFiles ? QFileDialog::ExistingFiles : QFileDialog::ExistingFile);
@@ -245,6 +247,7 @@
     }
 
     QFileDialog *fileDialog = new QFileDialog();
+    Utils::setParentWindow(fileDialog, parent_window);
     fileDialog->setWindowTitle(title);
     fileDialog->setModal(modalDialog);
     fileDialog->setAcceptMode(QFileDialog::AcceptSave);
diff --git a/src/print.cpp b/src/print.cpp
--- a/src/print.cpp
+++ b/src/print.cpp
@@ -19,6 +19,7 @@
  */
 
 #include "print.h"
+#include "utils.h"
 
 #include <KProcess>
 
@@ -599,6 +600,7 @@
     printer->setPageMargins(pageMargins, QPageLayout::Millimeter);
 
     QPrintDialog *printDialog = new QPrintDialog(printer);
+    Utils::setParentWindow(printDialog, parent_window);
 
     // Process options
 
diff --git a/src/screencast.cpp b/src/screencast.cpp
--- a/src/screencast.cpp
+++ b/src/screencast.cpp
@@ -22,6 +22,7 @@
 #include "session.h"
 #include "screencaststream.h"
 #include "screenchooserdialog.h"
+#include "utils.h"
 
 #include <QEventLoop>
 #include <QLoggingCategory>
@@ -407,6 +408,7 @@
     }
 
     QScopedPointer<ScreenChooserDialog, QScopedPointerDeleteLater> screenDialog(new ScreenChooserDialog(m_outputMap, session->multipleSources()));
+    Utils::setParentWindow(screenDialog.data(), parent_window);
 
     if (screenDialog->exec()) {
         ScreenCastPortalOutput selectedOutput = m_outputMap.value(screenDialog->selectedScreens().first());
diff --git a/src/screenshot.cpp b/src/screenshot.cpp
--- a/src/screenshot.cpp
+++ b/src/screenshot.cpp
@@ -20,6 +20,7 @@
 
 #include "screenshot.h"
 #include "screenshotdialog.h"
+#include "utils.h"
 
 #include <QColorDialog>
 #include <QDateTime>
@@ -99,6 +100,7 @@
     qCDebug(XdgDesktopPortalKdeScreenshot) << "    options: " << options;
 
     QPointer<ScreenshotDialog> screenshotDialog = new ScreenshotDialog;
+    Utils::setParentWindow(screenshotDialog, parent_window);
 
     const bool modal = options.value(QLatin1String("modal"), false).toBool();
     screenshotDialog->setModal(modal);
diff --git a/src/utils.h b/src/utils.h
new file mode 100644
--- /dev/null
+++ b/src/utils.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright © 2018 Alexander Volkov <a.volkov@rusbitech.ru>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef XDG_DESKTOP_PORTAL_KDE_UTILS_H
+#define XDG_DESKTOP_PORTAL_KDE_UTILS_H
+
+class QString;
+class QWidget;
+
+class Utils
+{
+public:
+    static void setParentWindow(QWidget *w, const QString &parent_window);
+};
+
+#endif // XDG_DESKTOP_PORTAL_KDE_UTILS_H
diff --git a/src/utils.cpp b/src/utils.cpp
new file mode 100644
--- /dev/null
+++ b/src/utils.cpp
@@ -0,0 +1,31 @@
+/*
+ * Copyright © 2018 Alexander Volkov <a.volkov@rusbitech.ru>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "utils.h"
+
+#include <KWindowSystem>
+
+#include <QString>
+#include <QWidget>
+#include <QWindow>
+
+void Utils::setParentWindow(QWidget *w, const QString &parent_window)
+{
+    if (parent_window.startsWith(QLatin1String("x11:"))) {
+        KWindowSystem::setMainWindow(w, parent_window.midRef(4).toULongLong(nullptr, 16));
+    }
+}