diff --git a/qubesmanager/backup.py b/qubesmanager/backup.py
index c6f8d926..d35c24be 100644
--- a/qubesmanager/backup.py
+++ b/qubesmanager/backup.py
@@ -24,7 +24,7 @@
 from qubesadmin import exc
 from qubesadmin import utils as admin_utils
 
-from PyQt5 import QtCore, QtWidgets, QtGui  # pylint: disable=import-error
+from PyQt5 import QtCore, QtWidgets, QtGui, Qt  # pylint: disable=import-error
 from . import ui_backupdlg  # pylint: disable=no-name-in-module
 from . import multiselectwidget
 
@@ -80,6 +80,10 @@ def __init__(self, qt_app, qubes_app, dispatcher, parent=None):
 
         self.setupUi(self)
 
+        self.setWindowFlags(self.windowFlags() |
+                            Qt.Qt.WindowMaximizeButtonHint |
+                            Qt.Qt.WindowMinimizeButtonHint)
+
         self.progress_status.text = self.tr("Backup in progress...")
         self.dir_line_edit.setReadOnly(False)
 
diff --git a/qubesmanager/bootfromdevice.py b/qubesmanager/bootfromdevice.py
index 25c3bbcd..f0502f2b 100644
--- a/qubesmanager/bootfromdevice.py
+++ b/qubesmanager/bootfromdevice.py
@@ -21,7 +21,7 @@
 import subprocess
 from . import utils
 from . import ui_bootfromdevice  # pylint: disable=no-name-in-module
-from PyQt5 import QtWidgets, QtGui  # pylint: disable=import-error
+from PyQt5 import QtWidgets, QtGui, Qt  # pylint: disable=import-error
 from qubesadmin import tools
 from qubesadmin import exc
 from qubesadmin.tools import qvm_start
@@ -41,6 +41,9 @@ def __init__(self, vm, qapp, qubesapp=None, parent=None, new_vm=False):
         self.setupUi(self)
         self.setWindowTitle(
             self.tr("Boot {vm} from device").format(vm=self.vm))
+        self.setWindowFlags(self.windowFlags() |
+                            Qt.Qt.WindowMaximizeButtonHint |
+                            Qt.Qt.WindowMinimizeButtonHint)
 
         self.buttonBox.accepted.connect(self.save_and_apply)
         self.buttonBox.rejected.connect(self.reject)
diff --git a/qubesmanager/global_settings.py b/qubesmanager/global_settings.py
index def390ea..2b312a0b 100644
--- a/qubesmanager/global_settings.py
+++ b/qubesmanager/global_settings.py
@@ -24,7 +24,7 @@
 import sys
 import subprocess
 import pkg_resources
-from PyQt5 import QtWidgets, QtCore, QtGui  # pylint: disable=import-error
+from PyQt5 import QtWidgets, QtCore, QtGui, Qt  # pylint: disable=import-error
 
 from qubesadmin.utils import parse_size
 from qubesadmin import exc
@@ -82,6 +82,10 @@ def __init__(self, app, qubes_app, parent=None):
         self.buttonBox.accepted.connect(self.save_and_apply)
         self.buttonBox.rejected.connect(self.reject)
 
+        self.setWindowFlags(self.windowFlags() |
+                            Qt.Qt.WindowMaximizeButtonHint |
+                            Qt.Qt.WindowMinimizeButtonHint)
+
         self.__init_ux()
 
         self.__init_system_defaults__()
diff --git a/qubesmanager/log_dialog.py b/qubesmanager/log_dialog.py
index ef2d812a..17dec878 100644
--- a/qubesmanager/log_dialog.py
+++ b/qubesmanager/log_dialog.py
@@ -22,7 +22,7 @@
 import sys
 import os
 from functools import partial
-from PyQt5 import QtWidgets  # pylint: disable=import-error
+from PyQt5 import QtWidgets, Qt  # pylint: disable=import-error
 from qubesadmin import Qubes
 from . import ui_logdlg   # pylint: disable=no-name-in-module
 from . import clipboard
@@ -42,6 +42,9 @@ def __init__(self, app, logfiles, parent=None):
         self.displayed_text = ""
 
         self.setupUi(self)
+        self.setWindowFlags(self.windowFlags() |
+                            Qt.Qt.WindowMaximizeButtonHint |
+                            Qt.Qt.WindowMinimizeButtonHint)
 
         self.copy_to_qubes_clipboard.clicked.connect(
             self.copy_to_clipboard_triggered)
diff --git a/qubesmanager/restore.py b/qubesmanager/restore.py
index 24eab67c..a3379897 100644
--- a/qubesmanager/restore.py
+++ b/qubesmanager/restore.py
@@ -20,7 +20,7 @@
 #
 #
 
-from PyQt5 import QtCore, QtWidgets, QtGui  # pylint: disable=import-error
+from PyQt5 import QtCore, QtWidgets, QtGui, Qt  # pylint: disable=import-error
 import os
 import os.path
 import logging
@@ -74,6 +74,9 @@ def __init__(self, qt_app, qubes_app, parent=None):
 
         self.qt_app = qt_app
         self.qubes_app = qubes_app
+        self.setWindowFlags(self.windowFlags() |
+                            Qt.Qt.WindowMaximizeButtonHint |
+                            Qt.Qt.WindowMinimizeButtonHint)
 
         self.vms_to_restore = None
         self.func_output = []
diff --git a/qubesmanager/settings.py b/qubesmanager/settings.py
index 39bd7269..1de47ab8 100644
--- a/qubesmanager/settings.py
+++ b/qubesmanager/settings.py
@@ -43,7 +43,7 @@
 
 from .appmenu_select import AppmenuSelectManager
 from . import firewall
-from PyQt5 import QtCore, QtWidgets, QtGui  # pylint: disable=import-error
+from PyQt5 import QtCore, QtWidgets, QtGui, Qt  # pylint: disable=import-error
 
 from . import ui_settingsdlg  # pylint: disable=no-name-in-module
 
@@ -151,6 +151,9 @@ def __init__(self, vm, init_page="basic", qapp=None, qubesapp=None,
 
         self.setupUi(self)
         self.setWindowTitle(self.tr("Settings: {vm}").format(vm=self.vm.name))
+        self.setWindowFlags(self.windowFlags() |
+                            Qt.Qt.WindowMaximizeButtonHint |
+                            Qt.Qt.WindowMinimizeButtonHint)
         if init_page in self.tabs_indices:
             idx = self.tabs_indices[init_page]
             assert idx in range(self.tabWidget.count())