diff --git a/pyslvs_ui/__main__.py b/pyslvs_ui/__main__.py
index d73db7895..55bd161eb 100644
--- a/pyslvs_ui/__main__.py
+++ b/pyslvs_ui/__main__.py
@@ -22,9 +22,9 @@ def main() -> None:
     from platform import system
     from pyslvs_ui.info import ARGUMENTS, logger
     if ARGUMENTS.cmd in {'gui', None}:
-        from qtpy.QtCore import Qt, qInstallMessageHandler
-        from qtpy.QtWidgets import QApplication, QSplashScreen
-        from qtpy.QtGui import QPixmap
+        from pyslvs_ui.qt.QtCore import Qt, qInstallMessageHandler
+        from pyslvs_ui.qt.QtWidgets import QApplication, QSplashScreen
+        from pyslvs_ui.qt.QtGui import QPixmap
         _app = QApplication(argv)
         # Depress Qt warning
         qInstallMessageHandler(lambda _0, _1, _2: None)
diff --git a/pyslvs_ui/entities/edit_link.py b/pyslvs_ui/entities/edit_link.py
index 908bda615..270b787e4 100644
--- a/pyslvs_ui/entities/edit_link.py
+++ b/pyslvs_ui/entities/edit_link.py
@@ -9,11 +9,11 @@
 
 from re import match
 from typing import List, Union
-from qtpy.QtCore import Slot, Qt
-from qtpy.QtWidgets import (
+from pyslvs_ui.qt.QtCore import Slot, Qt
+from pyslvs_ui.qt.QtWidgets import (
     QDialog, QListWidgetItem, QDialogButtonBox, QColorDialog, QWidget,
 )
-from qtpy.QtGui import QIcon, QPixmap
+from pyslvs_ui.qt.QtGui import QIcon, QPixmap
 from pyslvs import VPoint, VLink, color_names
 from pyslvs_ui.graphics import color_qt, color_icon
 from .utility import set_custom_color, add_custom_color
diff --git a/pyslvs_ui/entities/edit_link_ui.py b/pyslvs_ui/entities/edit_link_ui.py
index eacc610b9..62d289cdd 100644
--- a/pyslvs_ui/entities/edit_link_ui.py
+++ b/pyslvs_ui/entities/edit_link_ui.py
@@ -8,7 +8,7 @@
 # run again.  Do not edit this file unless you know what you are doing.
 
 
-from qtpy import QtCore, QtGui, QtWidgets
+from pyslvs_ui.qt import QtCore, QtGui, QtWidgets
 
 
 class Ui_Dialog(object):
diff --git a/pyslvs_ui/entities/edit_point.py b/pyslvs_ui/entities/edit_point.py
index c78790bd8..87c387448 100644
--- a/pyslvs_ui/entities/edit_point.py
+++ b/pyslvs_ui/entities/edit_point.py
@@ -8,9 +8,9 @@
 __email__ = "pyslvs@gmail.com"
 
 from typing import List, Union
-from qtpy.QtCore import Slot, Qt
-from qtpy.QtWidgets import QDialog, QListWidgetItem, QColorDialog, QWidget
-from qtpy.QtGui import QIcon, QPixmap
+from pyslvs_ui.qt.QtCore import Slot, Qt
+from pyslvs_ui.qt.QtWidgets import QDialog, QListWidgetItem, QColorDialog, QWidget
+from pyslvs_ui.qt.QtGui import QIcon, QPixmap
 from pyslvs import VPoint, VLink, color_names
 from pyslvs_ui.graphics import color_qt, color_icon
 from .utility import set_custom_color, add_custom_color
diff --git a/pyslvs_ui/entities/edit_point_ui.py b/pyslvs_ui/entities/edit_point_ui.py
index 146ef65c6..313185776 100644
--- a/pyslvs_ui/entities/edit_point_ui.py
+++ b/pyslvs_ui/entities/edit_point_ui.py
@@ -8,7 +8,7 @@
 # run again.  Do not edit this file unless you know what you are doing.
 
 
-from qtpy import QtCore, QtGui, QtWidgets
+from pyslvs_ui.qt import QtCore, QtGui, QtWidgets
 
 
 class Ui_Dialog(object):
diff --git a/pyslvs_ui/entities/relocate_point.py b/pyslvs_ui/entities/relocate_point.py
index b9d1712b2..86e5dfe4b 100644
--- a/pyslvs_ui/entities/relocate_point.py
+++ b/pyslvs_ui/entities/relocate_point.py
@@ -11,8 +11,8 @@
 
 from typing import TYPE_CHECKING
 from math import isnan, radians
-from qtpy.QtCore import Slot
-from qtpy.QtWidgets import QDialog, QDialogButtonBox
+from pyslvs_ui.qt.QtCore import Slot
+from pyslvs_ui.qt.QtWidgets import QDialog, QDialogButtonBox
 from pyslvs import plap, pllp, Coord
 from pyslvs_ui.widgets import QRotatableView
 from .relocate_point_ui import Ui_Dialog as SubUiDialog
diff --git a/pyslvs_ui/entities/relocate_point_ui.py b/pyslvs_ui/entities/relocate_point_ui.py
index 88d754276..82b79232a 100644
--- a/pyslvs_ui/entities/relocate_point_ui.py
+++ b/pyslvs_ui/entities/relocate_point_ui.py
@@ -8,7 +8,7 @@
 # run again.  Do not edit this file unless you know what you are doing.
 
 
-from qtpy import QtCore, QtGui, QtWidgets
+from pyslvs_ui.qt import QtCore, QtGui, QtWidgets
 
 
 class Ui_Dialog(object):
diff --git a/pyslvs_ui/entities/utility.py b/pyslvs_ui/entities/utility.py
index 732fcd5b8..70233f723 100644
--- a/pyslvs_ui/entities/utility.py
+++ b/pyslvs_ui/entities/utility.py
@@ -7,8 +7,8 @@
 __license__ = "AGPL"
 __email__ = "pyslvs@gmail.com"
 
-from qtpy.QtWidgets import QComboBox
-from qtpy.QtGui import QColor
+from pyslvs_ui.qt.QtWidgets import QComboBox
+from pyslvs_ui.qt.QtGui import QColor
 from pyslvs_ui.graphics import color_icon
 
 
diff --git a/pyslvs_ui/graphics/canvas.py b/pyslvs_ui/graphics/canvas.py
index 2da91f709..372203e49 100644
--- a/pyslvs_ui/graphics/canvas.py
+++ b/pyslvs_ui/graphics/canvas.py
@@ -16,15 +16,15 @@
 from enum import auto, unique, IntEnum
 from math import radians, sin, cos, atan2, hypot, isnan
 from functools import reduce
-from qtpy.QtCore import Slot, Qt, QPointF, QRectF, QSizeF, Signal
-from qtpy.QtWidgets import QWidget, QSizePolicy
-from qtpy.QtGui import (
+from pyslvs_ui.qt.QtCore import Slot, Qt, QPointF, QRectF, QSizeF, Signal
+from pyslvs_ui.qt.QtWidgets import QWidget, QSizePolicy
+from pyslvs_ui.qt.QtGui import (
     QPolygonF, QPainter, QBrush, QPen, QColor, QFont,
     QPainterPath, QImage, QPaintEvent, QMouseEvent,
 )
 from pyslvs import VPoint, edges_view, parse_pos
 from pyslvs.graph import Graph
-from pyslvs_ui.qt_patch import QABCMeta
+from pyslvs_ui.qt import QABCMeta
 from .color import color_num, color_qt, target_path_style
 
 _T = TypeVar('_T')
diff --git a/pyslvs_ui/graphics/chart.py b/pyslvs_ui/graphics/chart.py
index 20f6c06ef..a39bf8db2 100644
--- a/pyslvs_ui/graphics/chart.py
+++ b/pyslvs_ui/graphics/chart.py
@@ -11,8 +11,8 @@
 __email__ = "pyslvs@gmail.com"
 
 from typing import Sequence, List
-from qtpy.QtCore import Qt
-from qtpy.QtWidgets import QWidget, QVBoxLayout, QDialog
+from pyslvs_ui.qt.QtCore import Qt
+from pyslvs_ui.qt.QtWidgets import QWidget, QVBoxLayout, QDialog
 from matplotlib.axes import Axes
 from matplotlib.figure import Figure
 from matplotlib.backends.backend_qt5agg import (
diff --git a/pyslvs_ui/graphics/color.py b/pyslvs_ui/graphics/color.py
index d98fb5f57..5764df39b 100644
--- a/pyslvs_ui/graphics/color.py
+++ b/pyslvs_ui/graphics/color.py
@@ -8,8 +8,8 @@
 __email__ = "pyslvs@gmail.com"
 
 from typing import Tuple, Union
-from qtpy.QtCore import QSize
-from qtpy.QtGui import QColor, QIcon, QPixmap
+from pyslvs_ui.qt.QtCore import QSize
+from pyslvs_ui.qt.QtGui import QColor, QIcon, QPixmap
 from pyslvs import color_names, color_rgb
 
 _Color = Union[str, Tuple[int, int, int], None]
diff --git a/pyslvs_ui/graphics/nx_layout.py b/pyslvs_ui/graphics/nx_layout.py
index 139e28090..f36f35069 100644
--- a/pyslvs_ui/graphics/nx_layout.py
+++ b/pyslvs_ui/graphics/nx_layout.py
@@ -8,8 +8,8 @@
 __email__ = "pyslvs@gmail.com"
 
 from typing import Mapping, Tuple, Optional
-from qtpy.QtCore import Qt, QSize, QPointF
-from qtpy.QtGui import QImage, QPainter, QBrush, QPen, QIcon, QPixmap, QFont
+from pyslvs_ui.qt.QtCore import Qt, QSize, QPointF
+from pyslvs_ui.qt.QtGui import QImage, QPainter, QBrush, QPen, QIcon, QPixmap, QFont
 from pyslvs import edges_view
 from pyslvs.graph import Graph, external_loop_layout
 from pyslvs_ui.info import logger
diff --git a/pyslvs_ui/info/about.py b/pyslvs_ui/info/about.py
index f8dc0843f..8d1a02922 100644
--- a/pyslvs_ui/info/about.py
+++ b/pyslvs_ui/info/about.py
@@ -8,8 +8,8 @@
 __email__ = "pyslvs@gmail.com"
 
 from requests import get as get_url
-from qtpy.QtCore import Qt, QCoreApplication
-from qtpy.QtWidgets import QDialog, QWidget, QProgressDialog
+from pyslvs_ui.qt.QtCore import Qt, QCoreApplication
+from pyslvs_ui.qt.QtWidgets import QDialog, QWidget, QProgressDialog
 from pyslvs_ui import __version__
 from .info import SYS_INFO, ARGUMENTS
 from .logging_handler import logger
diff --git a/pyslvs_ui/info/about_ui.py b/pyslvs_ui/info/about_ui.py
index 36a3daeea..4412315ee 100644
--- a/pyslvs_ui/info/about_ui.py
+++ b/pyslvs_ui/info/about_ui.py
@@ -8,7 +8,7 @@
 # run again.  Do not edit this file unless you know what you are doing.
 
 
-from qtpy import QtCore, QtGui, QtWidgets
+from pyslvs_ui.qt import QtCore, QtGui, QtWidgets
 
 
 class Ui_Dialog(object):
diff --git a/pyslvs_ui/info/info.py b/pyslvs_ui/info/info.py
index 89938278c..fce1f1182 100644
--- a/pyslvs_ui/info/info.py
+++ b/pyslvs_ui/info/info.py
@@ -20,7 +20,7 @@
 from argparse import ArgumentParser
 from dataclasses import dataclass
 from pyslvs_ui import __version__
-from pyslvs_ui.qt_patch import API
+from pyslvs_ui.qt import API
 
 
 def has_module(name: str) -> bool:
diff --git a/pyslvs_ui/info/logging_handler.py b/pyslvs_ui/info/logging_handler.py
index 864bbbd84..db8b07b2f 100644
--- a/pyslvs_ui/info/logging_handler.py
+++ b/pyslvs_ui/info/logging_handler.py
@@ -16,7 +16,7 @@
 from platform import system
 from logging import (DEBUG, INFO, ERROR, basicConfig, getLogger, Handler,
                      StreamHandler, LogRecord)
-from qtpy.QtCore import QObject, Signal
+from pyslvs_ui.qt.QtCore import QObject, Signal
 from .info import ARGUMENTS, SYS_INFO
 
 logger = getLogger('matplotlib')
diff --git a/pyslvs_ui/io/format_editor.py b/pyslvs_ui/io/format_editor.py
index 096d87cea..3532999e0 100644
--- a/pyslvs_ui/io/format_editor.py
+++ b/pyslvs_ui/io/format_editor.py
@@ -9,10 +9,10 @@
 from typing import (
     TYPE_CHECKING, Tuple, List, Sequence, Dict, Mapping, Union, Any,
 )
-from qtpy.QtCore import QObject, QFileInfo
-from qtpy.QtWidgets import QProgressDialog, QMessageBox
+from pyslvs_ui.qt.QtCore import QObject, QFileInfo
+from pyslvs_ui.qt.QtWidgets import QProgressDialog, QMessageBox
 from pyslvs_ui import __version__
-from pyslvs_ui.qt_patch import QABCMeta
+from pyslvs_ui.qt import QABCMeta
 from pyslvs_ui.info import logger
 from .overview import OverviewDialog
 
diff --git a/pyslvs_ui/io/output_option.py b/pyslvs_ui/io/output_option.py
index b3c4c6346..8209743d6 100644
--- a/pyslvs_ui/io/output_option.py
+++ b/pyslvs_ui/io/output_option.py
@@ -12,8 +12,8 @@
 from os.path import isdir, isfile
 from shutil import which
 from subprocess import Popen, DEVNULL
-from qtpy.QtCore import Slot, Qt, QDir
-from qtpy.QtWidgets import (
+from pyslvs_ui.qt.QtCore import Slot, Qt, QDir
+from pyslvs_ui.qt.QtWidgets import (
     QDialog,
     QMessageBox,
     QFileDialog,
@@ -27,9 +27,9 @@
     QSizePolicy,
     QSpacerItem,
 )
-from qtpy.QtGui import QIcon, QPixmap
+from pyslvs_ui.qt.QtGui import QIcon, QPixmap
 from pyslvs import VPoint, VLink
-from pyslvs_ui.qt_patch import QABCMeta
+from pyslvs_ui.qt import QABCMeta
 from .slvs import slvs2_frame, slvs2_part
 from .dxf import DXF_VERSIONS, DXF_VERSIONS_MAP, dxf_frame, dxf_boundary
 from .output_option_ui import Ui_Dialog
diff --git a/pyslvs_ui/io/output_option_ui.py b/pyslvs_ui/io/output_option_ui.py
index b0a42b08c..3aac05fb4 100644
--- a/pyslvs_ui/io/output_option_ui.py
+++ b/pyslvs_ui/io/output_option_ui.py
@@ -8,7 +8,7 @@
 # run again.  Do not edit this file unless you know what you are doing.
 
 
-from qtpy import QtCore, QtGui, QtWidgets
+from pyslvs_ui.qt import QtCore, QtGui, QtWidgets
 
 
 class Ui_Dialog(object):
diff --git a/pyslvs_ui/io/overview.py b/pyslvs_ui/io/overview.py
index 3147adf9d..195a3b3fa 100644
--- a/pyslvs_ui/io/overview.py
+++ b/pyslvs_ui/io/overview.py
@@ -8,9 +8,9 @@
 __email__ = "pyslvs@gmail.com"
 
 from typing import Tuple, Sequence, Mapping, Any
-from qtpy.QtCore import Qt
-from qtpy.QtWidgets import QWidget, QDialog, QListWidgetItem
-from qtpy.QtGui import QPixmap
+from pyslvs_ui.qt.QtCore import Qt
+from pyslvs_ui.qt.QtWidgets import QWidget, QDialog, QListWidgetItem
+from pyslvs_ui.qt.QtGui import QPixmap
 from .overview_ui import Ui_Dialog
 
 _Paths = Sequence[Sequence[Tuple[float, float]]]
diff --git a/pyslvs_ui/io/overview_ui.py b/pyslvs_ui/io/overview_ui.py
index 7e613621a..856fe3031 100644
--- a/pyslvs_ui/io/overview_ui.py
+++ b/pyslvs_ui/io/overview_ui.py
@@ -8,7 +8,7 @@
 # run again.  Do not edit this file unless you know what you are doing.
 
 
-from qtpy import QtCore, QtGui, QtWidgets
+from pyslvs_ui.qt import QtCore, QtGui, QtWidgets
 
 
 class Ui_Dialog(object):
diff --git a/pyslvs_ui/io/preference_ui.py b/pyslvs_ui/io/preference_ui.py
index 6b4e845d7..55c372c7c 100644
--- a/pyslvs_ui/io/preference_ui.py
+++ b/pyslvs_ui/io/preference_ui.py
@@ -8,7 +8,7 @@
 # run again.  Do not edit this file unless you know what you are doing.
 
 
-from qtpy import QtCore, QtGui, QtWidgets
+from pyslvs_ui.qt import QtCore, QtGui, QtWidgets
 
 
 class Ui_Dialog(object):
diff --git a/pyslvs_ui/io/preferences.py b/pyslvs_ui/io/preferences.py
index f44b5ce45..f8732ae1a 100644
--- a/pyslvs_ui/io/preferences.py
+++ b/pyslvs_ui/io/preferences.py
@@ -9,8 +9,8 @@
 
 from typing import Optional
 from dataclasses import fields, Field
-from qtpy.QtCore import Slot
-from qtpy.QtWidgets import (
+from pyslvs_ui.qt.QtCore import Slot
+from pyslvs_ui.qt.QtWidgets import (
     QDialog,
     QLineEdit,
     QSpinBox,
@@ -20,7 +20,7 @@
     QDialogButtonBox,
     QMessageBox,
 )
-from qtpy.QtGui import QCloseEvent
+from pyslvs_ui.qt.QtGui import QCloseEvent
 from pyslvs_ui.info import KERNELS, Kernel
 from pyslvs_ui.widgets import Preferences, MainWindowBase
 from .format_editor import ProjectFormat
diff --git a/pyslvs_ui/io/project.py b/pyslvs_ui/io/project.py
index 64774ce41..cec1f4e9a 100644
--- a/pyslvs_ui/io/project.py
+++ b/pyslvs_ui/io/project.py
@@ -12,18 +12,18 @@
 
 from typing import TYPE_CHECKING, Mapping, Union
 from os.path import join
-from qtpy.QtCore import Slot, QFileInfo, QDateTime
-from qtpy.QtWidgets import (
+from pyslvs_ui.qt.QtCore import Slot, QFileInfo, QDateTime
+from pyslvs_ui.qt.QtWidgets import (
     QUndoView,
     QVBoxLayout,
     QWidget,
     QInputDialog,
     QMessageBox,
 )
-from qtpy.QtGui import QPixmap, QIcon
+from pyslvs_ui.qt.QtGui import QPixmap, QIcon
 from pyslvs import example_list, all_examples
 from pyslvs_ui.info import logger, size_format
-from pyslvs_ui.qt_patch import qt_image_format
+from pyslvs_ui.qt import qt_image_format
 from .project_yaml import YamlEditor
 from .project_pickle import PickleEditor
 from .project_ui import Ui_Form
diff --git a/pyslvs_ui/io/project_pickle.py b/pyslvs_ui/io/project_pickle.py
index e52566f57..24c2dcfad 100644
--- a/pyslvs_ui/io/project_pickle.py
+++ b/pyslvs_ui/io/project_pickle.py
@@ -8,7 +8,7 @@
 __email__ = "pyslvs@gmail.com"
 
 from pickle import load, dump, UnpicklingError, HIGHEST_PROTOCOL
-from qtpy.QtWidgets import QMessageBox
+from pyslvs_ui.qt.QtWidgets import QMessageBox
 from .format_editor import FormatEditor
 
 
diff --git a/pyslvs_ui/io/project_ui.py b/pyslvs_ui/io/project_ui.py
index 21387f028..24bd6f712 100644
--- a/pyslvs_ui/io/project_ui.py
+++ b/pyslvs_ui/io/project_ui.py
@@ -8,7 +8,7 @@
 # run again.  Do not edit this file unless you know what you are doing.
 
 
-from qtpy import QtCore, QtGui, QtWidgets
+from pyslvs_ui.qt import QtCore, QtGui, QtWidgets
 
 
 class Ui_Form(object):
diff --git a/pyslvs_ui/io/project_yaml.py b/pyslvs_ui/io/project_yaml.py
index 3a6c851d1..7879631ad 100644
--- a/pyslvs_ui/io/project_yaml.py
+++ b/pyslvs_ui/io/project_yaml.py
@@ -13,7 +13,7 @@
 from yaml import safe_load, safe_dump
 from yaml.error import YAMLError
 from yaml.representer import SafeRepresenter
-from qtpy.QtWidgets import QMessageBox
+from pyslvs_ui.qt.QtWidgets import QMessageBox
 from .format_editor import FormatEditor, ProjectFormat
 
 # Add a patch for numpy numbers
diff --git a/pyslvs_ui/io/script.py b/pyslvs_ui/io/script.py
index 771cad4a3..ec8acd8f5 100644
--- a/pyslvs_ui/io/script.py
+++ b/pyslvs_ui/io/script.py
@@ -13,8 +13,8 @@
 from qrcode import make
 from qrcode.image.base import BaseImage
 from numpy import full, ndarray, uint8
-from qtpy.QtCore import Slot, Qt
-from qtpy.QtWidgets import (
+from pyslvs_ui.qt.QtCore import Slot, Qt
+from pyslvs_ui.qt.QtWidgets import (
     QApplication,
     QDialog,
     QDialogButtonBox,
@@ -25,7 +25,7 @@
     QLineEdit,
     QSizePolicy,
 )
-from qtpy.QtGui import QIcon, QPixmap, QImage, QWheelEvent, QFont
+from pyslvs_ui.qt.QtGui import QIcon, QPixmap, QImage, QWheelEvent, QFont
 from .script_ui import Ui_Dialog
 
 if TYPE_CHECKING:
diff --git a/pyslvs_ui/io/script_ui.py b/pyslvs_ui/io/script_ui.py
index b474f91fc..950690c56 100644
--- a/pyslvs_ui/io/script_ui.py
+++ b/pyslvs_ui/io/script_ui.py
@@ -8,7 +8,7 @@
 # run again.  Do not edit this file unless you know what you are doing.
 
 
-from qtpy import QtCore, QtGui, QtWidgets
+from pyslvs_ui.qt import QtCore, QtGui, QtWidgets
 
 
 class Ui_Dialog(object):
diff --git a/pyslvs_ui/main_window/__init__.py b/pyslvs_ui/main_window/__init__.py
index da54c2935..787ed1373 100644
--- a/pyslvs_ui/main_window/__init__.py
+++ b/pyslvs_ui/main_window/__init__.py
@@ -20,9 +20,9 @@
 __email__ = "pyslvs@gmail.com"
 
 from typing import Tuple, Sequence
-from qtpy.QtCore import Slot
-from qtpy.QtWidgets import QMessageBox, QInputDialog
-from qtpy.QtGui import QTextCursor, QCloseEvent
+from pyslvs_ui.qt.QtCore import Slot
+from pyslvs_ui.qt.QtWidgets import QMessageBox, QInputDialog
+from pyslvs_ui.qt.QtGui import QTextCursor, QCloseEvent
 from pyslvs_ui.info import XStream, logger
 from .io import IOMethodInterface
 
diff --git a/pyslvs_ui/main_window/actions.py b/pyslvs_ui/main_window/actions.py
index b0215713f..5f8cefc98 100644
--- a/pyslvs_ui/main_window/actions.py
+++ b/pyslvs_ui/main_window/actions.py
@@ -9,8 +9,8 @@
 
 from typing import cast, Sequence, Callable, Union
 from abc import ABC
-from qtpy.QtCore import Slot, QPoint
-from qtpy.QtWidgets import QAction, QApplication, QTableWidget
+from pyslvs_ui.qt.QtCore import Slot, QPoint
+from pyslvs_ui.qt.QtWidgets import QAction, QApplication, QTableWidget
 from pyslvs import VLink
 from pyslvs_ui.graphics import BaseCanvas
 from pyslvs_ui.widgets import EditPointTable, EditLinkTable, Preferences
diff --git a/pyslvs_ui/main_window/entities.py b/pyslvs_ui/main_window/entities.py
index dcccf90b0..edd2b96d2 100644
--- a/pyslvs_ui/main_window/entities.py
+++ b/pyslvs_ui/main_window/entities.py
@@ -15,8 +15,8 @@
 from collections import Counter
 from math import sin, cos, radians, isnan
 from numpy import array
-from qtpy.QtCore import Slot
-from qtpy.QtWidgets import (
+from pyslvs_ui.qt.QtCore import Slot
+from pyslvs_ui.qt.QtWidgets import (
     QDialogButtonBox,
     QDialog,
     QDoubleSpinBox,
diff --git a/pyslvs_ui/main_window/io.py b/pyslvs_ui/main_window/io.py
index 745105463..30f95886c 100644
--- a/pyslvs_ui/main_window/io.py
+++ b/pyslvs_ui/main_window/io.py
@@ -13,15 +13,15 @@
 from abc import ABC
 from dataclasses import Field, fields
 from lark.exceptions import LarkError
-from qtpy.QtCore import Slot, QUrl, QFile, QFileInfo, QMimeData
-from qtpy.QtWidgets import (
+from pyslvs_ui.qt.QtCore import Slot, QUrl, QFile, QFileInfo, QMimeData
+from pyslvs_ui.qt.QtWidgets import (
     QApplication,
     QMessageBox,
     QInputDialog,
     QFileDialog,
     QProgressDialog,
 )
-from qtpy.QtGui import (
+from pyslvs_ui.qt.QtGui import (
     QDesktopServices,
     QPixmap,
     QIcon,
@@ -30,7 +30,7 @@
 )
 from pyslvs import parse_params, VLink
 from pyslvs_ui import __version__
-from pyslvs_ui.qt_patch import qt_image_format, qt_image_suffix
+from pyslvs_ui.qt import qt_image_format, qt_image_suffix
 from pyslvs_ui.info import (
     ARGUMENTS,
     logger,
diff --git a/pyslvs_ui/main_window/solver.py b/pyslvs_ui/main_window/solver.py
index f101a879d..d33b58d63 100644
--- a/pyslvs_ui/main_window/solver.py
+++ b/pyslvs_ui/main_window/solver.py
@@ -11,7 +11,7 @@
 from math import radians, cos, sin
 from abc import ABC, abstractmethod
 from traceback import format_exc
-from qtpy.QtCore import Slot
+from pyslvs_ui.qt.QtCore import Slot
 from pyslvs import (
     edges_view,
     graph2vpoints,
diff --git a/pyslvs_ui/main_window/storage.py b/pyslvs_ui/main_window/storage.py
index 34b90d3d0..2a53a919b 100644
--- a/pyslvs_ui/main_window/storage.py
+++ b/pyslvs_ui/main_window/storage.py
@@ -9,8 +9,8 @@
 
 from typing import Sequence, Dict, Mapping, Optional
 from abc import ABC
-from qtpy.QtCore import Slot
-from qtpy.QtWidgets import (
+from pyslvs_ui.qt.QtCore import Slot
+from pyslvs_ui.qt.QtWidgets import (
     QApplication,
     QListWidgetItem,
     QInputDialog,
diff --git a/pyslvs_ui/qt/QtCore.py b/pyslvs_ui/qt/QtCore.py
new file mode 100644
index 000000000..d73976fa2
--- /dev/null
+++ b/pyslvs_ui/qt/QtCore.py
@@ -0,0 +1,17 @@
+# -*- coding: utf-8 -*-
+
+"""This module mounted Qt.QtCore."""
+
+__author__ = "Yuan Chang"
+__copyright__ = "Copyright (C) 2016-2021"
+__license__ = "AGPL"
+__email__ = "pyslvs@gmail.com"
+
+from .backend import BACKEND
+
+if BACKEND == "PyQt5":
+    from PyQt5.QtCore import *
+else:
+    raise ImportError
+Signal = pyqtSignal
+Slot = pyqtSlot
diff --git a/pyslvs_ui/qt/QtGui.py b/pyslvs_ui/qt/QtGui.py
new file mode 100644
index 000000000..b9a71293e
--- /dev/null
+++ b/pyslvs_ui/qt/QtGui.py
@@ -0,0 +1,15 @@
+# -*- coding: utf-8 -*-
+
+"""This module mounted Qt.QtGui."""
+
+__author__ = "Yuan Chang"
+__copyright__ = "Copyright (C) 2016-2021"
+__license__ = "AGPL"
+__email__ = "pyslvs@gmail.com"
+
+from .backend import BACKEND
+
+if BACKEND == "PyQt5":
+    from PyQt5.QtGui import *
+else:
+    raise ImportError
diff --git a/pyslvs_ui/qt/QtWidgets.py b/pyslvs_ui/qt/QtWidgets.py
new file mode 100644
index 000000000..1fa95dd3d
--- /dev/null
+++ b/pyslvs_ui/qt/QtWidgets.py
@@ -0,0 +1,15 @@
+# -*- coding: utf-8 -*-
+
+"""This module mounted Qt.QtWidgets."""
+
+__author__ = "Yuan Chang"
+__copyright__ = "Copyright (C) 2016-2021"
+__license__ = "AGPL"
+__email__ = "pyslvs@gmail.com"
+
+from .backend import BACKEND
+
+if BACKEND == "PyQt5":
+    from PyQt5.QtWidgets import *
+else:
+    raise ImportError
diff --git a/pyslvs_ui/qt_patch.py b/pyslvs_ui/qt/__init__.py
similarity index 88%
rename from pyslvs_ui/qt_patch.py
rename to pyslvs_ui/qt/__init__.py
index 1fc73513a..5b2afa390 100644
--- a/pyslvs_ui/qt_patch.py
+++ b/pyslvs_ui/qt/__init__.py
@@ -14,10 +14,10 @@
 from abc import ABCMeta
 from os.path import join, dirname, abspath
 from importlib.metadata import version
-from qtpy import API_NAME
-from qtpy.QtCore import QObject, QDir
+from .backend import BACKEND
+from .QtCore import QObject, QDir
 
-API = f"{API_NAME} {version(API_NAME)}"
+API = f"{BACKEND} {version(BACKEND)}"
 qt_image_suffix = []
 qt_image_format = []
 for suffix, name in (
@@ -36,7 +36,7 @@
 qt_image_suffix = tuple(qt_image_suffix)
 qt_image_format = tuple(qt_image_format)
 del suffix, name
-QDir.addSearchPath("icons", join(abspath(dirname(__file__)), "icons"))
+QDir.addSearchPath("icons", abspath(join(dirname(__file__), "..", "icons")))
 
 
 class QABCMeta(type(QObject), ABCMeta):  # type: ignore
diff --git a/pyslvs_ui/qt/backend.py b/pyslvs_ui/qt/backend.py
new file mode 100644
index 000000000..b27885a17
--- /dev/null
+++ b/pyslvs_ui/qt/backend.py
@@ -0,0 +1,16 @@
+# -*- coding: utf-8 -*-
+
+"""This module will try to found the backend of Qt."""
+
+__all__ = ['BACKEND']
+__author__ = "Yuan Chang"
+__copyright__ = "Copyright (C) 2016-2021"
+__license__ = "AGPL"
+__email__ = "pyslvs@gmail.com"
+
+try:
+    import PyQt5.QtCore
+except ImportError:
+    raise ImportError("no Qt backend found (support PyQt5 only)")
+else:
+    BACKEND = "PyQt5"
diff --git a/pyslvs_ui/synthesis/collections/__init__.py b/pyslvs_ui/synthesis/collections/__init__.py
index 53b35896a..6ef3643d4 100644
--- a/pyslvs_ui/synthesis/collections/__init__.py
+++ b/pyslvs_ui/synthesis/collections/__init__.py
@@ -18,8 +18,8 @@
 __email__ = "pyslvs@gmail.com"
 
 from typing import TYPE_CHECKING, List, Tuple, Sequence, Dict, Any
-from qtpy.QtWidgets import QWidget, QVBoxLayout, QTabWidget
-from qtpy.QtGui import QIcon, QPixmap
+from pyslvs_ui.qt.QtWidgets import QWidget, QVBoxLayout, QTabWidget
+from pyslvs_ui.qt.QtGui import QIcon, QPixmap
 from .structure_widget import StructureWidget
 from .configure_widget import ConfigureWidget
 from .dialogs import CollectionsDialog
diff --git a/pyslvs_ui/synthesis/collections/configure_widget.py b/pyslvs_ui/synthesis/collections/configure_widget.py
index c82b14425..96e642db6 100644
--- a/pyslvs_ui/synthesis/collections/configure_widget.py
+++ b/pyslvs_ui/synthesis/collections/configure_widget.py
@@ -15,8 +15,8 @@
 )
 from math import hypot
 import pprint
-from qtpy.QtCore import Signal, Slot
-from qtpy.QtWidgets import (
+from pyslvs_ui.qt.QtCore import Signal, Slot
+from pyslvs_ui.qt.QtWidgets import (
     QWidget,
     QMessageBox,
     QInputDialog,
@@ -24,7 +24,7 @@
     QLabel,
     QApplication,
 )
-from qtpy.QtGui import QMouseEvent
+from pyslvs_ui.qt.QtGui import QMouseEvent
 from pyslvs import edges_view, graph2vpoints, parse_pos
 from pyslvs.graph import Graph
 from pyslvs_ui.graphics import PreviewCanvas
diff --git a/pyslvs_ui/synthesis/collections/configure_widget_ui.py b/pyslvs_ui/synthesis/collections/configure_widget_ui.py
index a5371502a..35044b651 100644
--- a/pyslvs_ui/synthesis/collections/configure_widget_ui.py
+++ b/pyslvs_ui/synthesis/collections/configure_widget_ui.py
@@ -8,7 +8,7 @@
 # run again.  Do not edit this file unless you know what you are doing.
 
 
-from qtpy import QtCore, QtGui, QtWidgets
+from pyslvs_ui.qt import QtCore, QtGui, QtWidgets
 
 
 class Ui_Form(object):
diff --git a/pyslvs_ui/synthesis/collections/dialogs/collections.py b/pyslvs_ui/synthesis/collections/dialogs/collections.py
index 0877886c7..1d51ab388 100644
--- a/pyslvs_ui/synthesis/collections/dialogs/collections.py
+++ b/pyslvs_ui/synthesis/collections/dialogs/collections.py
@@ -9,8 +9,8 @@
 
 from copy import deepcopy
 from typing import Dict, Mapping, Callable, Any
-from qtpy.QtCore import Qt, Slot
-from qtpy.QtWidgets import (
+from pyslvs_ui.qt.QtCore import Qt, Slot
+from pyslvs_ui.qt.QtWidgets import (
     QDialog,
     QDialogButtonBox,
     QInputDialog,
diff --git a/pyslvs_ui/synthesis/collections/dialogs/collections_ui.py b/pyslvs_ui/synthesis/collections/dialogs/collections_ui.py
index a81258167..a883b249c 100644
--- a/pyslvs_ui/synthesis/collections/dialogs/collections_ui.py
+++ b/pyslvs_ui/synthesis/collections/dialogs/collections_ui.py
@@ -8,7 +8,7 @@
 # run again.  Do not edit this file unless you know what you are doing.
 
 
-from qtpy import QtCore, QtGui, QtWidgets
+from pyslvs_ui.qt import QtCore, QtGui, QtWidgets
 
 
 class Ui_Dialog(object):
diff --git a/pyslvs_ui/synthesis/collections/dialogs/customs.py b/pyslvs_ui/synthesis/collections/dialogs/customs.py
index ccee429ce..7ef560ee3 100644
--- a/pyslvs_ui/synthesis/collections/dialogs/customs.py
+++ b/pyslvs_ui/synthesis/collections/dialogs/customs.py
@@ -10,8 +10,8 @@
 __email__ = "pyslvs@gmail.com"
 
 from typing import TYPE_CHECKING
-from qtpy.QtCore import Slot, Qt
-from qtpy.QtWidgets import QDialog
+from pyslvs_ui.qt.QtCore import Slot, Qt
+from pyslvs_ui.qt.QtWidgets import QDialog
 from .customs_ui import Ui_Dialog
 
 if TYPE_CHECKING:
diff --git a/pyslvs_ui/synthesis/collections/dialogs/customs_ui.py b/pyslvs_ui/synthesis/collections/dialogs/customs_ui.py
index a157dce20..2e5a20752 100644
--- a/pyslvs_ui/synthesis/collections/dialogs/customs_ui.py
+++ b/pyslvs_ui/synthesis/collections/dialogs/customs_ui.py
@@ -8,7 +8,7 @@
 # run again.  Do not edit this file unless you know what you are doing.
 
 
-from qtpy import QtCore, QtGui, QtWidgets
+from pyslvs_ui.qt import QtCore, QtGui, QtWidgets
 
 
 class Ui_Dialog(object):
diff --git a/pyslvs_ui/synthesis/collections/dialogs/targets.py b/pyslvs_ui/synthesis/collections/dialogs/targets.py
index 2379d693d..4d7e3ffcb 100644
--- a/pyslvs_ui/synthesis/collections/dialogs/targets.py
+++ b/pyslvs_ui/synthesis/collections/dialogs/targets.py
@@ -10,8 +10,8 @@
 __email__ = "pyslvs@gmail.com"
 
 from typing import List, Iterable, Iterator
-from qtpy.QtCore import Slot, Qt
-from qtpy.QtWidgets import QWidget, QDialog, QListWidget, QListWidgetItem
+from pyslvs_ui.qt.QtCore import Slot, Qt
+from pyslvs_ui.qt.QtWidgets import QWidget, QDialog, QListWidget, QListWidgetItem
 from .targets_ui import Ui_Dialog
 
 
diff --git a/pyslvs_ui/synthesis/collections/dialogs/targets_ui.py b/pyslvs_ui/synthesis/collections/dialogs/targets_ui.py
index fab91d071..6b6caa7e2 100644
--- a/pyslvs_ui/synthesis/collections/dialogs/targets_ui.py
+++ b/pyslvs_ui/synthesis/collections/dialogs/targets_ui.py
@@ -8,7 +8,7 @@
 # run again.  Do not edit this file unless you know what you are doing.
 
 
-from qtpy import QtCore, QtGui, QtWidgets
+from pyslvs_ui.qt import QtCore, QtGui, QtWidgets
 
 
 class Ui_Dialog(object):
diff --git a/pyslvs_ui/synthesis/collections/structure_widget.py b/pyslvs_ui/synthesis/collections/structure_widget.py
index 070042ee8..0eacd7dd4 100644
--- a/pyslvs_ui/synthesis/collections/structure_widget.py
+++ b/pyslvs_ui/synthesis/collections/structure_widget.py
@@ -10,8 +10,8 @@
 __email__ = "pyslvs@gmail.com"
 
 from typing import TYPE_CHECKING, List, Tuple, Sequence, Dict, Iterable
-from qtpy.QtCore import Signal, Slot, Qt, QSize, QPointF, QCoreApplication
-from qtpy.QtWidgets import (
+from pyslvs_ui.qt.QtCore import Signal, Slot, Qt, QSize, QPointF, QCoreApplication
+from pyslvs_ui.qt.QtWidgets import (
     QMessageBox,
     QProgressDialog,
     QListWidgetItem,
@@ -19,7 +19,7 @@
     QWidget,
     QApplication,
 )
-from qtpy.QtGui import QImage, QPainter, QPixmap
+from pyslvs_ui.qt.QtGui import QImage, QPainter, QPixmap
 from pyslvs.graph import (
     Graph,
     link_assortment,
@@ -28,7 +28,7 @@
     is_planar,
     external_loop_layout,
 )
-from pyslvs_ui.qt_patch import qt_image_format
+from pyslvs_ui.qt import qt_image_format
 from pyslvs_ui.graphics import graph2icon, engine_picker, engines
 from .dialogs.targets import TargetsDialog
 from .structure_widget_ui import Ui_Form
diff --git a/pyslvs_ui/synthesis/collections/structure_widget_ui.py b/pyslvs_ui/synthesis/collections/structure_widget_ui.py
index 8eb020dbd..a464c5745 100644
--- a/pyslvs_ui/synthesis/collections/structure_widget_ui.py
+++ b/pyslvs_ui/synthesis/collections/structure_widget_ui.py
@@ -8,7 +8,7 @@
 # run again.  Do not edit this file unless you know what you are doing.
 
 
-from qtpy import QtCore, QtGui, QtWidgets
+from pyslvs_ui.qt import QtCore, QtGui, QtWidgets
 
 
 class Ui_Form(object):
diff --git a/pyslvs_ui/synthesis/dimensional_synthesis/__init__.py b/pyslvs_ui/synthesis/dimensional_synthesis/__init__.py
index 40861e89a..5853892f1 100644
--- a/pyslvs_ui/synthesis/dimensional_synthesis/__init__.py
+++ b/pyslvs_ui/synthesis/dimensional_synthesis/__init__.py
@@ -24,9 +24,9 @@
 from pyslvs import expr_solving, parse_pos, parse_vpoints, t_config
 from pyslvs.optimization import norm_path
 from pyslvs.metaheuristics import AlgorithmType, default
-from qtpy.QtCore import QModelIndex, Slot
-from qtpy.QtGui import QIcon, QPixmap
-from qtpy.QtWidgets import (
+from pyslvs_ui.qt.QtCore import QModelIndex, Slot
+from pyslvs_ui.qt.QtGui import QIcon, QPixmap
+from pyslvs_ui.qt.QtWidgets import (
     QApplication,
     QDoubleSpinBox,
     QHeaderView,
diff --git a/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/chart.py b/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/chart.py
index df9782d5d..fd608dc4c 100644
--- a/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/chart.py
+++ b/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/chart.py
@@ -9,8 +9,8 @@
 
 from typing import Sequence, Mapping, Any
 from numpy import array
-from qtpy.QtCore import Qt, QSize
-from qtpy.QtWidgets import QDialog, QVBoxLayout, QTabWidget, QWidget
+from pyslvs_ui.qt.QtCore import Qt, QSize
+from pyslvs_ui.qt.QtWidgets import QDialog, QVBoxLayout, QTabWidget, QWidget
 from pyslvs_ui.graphics import DataChart
 
 
diff --git a/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/edit_path.py b/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/edit_path.py
index 8cb2044a3..1bf2b8933 100644
--- a/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/edit_path.py
+++ b/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/edit_path.py
@@ -12,8 +12,8 @@
 from typing import TYPE_CHECKING
 from math import cos, sin, atan2, radians, hypot
 from numpy import ndarray, array, linspace, concatenate, full_like
-from qtpy.QtCore import Slot, Qt
-from qtpy.QtWidgets import QDialog
+from pyslvs_ui.qt.QtCore import Slot, Qt
+from pyslvs_ui.qt.QtWidgets import QDialog
 from pyslvs import efd_fitting
 from pyslvs_ui.graphics import DataChartDialog
 from pyslvs_ui.info import HAS_SCIPY
diff --git a/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/edit_path_ui.py b/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/edit_path_ui.py
index eaf23fb38..f0448d37c 100644
--- a/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/edit_path_ui.py
+++ b/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/edit_path_ui.py
@@ -8,7 +8,7 @@
 # run again.  Do not edit this file unless you know what you are doing.
 
 
-from qtpy import QtCore, QtGui, QtWidgets
+from pyslvs_ui.qt import QtCore, QtGui, QtWidgets
 
 
 class Ui_Dialog(object):
diff --git a/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/options.py b/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/options.py
index 8d19035d4..4433a5aae 100644
--- a/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/options.py
+++ b/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/options.py
@@ -8,8 +8,8 @@
 __email__ = "pyslvs@gmail.com"
 
 from typing import cast, Mapping, Union
-from qtpy.QtCore import Slot, Qt
-from qtpy.QtWidgets import (
+from pyslvs_ui.qt.QtCore import Slot, Qt
+from pyslvs_ui.qt.QtWidgets import (
     QDialog,
     QTableWidgetItem,
     QDoubleSpinBox,
diff --git a/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/options_ui.py b/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/options_ui.py
index 5776ba15f..aca86fa89 100644
--- a/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/options_ui.py
+++ b/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/options_ui.py
@@ -8,7 +8,7 @@
 # run again.  Do not edit this file unless you know what you are doing.
 
 
-from qtpy import QtCore, QtGui, QtWidgets
+from pyslvs_ui.qt import QtCore, QtGui, QtWidgets
 
 
 class Ui_Dialog(object):
diff --git a/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/preview.py b/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/preview.py
index 9a8d0d716..48a1259de 100644
--- a/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/preview.py
+++ b/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/preview.py
@@ -11,9 +11,9 @@
 from itertools import chain
 from typing import Tuple, List, Dict, Sequence, Any
 from numpy import linspace, concatenate
-from qtpy.QtCore import Slot, Qt, QTimer, QPointF, QRectF, QSizeF
-from qtpy.QtWidgets import QDialog, QWidget
-from qtpy.QtGui import QPen, QFont, QPaintEvent
+from pyslvs_ui.qt.QtCore import Slot, Qt, QTimer, QPointF, QRectF, QSizeF
+from pyslvs_ui.qt.QtWidgets import QDialog, QWidget
+from pyslvs_ui.qt.QtGui import QPen, QFont, QPaintEvent
 from pyslvs import (
     color_rgb, get_vlinks, VPoint, VLink, parse_vpoints, efd_fitting,
 )
diff --git a/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/preview_ui.py b/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/preview_ui.py
index a06094d2c..35e6a3eb6 100644
--- a/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/preview_ui.py
+++ b/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/preview_ui.py
@@ -8,7 +8,7 @@
 # run again.  Do not edit this file unless you know what you are doing.
 
 
-from qtpy import QtCore, QtGui, QtWidgets
+from pyslvs_ui.qt import QtCore, QtGui, QtWidgets
 
 
 class Ui_Dialog(object):
diff --git a/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/progress.py b/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/progress.py
index 51ab53986..3e6821828 100644
--- a/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/progress.py
+++ b/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/progress.py
@@ -8,8 +8,8 @@
 __email__ = "pyslvs@gmail.com"
 
 from typing import List, Dict, Any
-from qtpy.QtCore import Qt, QTimer, Signal, Slot
-from qtpy.QtWidgets import QDialog
+from pyslvs_ui.qt.QtCore import Qt, QTimer, Signal, Slot
+from pyslvs_ui.qt.QtWidgets import QDialog
 from pyslvs.metaheuristics import AlgorithmType
 from pyslvs_ui.info import logger
 from .progress_ui import Ui_Dialog
diff --git a/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/progress_ui.py b/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/progress_ui.py
index 9748ce1d0..9a8b3148f 100644
--- a/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/progress_ui.py
+++ b/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/progress_ui.py
@@ -8,7 +8,7 @@
 # run again.  Do not edit this file unless you know what you are doing.
 
 
-from qtpy import QtCore, QtGui, QtWidgets
+from pyslvs_ui.qt import QtCore, QtGui, QtWidgets
 
 
 class Ui_Dialog(object):
diff --git a/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/thread.py b/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/thread.py
index fb988980e..4f5ddd80e 100644
--- a/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/thread.py
+++ b/pyslvs_ui/synthesis/dimensional_synthesis/dialogs/thread.py
@@ -10,8 +10,8 @@
 from typing import cast, Dict, Any
 from time import process_time
 from platform import system, release, machine, processor
-from qtpy.QtCore import Signal
-from qtpy.QtWidgets import QWidget
+from pyslvs_ui.qt.QtCore import Signal
+from pyslvs_ui.qt.QtWidgets import QWidget
 from pyslvs.optimization import FPlanar, FConfig
 from pyslvs.metaheuristics import algorithm, AlgorithmType, Setting
 from pyslvs_ui.info import logger
diff --git a/pyslvs_ui/synthesis/dimensional_synthesis/dimension_widget_ui.py b/pyslvs_ui/synthesis/dimensional_synthesis/dimension_widget_ui.py
index 6deeca32a..2f8e2c20c 100644
--- a/pyslvs_ui/synthesis/dimensional_synthesis/dimension_widget_ui.py
+++ b/pyslvs_ui/synthesis/dimensional_synthesis/dimension_widget_ui.py
@@ -8,7 +8,7 @@
 # run again.  Do not edit this file unless you know what you are doing.
 
 
-from qtpy import QtCore, QtGui, QtWidgets
+from pyslvs_ui.qt import QtCore, QtGui, QtWidgets
 
 
 class Ui_Form(object):
diff --git a/pyslvs_ui/synthesis/structure_synthesis/__init__.py b/pyslvs_ui/synthesis/structure_synthesis/__init__.py
index 0c2df3c59..90b585445 100644
--- a/pyslvs_ui/synthesis/structure_synthesis/__init__.py
+++ b/pyslvs_ui/synthesis/structure_synthesis/__init__.py
@@ -14,7 +14,7 @@
 
 from typing import TYPE_CHECKING, List, Sequence, Dict, Optional
 from time import process_time
-from qtpy.QtCore import (
+from pyslvs_ui.qt.QtCore import (
     Slot,
     Qt,
     QSize,
@@ -22,7 +22,7 @@
     QPoint,
     QPointF,
 )
-from qtpy.QtWidgets import (
+from pyslvs_ui.qt.QtWidgets import (
     QWidget,
     QMenu,
     QAction,
@@ -35,9 +35,9 @@
     QTreeWidgetItem,
     QHeaderView,
 )
-from qtpy.QtGui import QIcon, QPixmap, QImage, QPainter
+from pyslvs_ui.qt.QtGui import QIcon, QPixmap, QImage, QPainter
 from pyslvs.graph import Graph, link_assortment, contracted_link_assortment
-from pyslvs_ui.qt_patch import qt_image_format
+from pyslvs_ui.qt import qt_image_format
 from pyslvs_ui.graphics import graph2icon, engines
 from .thread import assortment_eval, LinkThread, GraphThread
 from .structure_widget_ui import Ui_Form
diff --git a/pyslvs_ui/synthesis/structure_synthesis/structure_widget_ui.py b/pyslvs_ui/synthesis/structure_synthesis/structure_widget_ui.py
index 86ac8140d..d185e9296 100644
--- a/pyslvs_ui/synthesis/structure_synthesis/structure_widget_ui.py
+++ b/pyslvs_ui/synthesis/structure_synthesis/structure_widget_ui.py
@@ -8,7 +8,7 @@
 # run again.  Do not edit this file unless you know what you are doing.
 
 
-from qtpy import QtCore, QtGui, QtWidgets
+from pyslvs_ui.qt import QtCore, QtGui, QtWidgets
 
 
 class Ui_Form(object):
diff --git a/pyslvs_ui/synthesis/structure_synthesis/thread.py b/pyslvs_ui/synthesis/structure_synthesis/thread.py
index e31070748..3f0a7d59d 100644
--- a/pyslvs_ui/synthesis/structure_synthesis/thread.py
+++ b/pyslvs_ui/synthesis/structure_synthesis/thread.py
@@ -8,8 +8,8 @@
 __email__ = "pyslvs@gmail.com"
 
 from typing import Sequence, Dict, List
-from qtpy.QtCore import Signal
-from qtpy.QtWidgets import QWidget, QTreeWidgetItem
+from pyslvs_ui.qt.QtCore import Signal
+from pyslvs_ui.qt.QtWidgets import QWidget, QTreeWidgetItem
 from pyslvs.graph import (
     link_synthesis,
     contracted_link_synthesis,
diff --git a/pyslvs_ui/synthesis/thread.py b/pyslvs_ui/synthesis/thread.py
index 202b4eb83..5d5ae08df 100644
--- a/pyslvs_ui/synthesis/thread.py
+++ b/pyslvs_ui/synthesis/thread.py
@@ -8,9 +8,9 @@
 __email__ = "pyslvs@gmail.com"
 
 from abc import abstractmethod
-from qtpy.QtCore import Slot, QThread
-from qtpy.QtWidgets import QWidget
-from pyslvs_ui.qt_patch import QABCMeta
+from pyslvs_ui.qt.QtCore import Slot, QThread
+from pyslvs_ui.qt.QtWidgets import QWidget
+from pyslvs_ui.qt import QABCMeta
 
 
 class BaseThread(QThread, metaclass=QABCMeta):
diff --git a/pyslvs_ui/widgets/canvas.py b/pyslvs_ui/widgets/canvas.py
index 59a0874ab..945e44cc1 100644
--- a/pyslvs_ui/widgets/canvas.py
+++ b/pyslvs_ui/widgets/canvas.py
@@ -13,9 +13,9 @@
 from typing import (
     cast, TYPE_CHECKING, List, Tuple, Sequence, Union, Mapping,
 )
-from qtpy.QtCore import Slot, Qt, QRectF, QPoint, QPointF, QSizeF
-from qtpy.QtWidgets import QApplication, QToolTip, QWidget
-from qtpy.QtGui import QRegion, QCursor, QWheelEvent, QPixmap, QImage
+from pyslvs_ui.qt.QtCore import Slot, Qt, QRectF, QPoint, QPointF, QSizeF
+from pyslvs_ui.qt.QtWidgets import QApplication, QToolTip, QWidget
+from pyslvs_ui.qt.QtGui import QRegion, QCursor, QWheelEvent, QPixmap, QImage
 from pyslvs import VJoint
 from .canvas_base import MainCanvasBase, FreeMode, SelectMode, ZoomBy
 
diff --git a/pyslvs_ui/widgets/canvas_base.py b/pyslvs_ui/widgets/canvas_base.py
index d0f520270..844dac670 100644
--- a/pyslvs_ui/widgets/canvas_base.py
+++ b/pyslvs_ui/widgets/canvas_base.py
@@ -14,9 +14,9 @@
 from enum import IntEnum, auto, unique
 from dataclasses import dataclass, field
 from math import degrees, sin, cos, atan2, hypot
-from qtpy.QtCore import Signal, Slot, Qt, QRectF, QPoint, QPointF, QLineF
-from qtpy.QtWidgets import QApplication
-from qtpy.QtGui import QPolygonF, QFont, QPen, QColor, QPaintEvent, QMouseEvent
+from pyslvs_ui.qt.QtCore import Signal, Slot, Qt, QRectF, QPoint, QPointF, QLineF
+from pyslvs_ui.qt.QtWidgets import QApplication
+from pyslvs_ui.qt.QtGui import QPolygonF, QFont, QPen, QColor, QPaintEvent, QMouseEvent
 from pyslvs import VJoint, VPoint, VLink
 from pyslvs_ui.graphics import (
     convex_hull, BaseCanvas, color_qt, LINK_COLOR, RangeDetector,
diff --git a/pyslvs_ui/widgets/inputs/__init__.py b/pyslvs_ui/widgets/inputs/__init__.py
index 6be9181a3..2e3d4d4fb 100644
--- a/pyslvs_ui/widgets/inputs/__init__.py
+++ b/pyslvs_ui/widgets/inputs/__init__.py
@@ -18,12 +18,12 @@
 from copy import copy
 from numpy import array, ndarray, hypot, arctan2, vstack, hstack
 from numpy.fft import fft
-from qtpy.QtCore import Signal, Slot, QTimer
-from qtpy.QtWidgets import (
+from pyslvs_ui.qt.QtCore import Signal, Slot, QTimer
+from pyslvs_ui.qt.QtWidgets import (
     QWidget, QMessageBox, QInputDialog, QListWidgetItem, QApplication,
     QCheckBox,
 )
-from qtpy.QtGui import QIcon, QPixmap
+from pyslvs_ui.qt.QtGui import QIcon, QPixmap
 from pyslvs import VJoint
 from pyslvs.optimization import (
     curvature, derivative, path_signature, norm_path, norm_pca,
diff --git a/pyslvs_ui/widgets/inputs/animation.py b/pyslvs_ui/widgets/inputs/animation.py
index c8679220b..3474ea9bf 100644
--- a/pyslvs_ui/widgets/inputs/animation.py
+++ b/pyslvs_ui/widgets/inputs/animation.py
@@ -4,12 +4,12 @@
 
 from typing import Sequence, Tuple, Mapping
 from math import cos, sin, atan2, hypot, degrees
-from qtpy.QtCore import Qt, Slot, QTimer
-from qtpy.QtWidgets import (
+from pyslvs_ui.qt.QtCore import Qt, Slot, QTimer
+from pyslvs_ui.qt.QtWidgets import (
     QWidget, QDialog, QVBoxLayout, QHBoxLayout, QSlider, QPushButton, QLabel,
     QSpacerItem, QSizePolicy, QDoubleSpinBox, QComboBox,
 )
-from qtpy.QtGui import QPaintEvent, QPen, QPixmap, QIcon
+from pyslvs_ui.qt.QtGui import QPaintEvent, QPen, QPixmap, QIcon
 from numpy import array, ndarray, isclose, isnan
 from pyslvs import VPoint, VLink, VJoint
 from pyslvs.optimization import derivative
diff --git a/pyslvs_ui/widgets/inputs/inputs_ui.py b/pyslvs_ui/widgets/inputs/inputs_ui.py
index c6231f2dd..90790da5e 100644
--- a/pyslvs_ui/widgets/inputs/inputs_ui.py
+++ b/pyslvs_ui/widgets/inputs/inputs_ui.py
@@ -8,7 +8,7 @@
 # run again.  Do not edit this file unless you know what you are doing.
 
 
-from qtpy import QtCore, QtGui, QtWidgets
+from pyslvs_ui.qt import QtCore, QtGui, QtWidgets
 
 
 class Ui_Form(object):
diff --git a/pyslvs_ui/widgets/inputs/rotatable.py b/pyslvs_ui/widgets/inputs/rotatable.py
index c794e7cd0..ac1574191 100644
--- a/pyslvs_ui/widgets/inputs/rotatable.py
+++ b/pyslvs_ui/widgets/inputs/rotatable.py
@@ -7,8 +7,8 @@
 __license__ = "AGPL"
 __email__ = "pyslvs@gmail.com"
 
-from qtpy.QtCore import Qt, Signal, Slot, QSize
-from qtpy.QtWidgets import QWidget, QDial, QGraphicsView, QGraphicsScene
+from pyslvs_ui.qt.QtCore import Qt, Signal, Slot, QSize
+from pyslvs_ui.qt.QtWidgets import QWidget, QDial, QGraphicsView, QGraphicsScene
 
 
 class QRotatableView(QGraphicsView):
diff --git a/pyslvs_ui/widgets/main_abc.py b/pyslvs_ui/widgets/main_abc.py
index d2f1b7465..31a1df2e4 100644
--- a/pyslvs_ui/widgets/main_abc.py
+++ b/pyslvs_ui/widgets/main_abc.py
@@ -11,11 +11,11 @@
 
 from typing import Tuple, List, Sequence, Dict, Mapping, Optional, Any
 from abc import abstractmethod
-from qtpy.QtCore import Qt, QPoint
-from qtpy.QtWidgets import QMainWindow
+from pyslvs_ui.qt.QtCore import Qt, QPoint
+from pyslvs_ui.qt.QtWidgets import QMainWindow
 from pyslvs import VPoint
 from pyslvs.graph import Graph
-from pyslvs_ui.qt_patch import QABCMeta
+from pyslvs_ui.qt import QABCMeta
 from .main_ui import Ui_MainWindow
 
 _Coord = Tuple[float, float]
diff --git a/pyslvs_ui/widgets/main_base.py b/pyslvs_ui/widgets/main_base.py
index effbb3308..629adae5f 100644
--- a/pyslvs_ui/widgets/main_base.py
+++ b/pyslvs_ui/widgets/main_base.py
@@ -20,8 +20,8 @@
 from abc import abstractmethod, ABC
 from enum import Flag, auto, unique
 from dataclasses import dataclass, field, fields, Field, astuple
-from qtpy.QtCore import Slot, Qt, QPoint, QDir, QSettings
-from qtpy.QtWidgets import (
+from pyslvs_ui.qt.QtCore import Slot, Qt, QPoint, QDir, QSettings
+from pyslvs_ui.qt.QtWidgets import (
     QAction,
     QWidget,
     QMenu,
@@ -29,7 +29,7 @@
     QPushButton,
     QUndoStack,
 )
-from qtpy.QtGui import QIcon, QPixmap
+from pyslvs_ui.qt.QtGui import QIcon, QPixmap
 from pyslvs import VPoint, VLink, color_rgb
 from pyslvs_ui.info import ARGUMENTS, logger, Kernel
 from pyslvs_ui.io import ProjectWidget, ProjectFormat
diff --git a/pyslvs_ui/widgets/main_ui.py b/pyslvs_ui/widgets/main_ui.py
index 91b989b5b..3aedfe406 100644
--- a/pyslvs_ui/widgets/main_ui.py
+++ b/pyslvs_ui/widgets/main_ui.py
@@ -8,7 +8,7 @@
 # run again.  Do not edit this file unless you know what you are doing.
 
 
-from qtpy import QtCore, QtGui, QtWidgets
+from pyslvs_ui.qt import QtCore, QtGui, QtWidgets
 
 
 class Ui_MainWindow(object):
diff --git a/pyslvs_ui/widgets/tables.py b/pyslvs_ui/widgets/tables.py
index 836325c23..b9dd7178a 100644
--- a/pyslvs_ui/widgets/tables.py
+++ b/pyslvs_ui/widgets/tables.py
@@ -18,8 +18,8 @@
     TYPE_CHECKING, Tuple, List, Iterator, Sequence, Union, Optional,
     TypeVar, Generic,
 )
-from qtpy.QtCore import Signal, Qt, QTimer, Slot
-from qtpy.QtWidgets import (
+from pyslvs_ui.qt.QtCore import Signal, Qt, QTimer, Slot
+from pyslvs_ui.qt.QtWidgets import (
     QTableWidget,
     QSizePolicy,
     QAbstractItemView,
@@ -30,9 +30,9 @@
     QLabel,
     QWidget,
 )
-from qtpy.QtGui import QKeyEvent
+from pyslvs_ui.qt.QtGui import QKeyEvent
 from pyslvs import EStack, VPoint, VLink, PointArgs, LinkArgs
-from pyslvs_ui.qt_patch import QABCMeta
+from pyslvs_ui.qt import QABCMeta
 from pyslvs_ui.graphics import color_icon
 
 if TYPE_CHECKING:
diff --git a/pyslvs_ui/widgets/undo_redo.py b/pyslvs_ui/widgets/undo_redo.py
index 0e162db26..7506577eb 100644
--- a/pyslvs_ui/widgets/undo_redo.py
+++ b/pyslvs_ui/widgets/undo_redo.py
@@ -24,8 +24,8 @@
     Generic, Optional, TypeVar,
 )
 from abc import abstractmethod
-from qtpy.QtCore import Qt
-from qtpy.QtWidgets import (
+from pyslvs_ui.qt.QtCore import Qt
+from pyslvs_ui.qt.QtWidgets import (
     QUndoCommand,
     QTableWidgetItem,
     QListWidget,
@@ -33,9 +33,9 @@
     QLineEdit,
     QWidget,
 )
-from qtpy.QtGui import QIcon, QPixmap
+from pyslvs_ui.qt.QtGui import QIcon, QPixmap
 from pyslvs import VJoint, VPoint, VLink, color_rgb, PointArgs, LinkArgs
-from pyslvs_ui.qt_patch import QABCMeta
+from pyslvs_ui.qt import QABCMeta
 from .tables import BaseTableWidget, PointTableWidget, LinkTableWidget
 
 _Coord = Tuple[float, float]
diff --git a/scripts/uic.py b/scripts/uic.py
index abe6ab0cd..883a92b50 100644
--- a/scripts/uic.py
+++ b/scripts/uic.py
@@ -10,12 +10,14 @@
 from os import walk
 from os.path import join
 from re import sub
-from qtpy import PYQT5
 
-if PYQT5:
+try:
     from PyQt5.uic import compileUi
-else:
-    raise ModuleNotFoundError("no compiler found")
+except ImportError:
+    try:
+        from PyQt6.uic import compileUi
+    except ImportError:
+        raise ModuleNotFoundError("no compiler found")
 
 
 def gen_ui():
@@ -36,8 +38,8 @@ def gen_ui():
                 f.seek(0)
                 script_new = sub(r"from [\w.]+ import [\w]+_rc\n", "",
                                  f.read()
-                                 .replace("from PyQt5", "from qtpy")
-                                 .replace("from PySide2", "from qtpy")
+                                 .replace("from PyQt5", "from pyslvs_ui.qt")
+                                 .replace("from PyQt6", "from pyslvs_ui.qt")
                                  .replace(root + "/", ""))
                 f.seek(0)
                 f.truncate()
diff --git a/setup.cfg b/setup.cfg
index d15bf96e3..9f6ae137c 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -28,7 +28,6 @@ packages = find:
 python_requires = >=3.8
 install_requires =
     requests
-    qtpy
     pyqt5
     ezdxf
     numpy