diff --git a/kindlecomicconverter/KCC_gui.py b/kindlecomicconverter/KCC_gui.py
index b500ecc..6f6f90b 100644
--- a/kindlecomicconverter/KCC_gui.py
+++ b/kindlecomicconverter/KCC_gui.py
@@ -26,7 +26,7 @@ from time import sleep
 from shutil import move, rmtree
 from subprocess import STDOUT, PIPE
 # noinspection PyUnresolvedReferences
-from PyQt5 import QtGui, QtCore, QtWidgets, QtNetwork
+from PyQt6 import QtGui, QtCore, QtWidgets, QtNetwork
 from xml.sax.saxutils import escape
 from psutil import Popen, Process
 from copy import copy
@@ -51,7 +51,7 @@ class QApplicationMessaging(QtWidgets.QApplication):
         self._timeout = 1000
         self._locked = False
         socket = QtNetwork.QLocalSocket(self)
-        socket.connectToServer(self._key, QtCore.QIODevice.WriteOnly)
+        socket.connectToServer(self._key, QtCore.QIODeviceBase.OpenModeFlag.WriteOnly)
         if not socket.waitForConnected(self._timeout):
             self._server = QtNetwork.QLocalServer(self)
             self._server.newConnection.connect(self.handleMessage)
@@ -65,7 +65,7 @@ class QApplicationMessaging(QtWidgets.QApplication):
             self._server.close()
 
     def event(self, e):
-        if e.type() == QtCore.QEvent.FileOpen:
+        if e.type() == QtCore.QEvent.Type.FileOpen:
             self.messageFromOtherInstance.emit(bytes(e.file(), 'UTF-8'))
             return True
         else:
@@ -81,7 +81,7 @@ class QApplicationMessaging(QtWidgets.QApplication):
 
     def sendMessage(self, message):
         socket = QtNetwork.QLocalSocket(self)
-        socket.connectToServer(self._key, QtCore.QIODevice.WriteOnly)
+        socket.connectToServer(self._key, QtCore.QIODeviceBase.OpenModeFlag.WriteOnly)
         socket.waitForConnected(self._timeout)
         socket.write(bytes(message, 'UTF-8'))
         socket.waitForBytesWritten(self._timeout)
@@ -101,34 +101,34 @@ class QMainWindowKCC(QtWidgets.QMainWindow):
 class Icons:
     def __init__(self):
         self.deviceKindle = QtGui.QIcon()
-        self.deviceKindle.addPixmap(QtGui.QPixmap(":/Devices/icons/Kindle.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
+        self.deviceKindle.addPixmap(QtGui.QPixmap(":/Devices/icons/Kindle.png"), QtGui.QIcon.Mode.Normal, QtGui.QIcon.State.Off)
         self.deviceKobo = QtGui.QIcon()
-        self.deviceKobo.addPixmap(QtGui.QPixmap(":/Devices/icons/Kobo.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
+        self.deviceKobo.addPixmap(QtGui.QPixmap(":/Devices/icons/Kobo.png"), QtGui.QIcon.Mode.Normal, QtGui.QIcon.State.Off)
         self.deviceOther = QtGui.QIcon()
-        self.deviceOther.addPixmap(QtGui.QPixmap(":/Devices/icons/Other.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
+        self.deviceOther.addPixmap(QtGui.QPixmap(":/Devices/icons/Other.png"), QtGui.QIcon.Mode.Normal, QtGui.QIcon.State.Off)
 
         self.MOBIFormat = QtGui.QIcon()
-        self.MOBIFormat.addPixmap(QtGui.QPixmap(":/Formats/icons/MOBI.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
+        self.MOBIFormat.addPixmap(QtGui.QPixmap(":/Formats/icons/MOBI.png"), QtGui.QIcon.Mode.Normal, QtGui.QIcon.State.Off)
         self.CBZFormat = QtGui.QIcon()
-        self.CBZFormat.addPixmap(QtGui.QPixmap(":/Formats/icons/CBZ.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
+        self.CBZFormat.addPixmap(QtGui.QPixmap(":/Formats/icons/CBZ.png"), QtGui.QIcon.Mode.Normal, QtGui.QIcon.State.Off)
         self.EPUBFormat = QtGui.QIcon()
-        self.EPUBFormat.addPixmap(QtGui.QPixmap(":/Formats/icons/EPUB.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
+        self.EPUBFormat.addPixmap(QtGui.QPixmap(":/Formats/icons/EPUB.png"), QtGui.QIcon.Mode.Normal, QtGui.QIcon.State.Off)
         self.KFXFormat = QtGui.QIcon()
-        self.KFXFormat.addPixmap(QtGui.QPixmap(":/Formats/icons/KFX.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
+        self.KFXFormat.addPixmap(QtGui.QPixmap(":/Formats/icons/KFX.png"), QtGui.QIcon.Mode.Normal, QtGui.QIcon.State.Off)
         self.MOBIEPUBFormat = QtGui.QIcon()
-        self.MOBIEPUBFormat.addPixmap(QtGui.QPixmap(":/Formats/icons/MOBI.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
+        self.MOBIEPUBFormat.addPixmap(QtGui.QPixmap(":/Formats/icons/MOBI.png"), QtGui.QIcon.Mode.Normal, QtGui.QIcon.State.Off)
         self.EPUB200MBFormat = QtGui.QIcon()
-        self.EPUB200MBFormat.addPixmap(QtGui.QPixmap(":/Formats/icons/EPUB.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
+        self.EPUB200MBFormat.addPixmap(QtGui.QPixmap(":/Formats/icons/EPUB.png"), QtGui.QIcon.Mode.Normal, QtGui.QIcon.State.Off)
 
         self.info = QtGui.QIcon()
-        self.info.addPixmap(QtGui.QPixmap(":/Status/icons/info.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
+        self.info.addPixmap(QtGui.QPixmap(":/Status/icons/info.png"), QtGui.QIcon.Mode.Normal, QtGui.QIcon.State.Off)
         self.warning = QtGui.QIcon()
-        self.warning.addPixmap(QtGui.QPixmap(":/Status/icons/warning.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
+        self.warning.addPixmap(QtGui.QPixmap(":/Status/icons/warning.png"), QtGui.QIcon.Mode.Normal, QtGui.QIcon.State.Off)
         self.error = QtGui.QIcon()
-        self.error.addPixmap(QtGui.QPixmap(":/Status/icons/error.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
+        self.error.addPixmap(QtGui.QPixmap(":/Status/icons/error.png"), QtGui.QIcon.Mode.Normal, QtGui.QIcon.State.Off)
 
         self.programIcon = QtGui.QIcon()
-        self.programIcon.addPixmap(QtGui.QPixmap(":/Icon/icons/comic2ebook.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
+        self.programIcon.addPixmap(QtGui.QPixmap(":/Icon/icons/comic2ebook.png"), QtGui.QIcon.Mode.Normal, QtGui.QIcon.State.Off)
 
 
 class VersionThread(QtCore.QThread):
@@ -227,28 +227,28 @@ class WorkerThread(QtCore.QThread):
         options.format = str(GUI.formatBox.currentText()).replace('/AZW3', '')
         if GUI.mangaBox.isChecked():
             options.righttoleft = True
-        if GUI.rotateBox.checkState() == 1:
+        if GUI.rotateBox.checkState().value == 1:
             options.splitter = 2
-        elif GUI.rotateBox.checkState() == 2:
+        elif GUI.rotateBox.checkState().value == 2:
             options.splitter = 1
-        if GUI.qualityBox.checkState() == 1:
+        if GUI.qualityBox.checkState().value == 1:
             options.autoscale = True
-        elif GUI.qualityBox.checkState() == 2:
+        elif GUI.qualityBox.checkState().value == 2:
             options.hq = True
         if GUI.webtoonBox.isChecked():
             options.webtoon = True
-        if GUI.upscaleBox.checkState() == 1:
+        if GUI.upscaleBox.checkState().value == 1:
             options.stretch = True
-        elif GUI.upscaleBox.checkState() == 2:
+        elif GUI.upscaleBox.checkState().value == 2:
             options.upscale = True
         if GUI.gammaBox.isChecked() and float(GUI.gammaValue) > 0.09:
             options.gamma = float(GUI.gammaValue)
-        options.cropping = GUI.croppingBox.checkState()
-        if GUI.croppingBox.checkState() >= 1:
+        options.cropping = GUI.croppingBox.checkState().value
+        if GUI.croppingBox.checkState().value >= 1:
             options.croppingp = float(GUI.croppingPowerValue)
         if GUI.borderBox.checkState() == 1:
             options.white_borders = True
-        elif GUI.borderBox.checkState() == 2:
+        elif GUI.borderBox.checkState().value == 2:
             options.black_borders = True
         if GUI.outputSplit.isChecked():
             options.batchsplit = 2
@@ -260,9 +260,9 @@ class WorkerThread(QtCore.QThread):
             options.noprocessing = True
         if GUI.deleteBox.isChecked():
             options.delete = True
-        if GUI.mozJpegBox.checkState() == 1:
+        if GUI.mozJpegBox.checkState().value == 1:
             options.forcepng = True
-        elif GUI.mozJpegBox.checkState() == 2:
+        elif GUI.mozJpegBox.checkState().value == 2:
             options.mozjpeg = True
         if GUI.currentMode > 2:
             options.customwidth = str(GUI.widthBox.value())
@@ -444,7 +444,7 @@ class SystemTrayIcon(QtWidgets.QSystemTrayIcon):
         MW.activateWindow()
 
     def addTrayMessage(self, message, icon):
-        icon = eval('QtWidgets.QSystemTrayIcon.' + icon)
+        icon = eval('QtWidgets.QSystemTrayIcon.MessageIcon.' + icon)
         if self.supportsMessages() and not MW.isActiveWindow():
             self.showMessage('Kindle Comic Converter', message, icon)
 
@@ -554,7 +554,7 @@ class KCCGUI(KCC_ui.Ui_mainWindow):
             self.conversionAlive = False
             self.worker.sync()
             icon = QtGui.QIcon()
-            icon.addPixmap(QtGui.QPixmap(":/Other/icons/convert.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
+            icon.addPixmap(QtGui.QPixmap(":/Other/icons/convert.png"), QtGui.QIcon.Mode.Normal, QtGui.QIcon.State.Off)
             GUI.convertButton.setIcon(icon)
             GUI.convertButton.setText('Convert')
             GUI.centralWidget.setAcceptDrops(True)
@@ -562,7 +562,7 @@ class KCCGUI(KCC_ui.Ui_mainWindow):
             self.conversionAlive = True
             self.worker.sync()
             icon = QtGui.QIcon()
-            icon.addPixmap(QtGui.QPixmap(":/Other/icons/clear.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
+            icon.addPixmap(QtGui.QPixmap(":/Other/icons/clear.png"), QtGui.QIcon.Mode.Normal, QtGui.QIcon.State.Off)
             GUI.convertButton.setIcon(icon)
             GUI.convertButton.setText('Abort')
             GUI.centralWidget.setAcceptDrops(False)
@@ -693,7 +693,7 @@ class KCCGUI(KCC_ui.Ui_mainWindow):
 
     def showDialog(self, message, kind):
         if kind == 'error':
-            QtWidgets.QMessageBox.critical(MW, 'KCC - Error', message, QtWidgets.QMessageBox.Ok)
+            QtWidgets.QMessageBox.critical(MW, 'KCC - Error', message, QtWidgets.QMessageBox.StandardButton.Ok)
         elif kind == 'question':
             GUI.versionCheck.setAnswer(QtWidgets.QMessageBox.question(MW, 'KCC - Question', message,
                                                                       QtWidgets.QMessageBox.Yes,
@@ -721,7 +721,7 @@ class KCCGUI(KCC_ui.Ui_mainWindow):
             self.conversionAlive = False
             self.worker.sync()
         else:
-            if QtWidgets.QApplication.keyboardModifiers() == QtCore.Qt.ShiftModifier:
+            if QtWidgets.QApplication.keyboardModifiers() == QtCore.Qt.KeyboardModifier.ShiftModifier:
                 dname = QtWidgets.QFileDialog.getExistingDirectory(MW, 'Select output directory', self.lastPath)
                 if dname != '':
                     if sys.platform.startswith('win'):
@@ -1024,7 +1024,7 @@ class KCCGUI(KCC_ui.Ui_mainWindow):
                                           'com/ciromattia/kcc/blob/master/README.md#issues--new-features--donations">DO'
                                           'NATE</a> - <a href="http://www.mobileread.com/forums/showthread.php?t=207461'
                                           '">FORUM</a></b>')
-        statusBarLabel.setAlignment(QtCore.Qt.AlignCenter)
+        statusBarLabel.setAlignment(QtCore.Qt.AlignmentFlag.AlignCenter)
         statusBarLabel.setOpenExternalLinks(True)
         GUI.statusBar.addPermanentWidget(statusBarLabel, 1)
 
@@ -1111,7 +1111,7 @@ class KCCGUI(KCC_ui.Ui_mainWindow):
             else:
                 try:
                     if eval('GUI.' + str(option)).isEnabled():
-                        eval('GUI.' + str(option)).setCheckState(self.options[option])
+                        eval('GUI.' + str(option)).setCheckState(QtCore.CheckState(self.options[option]))
                 except AttributeError:
                     pass
         self.worker.sync()
@@ -1185,7 +1185,7 @@ class KCCGUI_MetaEditor(KCC_ui_editor.Ui_editorDialog):
         self.ui = QtWidgets.QDialog()
         self.parser = None
         self.setupUi(self.ui)
-        self.ui.setWindowFlags(self.ui.windowFlags() & ~QtCore.Qt.WindowContextHelpButtonHint)
+        self.ui.setWindowFlags(self.ui.windowFlags() & ~QtCore.Qt.WindowType.WindowContextHelpButtonHint)
         self.okButton.clicked.connect(self.saveData)
         self.cancelButton.clicked.connect(self.ui.close)
         if sys.platform.startswith('linux'):
diff --git a/kindlecomicconverter/KCC_rc.py b/kindlecomicconverter/KCC_rc.py
index 4176bc9..b9ac41c 100644
--- a/kindlecomicconverter/KCC_rc.py
+++ b/kindlecomicconverter/KCC_rc.py
@@ -6,7 +6,7 @@
 #
 # WARNING! All changes made in this file will be lost!
 
-from PyQt5 import QtCore
+from PyQt6 import QtCore
 
 qt_resource_data = b"\
 \x00\x00\x0c\x65\
diff --git a/kindlecomicconverter/KCC_ui.py b/kindlecomicconverter/KCC_ui.py
index 0db83b0..46d2f18 100644
--- a/kindlecomicconverter/KCC_ui.py
+++ b/kindlecomicconverter/KCC_ui.py
@@ -8,7 +8,7 @@
 # run again.  Do not edit this file unless you know what you are doing.
 
 
-from PyQt5 import QtCore, QtGui, QtWidgets
+from PyQt6 import QtCore, QtGui, QtWidgets
 
 
 class Ui_mainWindow(object):
@@ -16,7 +16,7 @@ class Ui_mainWindow(object):
         mainWindow.setObjectName("mainWindow")
         mainWindow.resize(450, 400)
         icon = QtGui.QIcon()
-        icon.addPixmap(QtGui.QPixmap(":/Icon/icons/comic2ebook.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
+        icon.addPixmap(QtGui.QPixmap(":/Icon/icons/comic2ebook.png"), QtGui.QIcon.Mode.Normal, QtGui.QIcon.State.Off)
         mainWindow.setWindowIcon(icon)
         self.centralWidget = QtWidgets.QWidget(mainWindow)
         self.centralWidget.setObjectName("centralWidget")
@@ -89,7 +89,7 @@ class Ui_mainWindow(object):
         self.gammaSlider = QtWidgets.QSlider(self.gammaWidget)
         self.gammaSlider.setMaximum(250)
         self.gammaSlider.setSingleStep(5)
-        self.gammaSlider.setOrientation(QtCore.Qt.Horizontal)
+        self.gammaSlider.setOrientation(QtCore.Qt.Orientation.Horizontal)
         self.gammaSlider.setObjectName("gammaSlider")
         self.horizontalLayout_2.addWidget(self.gammaSlider)
         self.gridLayout.addWidget(self.gammaWidget, 6, 0, 1, 2)
@@ -105,12 +105,12 @@ class Ui_mainWindow(object):
         self.croppingPowerSlider = QtWidgets.QSlider(self.croppingWidget)
         self.croppingPowerSlider.setMaximum(200)
         self.croppingPowerSlider.setSingleStep(1)
-        self.croppingPowerSlider.setOrientation(QtCore.Qt.Horizontal)
+        self.croppingPowerSlider.setOrientation(QtCore.Qt.Orientation.Horizontal)
         self.croppingPowerSlider.setObjectName("croppingPowerSlider")
         self.horizontalLayout_3.addWidget(self.croppingPowerSlider)
         self.gridLayout.addWidget(self.croppingWidget, 8, 0, 1, 2)
         self.buttonWidget = QtWidgets.QWidget(self.centralWidget)
-        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Fixed)
+        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Policy.Preferred, QtWidgets.QSizePolicy.Policy.Fixed)
         sizePolicy.setHorizontalStretch(0)
         sizePolicy.setVerticalStretch(0)
         sizePolicy.setHeightForWidth(self.buttonWidget.sizePolicy().hasHeightForWidth())
@@ -122,14 +122,14 @@ class Ui_mainWindow(object):
         self.directoryButton = QtWidgets.QPushButton(self.buttonWidget)
         self.directoryButton.setMinimumSize(QtCore.QSize(0, 30))
         icon1 = QtGui.QIcon()
-        icon1.addPixmap(QtGui.QPixmap(":/Other/icons/folder_new.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
+        icon1.addPixmap(QtGui.QPixmap(":/Other/icons/folder_new.png"), QtGui.QIcon.Mode.Normal, QtGui.QIcon.State.Off)
         self.directoryButton.setIcon(icon1)
         self.directoryButton.setObjectName("directoryButton")
         self.gridLayout_4.addWidget(self.directoryButton, 0, 0, 1, 1)
         self.fileButton = QtWidgets.QPushButton(self.buttonWidget)
         self.fileButton.setMinimumSize(QtCore.QSize(0, 30))
         icon2 = QtGui.QIcon()
-        icon2.addPixmap(QtGui.QPixmap(":/Other/icons/document_new.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
+        icon2.addPixmap(QtGui.QPixmap(":/Other/icons/document_new.png"), QtGui.QIcon.Mode.Normal, QtGui.QIcon.State.Off)
         self.fileButton.setIcon(icon2)
         self.fileButton.setObjectName("fileButton")
         self.gridLayout_4.addWidget(self.fileButton, 0, 3, 1, 1)
@@ -147,14 +147,14 @@ class Ui_mainWindow(object):
         font.setBold(True)
         self.convertButton.setFont(font)
         icon3 = QtGui.QIcon()
-        icon3.addPixmap(QtGui.QPixmap(":/Other/icons/convert.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
+        icon3.addPixmap(QtGui.QPixmap(":/Other/icons/convert.png"), QtGui.QIcon.Mode.Normal, QtGui.QIcon.State.Off)
         self.convertButton.setIcon(icon3)
         self.convertButton.setObjectName("convertButton")
         self.gridLayout_4.addWidget(self.convertButton, 1, 2, 1, 1)
         self.clearButton = QtWidgets.QPushButton(self.buttonWidget)
         self.clearButton.setMinimumSize(QtCore.QSize(0, 30))
         icon4 = QtGui.QIcon()
-        icon4.addPixmap(QtGui.QPixmap(":/Other/icons/clear.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
+        icon4.addPixmap(QtGui.QPixmap(":/Other/icons/clear.png"), QtGui.QIcon.Mode.Normal, QtGui.QIcon.State.Off)
         self.clearButton.setIcon(icon4)
         self.clearButton.setObjectName("clearButton")
         self.gridLayout_4.addWidget(self.clearButton, 0, 2, 1, 1)
@@ -173,23 +173,23 @@ class Ui_mainWindow(object):
         self.editorButton = QtWidgets.QPushButton(self.toolWidget)
         self.editorButton.setMinimumSize(QtCore.QSize(0, 30))
         icon5 = QtGui.QIcon()
-        icon5.addPixmap(QtGui.QPixmap(":/Other/icons/editor.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
+        icon5.addPixmap(QtGui.QPixmap(":/Other/icons/editor.png"), QtGui.QIcon.Mode.Normal, QtGui.QIcon.State.Off)
         self.editorButton.setIcon(icon5)
         self.editorButton.setObjectName("editorButton")
         self.horizontalLayout.addWidget(self.editorButton)
         self.wikiButton = QtWidgets.QPushButton(self.toolWidget)
         self.wikiButton.setMinimumSize(QtCore.QSize(0, 30))
         icon6 = QtGui.QIcon()
-        icon6.addPixmap(QtGui.QPixmap(":/Other/icons/wiki.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
+        icon6.addPixmap(QtGui.QPixmap(":/Other/icons/wiki.png"), QtGui.QIcon.Mode.Normal, QtGui.QIcon.State.Off)
         self.wikiButton.setIcon(icon6)
         self.wikiButton.setObjectName("wikiButton")
         self.horizontalLayout.addWidget(self.wikiButton)
         self.gridLayout.addWidget(self.toolWidget, 0, 0, 1, 2)
         self.jobList = QtWidgets.QListWidget(self.centralWidget)
         self.jobList.setStyleSheet("QListWidget#jobList {background:#ffffff;background-image:url(:/Other/icons/list_background.png);background-position:center center;background-repeat:no-repeat;color:rgb(0,0,0);}")
-        self.jobList.setSelectionMode(QtWidgets.QAbstractItemView.NoSelection)
-        self.jobList.setVerticalScrollMode(QtWidgets.QAbstractItemView.ScrollPerPixel)
-        self.jobList.setHorizontalScrollMode(QtWidgets.QAbstractItemView.ScrollPerPixel)
+        self.jobList.setSelectionMode(QtWidgets.QAbstractItemView.SelectionMode.NoSelection)
+        self.jobList.setVerticalScrollMode(QtWidgets.QAbstractItemView.ScrollMode.ScrollPerPixel)
+        self.jobList.setHorizontalScrollMode(QtWidgets.QAbstractItemView.ScrollMode.ScrollPerPixel)
         self.jobList.setObjectName("jobList")
         self.gridLayout.addWidget(self.jobList, 2, 0, 1, 2)
         self.progressBar = QtWidgets.QProgressBar(self.centralWidget)
@@ -198,7 +198,7 @@ class Ui_mainWindow(object):
         font.setBold(True)
         self.progressBar.setFont(font)
         self.progressBar.setVisible(False)
-        self.progressBar.setAlignment(QtCore.Qt.AlignJustify|QtCore.Qt.AlignVCenter)
+        self.progressBar.setAlignment(QtCore.Qt.AlignmentFlag.AlignJustify|QtCore.Qt.AlignmentFlag.AlignVCenter)
         self.progressBar.setObjectName("progressBar")
         self.gridLayout.addWidget(self.progressBar, 1, 0, 1, 2)
         self.customWidget = QtWidgets.QWidget(self.centralWidget)
@@ -208,7 +208,7 @@ class Ui_mainWindow(object):
         self.gridLayout_3.setContentsMargins(0, 0, 0, 0)
         self.gridLayout_3.setObjectName("gridLayout_3")
         self.hLabel = QtWidgets.QLabel(self.customWidget)
-        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Preferred)
+        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Policy.Fixed, QtWidgets.QSizePolicy.Policy.Preferred)
         sizePolicy.setHorizontalStretch(0)
         sizePolicy.setVerticalStretch(0)
         sizePolicy.setHeightForWidth(self.hLabel.sizePolicy().hasHeightForWidth())
@@ -220,7 +220,7 @@ class Ui_mainWindow(object):
         self.widthBox.setObjectName("widthBox")
         self.gridLayout_3.addWidget(self.widthBox, 0, 1, 1, 1)
         self.wLabel = QtWidgets.QLabel(self.customWidget)
-        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Preferred)
+        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Policy.Fixed, QtWidgets.QSizePolicy.Policy.Preferred)
         sizePolicy.setHorizontalStretch(0)
         sizePolicy.setVerticalStretch(0)
         sizePolicy.setHeightForWidth(self.wLabel.sizePolicy().hasHeightForWidth())
diff --git a/kindlecomicconverter/KCC_ui_editor.py b/kindlecomicconverter/KCC_ui_editor.py
index 3822dba..ff5d324 100644
--- a/kindlecomicconverter/KCC_ui_editor.py
+++ b/kindlecomicconverter/KCC_ui_editor.py
@@ -8,7 +8,7 @@
 # run again.  Do not edit this file unless you know what you are doing.
 
 
-from PyQt5 import QtCore, QtGui, QtWidgets
+from PyQt6 import QtCore, QtGui, QtWidgets
 
 
 class Ui_editorDialog(object):
@@ -17,7 +17,7 @@ class Ui_editorDialog(object):
         editorDialog.resize(400, 260)
         editorDialog.setMinimumSize(QtCore.QSize(400, 260))
         icon = QtGui.QIcon()
-        icon.addPixmap(QtGui.QPixmap(":/Icon/icons/comic2ebook.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
+        icon.addPixmap(QtGui.QPixmap(":/Icon/icons/comic2ebook.png"), QtGui.QIcon.Mode.Normal, QtGui.QIcon.State.Off)
         editorDialog.setWindowIcon(icon)
         self.verticalLayout = QtWidgets.QVBoxLayout(editorDialog)
         self.verticalLayout.setContentsMargins(-1, -1, -1, 5)
@@ -76,7 +76,7 @@ class Ui_editorDialog(object):
         self.horizontalLayout.setContentsMargins(0, 0, 0, 0)
         self.horizontalLayout.setObjectName("horizontalLayout")
         self.statusLabel = QtWidgets.QLabel(self.optionWidget)
-        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.MinimumExpanding, QtWidgets.QSizePolicy.MinimumExpanding)
+        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Policy.MinimumExpanding, QtWidgets.QSizePolicy.Policy.MinimumExpanding)
         sizePolicy.setHorizontalStretch(0)
         sizePolicy.setVerticalStretch(0)
         sizePolicy.setHeightForWidth(self.statusLabel.sizePolicy().hasHeightForWidth())
@@ -87,14 +87,14 @@ class Ui_editorDialog(object):
         self.okButton = QtWidgets.QPushButton(self.optionWidget)
         self.okButton.setMinimumSize(QtCore.QSize(0, 30))
         icon1 = QtGui.QIcon()
-        icon1.addPixmap(QtGui.QPixmap(":/Other/icons/convert.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
+        icon1.addPixmap(QtGui.QPixmap(":/Other/icons/convert.png"), QtGui.QIcon.Mode.Normal, QtGui.QIcon.State.Off)
         self.okButton.setIcon(icon1)
         self.okButton.setObjectName("okButton")
         self.horizontalLayout.addWidget(self.okButton)
         self.cancelButton = QtWidgets.QPushButton(self.optionWidget)
         self.cancelButton.setMinimumSize(QtCore.QSize(0, 30))
         icon2 = QtGui.QIcon()
-        icon2.addPixmap(QtGui.QPixmap(":/Other/icons/clear.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
+        icon2.addPixmap(QtGui.QPixmap(":/Other/icons/clear.png"), QtGui.QIcon.Mode.Normal, QtGui.QIcon.State.Off)
         self.cancelButton.setIcon(icon2)
         self.cancelButton.setObjectName("cancelButton")
         self.horizontalLayout.addWidget(self.cancelButton)
diff --git a/kindlecomicconverter/comic2ebook.py b/kindlecomicconverter/comic2ebook.py
index 398bf21..b26c839 100755
--- a/kindlecomicconverter/comic2ebook.py
+++ b/kindlecomicconverter/comic2ebook.py
@@ -36,10 +36,6 @@ from PIL import Image
 from subprocess import STDOUT, PIPE
 from psutil import Popen, virtual_memory, disk_usage
 from html import escape as hescape
-try:
-    from PyQt5 import QtCore
-except ImportError:
-    QtCore = None
 from .shared import md5Checksum, getImageFileName, walkSort, walkLevel, sanitizeTrace
 from . import comic2panel
 from . import image
diff --git a/kindlecomicconverter/comic2panel.py b/kindlecomicconverter/comic2panel.py
index 48244ad..3de1ffd 100644
--- a/kindlecomicconverter/comic2panel.py
+++ b/kindlecomicconverter/comic2panel.py
@@ -25,10 +25,6 @@ from shutil import rmtree, copytree, move
 from multiprocessing import Pool
 from PIL import Image, ImageChops, ImageOps, ImageDraw
 from .shared import getImageFileName, walkLevel, walkSort, sanitizeTrace
-try:
-    from PyQt5 import QtCore
-except ImportError:
-    QtCore = None
 
 
 def mergeDirectoryTick(output):
diff --git a/kindlecomicconverter/image.py b/kindlecomicconverter/image.py
index 9df8049..9e7b85b 100755
--- a/kindlecomicconverter/image.py
+++ b/kindlecomicconverter/image.py
@@ -20,7 +20,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 import io
 import os
-import mozjpeg_lossless_optimization
+#import mozjpeg_lossless_optimization
 from PIL import Image, ImageOps, ImageStat, ImageChops, ImageFilter
 from .shared import md5Checksum
 
diff --git a/kindlecomicconverter/shared.py b/kindlecomicconverter/shared.py
index 5c1136b..7d6f63d 100644
--- a/kindlecomicconverter/shared.py
+++ b/kindlecomicconverter/shared.py
@@ -100,7 +100,7 @@ def dependencyCheck(level):
     missing = []
     if level > 2:
         try:
-            from PyQt5.QtCore import qVersion as qtVersion
+            from PyQt6.QtCore import qVersion as qtVersion
             if StrictVersion('5.6.0') > StrictVersion(qtVersion()):
                 missing.append('PyQt 5.6.0+')
         except ImportError:
diff --git a/kindlecomicconverter/startup.py b/kindlecomicconverter/startup.py
index c92579d..50c30b2 100644
--- a/kindlecomicconverter/startup.py
+++ b/kindlecomicconverter/startup.py
@@ -39,7 +39,7 @@ def start():
         KCCUI = KCC_gui.KCCGUI(KCCAplication, KCCWindow)
         for i in range(1, len(sys.argv)):
             KCCUI.handleMessage(sys.argv[i])
-        sys.exit(KCCAplication.exec_())
+        sys.exit(KCCAplication.exec())
 
 
 def startC2E():
diff --git a/requirements.txt b/requirements.txt
index 156b842..763b567 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-PyQt5>=5.6.0
+PyQt6
 Pillow>=5.2.0
 psutil>=5.0.0
 python-slugify>=1.2.1