diff --git a/.gitignore b/.gitignore
index 33eb4d4..1e49dbb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,3 +12,4 @@ KindleComicConverter*.egg-info/
 /kindlegen*
 /kcc.bat
 mozjpeg_lossless_optimization-*.whl
+.DS_Store
diff --git a/README.md b/README.md
index 29371ea..f2f0dd3 100644
--- a/README.md
+++ b/README.md
@@ -39,18 +39,14 @@ You can find the latest binary at the following link:
 - flatpak : https://flathub.org/apps/details/io.github.ciromattia.kcc
 - Docker: https://github.com/ciromattia/kcc/pkgs/container/kcc
 
-~~- **[Windows](http://kcc.iosphe.re/Windows/) (64-bit only)**~~  
-~~- **[macOS](http://kcc.iosphe.re/OSX/) (10.14+)**~~  
-~~- **Linux:** Currently unavailable.~~
-
 more information on [installation](https://github.com/ciromattia/kcc/wiki/Installation)
 
 ### DEPENDENCIES
 Following software is required to run Linux version of **KCC** and/or bare sources:
 - Python 3.3+
-- [PyQt5](https://pypi.python.org/pypi/PyQt5) 5.6.0+ (only needed for GUI)
+- [PySide6](https://pypi.org/project/PySide6/) 6.5.1+ (only needed for GUI)
 - [Pillow](https://pypi.python.org/pypi/Pillow/) 4.0.0+ (5.2.0+ needed for WebP support)
-- [psutil](https://pypi.python.org/pypi/psutil) 5.0.0+
+- [psutil](https://pypi.python.org/pypi/psutil) 5.9.5+
 - [python-slugify](https://pypi.python.org/pypi/python-slugify) 1.2.1+, <8.0.0
 - [raven](https://pypi.python.org/pypi/raven) 6.0.0+ (only needed for GUI)
 
diff --git a/kindlecomicconverter/KCC_gui.py b/kindlecomicconverter/KCC_gui.py
index 1b325b1..e1d0f13 100644
--- a/kindlecomicconverter/KCC_gui.py
+++ b/kindlecomicconverter/KCC_gui.py
@@ -771,23 +771,23 @@ class KCCGUI(KCC_ui.Ui_mainWindow):
         self.settings.setValue('currentFormat', GUI.formatBox.currentIndex())
         self.settings.setValue('startNumber', self.startNumber + 1)
         self.settings.setValue('windowSize', str(MW.size().width()) + 'x' + str(MW.size().height()))
-        self.settings.setValue('options', {'mangaBox': GUI.mangaBox.checkState(),
-                                           'rotateBox': GUI.rotateBox.checkState(),
-                                           'qualityBox': GUI.qualityBox.checkState(),
-                                           'gammaBox': GUI.gammaBox.checkState(),
-                                           'croppingBox': GUI.croppingBox.checkState(),
+        self.settings.setValue('options', {'mangaBox': GUI.mangaBox.checkState().value,
+                                           'rotateBox': GUI.rotateBox.checkState().value,
+                                           'qualityBox': GUI.qualityBox.checkState().value,
+                                           'gammaBox': GUI.gammaBox.checkState().value,
+                                           'croppingBox': GUI.croppingBox.checkState().value,
                                            'croppingPowerSlider': float(self.croppingPowerValue) * 100,
-                                           'upscaleBox': GUI.upscaleBox.checkState(),
-                                           'borderBox': GUI.borderBox.checkState(),
-                                           'webtoonBox': GUI.webtoonBox.checkState(),
-                                           'outputSplit': GUI.outputSplit.checkState(),
-                                           'colorBox': GUI.colorBox.checkState(),
-                                           'disableProcessingBox': GUI.disableProcessingBox.checkState(),
-                                           'mozJpegBox': GUI.mozJpegBox.checkState(),
+                                           'upscaleBox': GUI.upscaleBox.checkState().value,
+                                           'borderBox': GUI.borderBox.checkState().value,
+                                           'webtoonBox': GUI.webtoonBox.checkState().value,
+                                           'outputSplit': GUI.outputSplit.checkState().value,
+                                           'colorBox': GUI.colorBox.checkState().value,
+                                           'disableProcessingBox': GUI.disableProcessingBox.checkState().value,
+                                           'mozJpegBox': GUI.mozJpegBox.checkState().value,
                                            'widthBox': GUI.widthBox.value(),
                                            'heightBox': GUI.heightBox.value(),
-                                           'deleteBox': GUI.deleteBox.checkState(),
-                                           'maximizeStrips': GUI.maximizeStrips.checkState(),
+                                           'deleteBox': GUI.deleteBox.checkState().value,
+                                           'maximizeStrips': GUI.maximizeStrips.checkState().value,
                                            'gammaSlider': float(self.gammaValue) * 100})
         self.settings.sync()
         self.tray.hide()
@@ -874,7 +874,7 @@ class KCCGUI(KCC_ui.Ui_mainWindow):
         self.setupUi(MW)
         self.editor = KCCGUI_MetaEditor()
         self.icons = Icons()
-        self.settings = QtCore.QSettings('KindleComicConverter', 'KindleComicConverter')
+        self.settings = QtCore.QSettings('ciromattia', 'kcc')
         self.settingsVersion = self.settings.value('settingsVersion', '', type=str)
         self.lastPath = self.settings.value('lastPath', '', type=str)
         self.lastDevice = self.settings.value('lastDevice', 0, type=int)
@@ -1116,7 +1116,7 @@ class KCCGUI(KCC_ui.Ui_mainWindow):
             else:
                 try:
                     if eval('GUI.' + str(option)).isEnabled():
-                        eval('GUI.' + str(option)).setCheckState(QtCore.CheckState(self.options[option]))
+                        eval('GUI.' + str(option)).setCheckState(Qt.CheckState(self.options[option]))
                 except AttributeError:
                     pass
         self.worker.sync()
diff --git a/kindlecomicconverter/comic2ebook.py b/kindlecomicconverter/comic2ebook.py
index be0b8bc..d8d6d97 100755
--- a/kindlecomicconverter/comic2ebook.py
+++ b/kindlecomicconverter/comic2ebook.py
@@ -627,7 +627,7 @@ def getWorkFolder(afile):
                 path = cbx.extract(workdir)
             except OSError as e:
                 rmtree(workdir, True)
-                raise UserWarning(e.strerror)
+                raise UserWarning(e)
     else:
         raise UserWarning("Failed to open source file/directory.")
     sanitizePermissions(path)
diff --git a/kindlecomicconverter/metadata.py b/kindlecomicconverter/metadata.py
index 9d60616..51ade3b 100644
--- a/kindlecomicconverter/metadata.py
+++ b/kindlecomicconverter/metadata.py
@@ -46,7 +46,7 @@ class MetadataParser:
                 self.rawdata = cbx.extractMetadata()
                 self.format = cbx.type
             except OSError as e:
-                raise UserWarning(e.strerror)
+                raise UserWarning(e)
         if self.rawdata:
             self.parseXML()
 
@@ -121,5 +121,5 @@ class MetadataParser:
                 cbx = comicarchive.ComicArchive(self.source)
                 cbx.addFile(tmpXML)
             except OSError as e:
-                raise UserWarning(e.strerror)
+                raise UserWarning(e)
             rmtree(workdir)
diff --git a/requirements.txt b/requirements.txt
index add0904..ed565a6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-PySide6
+PySide6>=6.5.1
 Pillow>=5.2.0
 psutil>=5.9.5
 python-slugify>=1.2.1