diff --git a/dangerzone/container.py b/dangerzone/container.py
index aac9efa..5482cdf 100644
--- a/dangerzone/container.py
+++ b/dangerzone/container.py
@@ -32,7 +32,9 @@ def exec_container(args, stdout_callback: Callable[[str], None]) -> int:
         return p.returncode
 
 
-def convert(input_filename, output_filename, ocr_lang, stdout_callback: Callable[[str], None]):
+def convert(
+    input_filename, output_filename, ocr_lang, stdout_callback: Callable[[str], None]
+):
     success = False
 
     if ocr_lang:
@@ -117,6 +119,7 @@ def convert(input_filename, output_filename, ocr_lang, stdout_callback: Callable
 
     return success
 
+
 # From global_common:
 
 # def validate_convert_to_pixel_output(self, common, output):
diff --git a/dangerzone/gui/__init__.py b/dangerzone/gui/__init__.py
index f491a7e..608b064 100644
--- a/dangerzone/gui/__init__.py
+++ b/dangerzone/gui/__init__.py
@@ -47,7 +47,7 @@ def gui_main(filename):
 
     # Initialize colorama
     colorama.init(autoreset=True)
-    
+
     # Common objects
     gui_common = GuiCommon(app)
 
diff --git a/dangerzone/gui/gui_common.py b/dangerzone/gui/gui_common.py
index baa07d0..7cbff8b 100644
--- a/dangerzone/gui/gui_common.py
+++ b/dangerzone/gui/gui_common.py
@@ -45,9 +45,7 @@ class GuiCommon(object):
 
         elif platform.system() == "Linux":
             # Get the PDF reader command
-            args = shlex.split(
-                self.pdf_viewers[self.settings.get("open_app")]
-            )
+            args = shlex.split(self.pdf_viewers[self.settings.get("open_app")])
             # %f, %F, %u, and %U are filenames or URLS -- so replace with the file to open
             for i in range(len(args)):
                 if (
diff --git a/dangerzone/gui/main_window.py b/dangerzone/gui/main_window.py
index 0715086..06ac7c6 100644
--- a/dangerzone/gui/main_window.py
+++ b/dangerzone/gui/main_window.py
@@ -33,9 +33,7 @@ class MainWindow(QtWidgets.QMainWindow):
         # Header
         logo = QtWidgets.QLabel()
         logo.setPixmap(
-            QtGui.QPixmap.fromImage(
-                QtGui.QImage(dzutil.get_resource_path("icon.png"))
-            )
+            QtGui.QPixmap.fromImage(QtGui.QImage(dzutil.get_resource_path("icon.png")))
         )
         header_label = QtWidgets.QLabel("dangerzone")
         header_label.setFont(self.gui_common.fixed_font)
@@ -52,9 +50,7 @@ class MainWindow(QtWidgets.QMainWindow):
         self.waiting_widget.finished.connect(self.waiting_finished)
 
         # Content widget, contains all the window content except waiting widget
-        self.content_widget = ContentWidget(
-            self.gui_common, self.common
-        )
+        self.content_widget = ContentWidget(self.gui_common, self.common)
         self.content_widget.close_window.connect(self.close)
 
         # Only use the waiting widget if container runtime isn't available
@@ -211,9 +207,7 @@ class ContentWidget(QtWidgets.QWidget):
         self.doc_selection_widget.document_selected.connect(self.document_selected)
 
         # Settings
-        self.settings_widget = SettingsWidget(
-            self.gui_common, self.common
-        )
+        self.settings_widget = SettingsWidget(self.gui_common, self.common)
         self.doc_selection_widget.document_selected.connect(
             self.settings_widget.document_selected
         )
@@ -222,9 +216,7 @@ class ContentWidget(QtWidgets.QWidget):
         self.settings_widget.hide()
 
         # Convert
-        self.convert_widget = ConvertWidget(
-            self.gui_common, self.common
-        )
+        self.convert_widget = ConvertWidget(self.gui_common, self.common)
         self.convert_widget.close_window.connect(self._close_window)
         self.doc_selection_widget.document_selected.connect(
             self.convert_widget.document_selected
@@ -399,9 +391,7 @@ class SettingsWidget(QtWidgets.QWidget):
         else:
             self.ocr_checkbox.setCheckState(QtCore.Qt.Unchecked)
 
-        index = self.ocr_combobox.findText(
-            self.gui_common.settings.get("ocr_language")
-        )
+        index = self.ocr_combobox.findText(self.gui_common.settings.get("ocr_language"))
         if index != -1:
             self.ocr_combobox.setCurrentIndex(index)
 
@@ -551,9 +541,7 @@ class ConvertWidget(QtWidgets.QWidget):
         # Label
         self.error_image = QtWidgets.QLabel()
         self.error_image.setPixmap(
-            QtGui.QPixmap.fromImage(
-                QtGui.QImage(dzutil.get_resource_path("error.png"))
-            )
+            QtGui.QPixmap.fromImage(QtGui.QImage(dzutil.get_resource_path("error.png")))
         )
         self.error_image.hide()
 
diff --git a/dangerzone/gui/systray.py b/dangerzone/gui/systray.py
index ba7915e..52d3c1d 100644
--- a/dangerzone/gui/systray.py
+++ b/dangerzone/gui/systray.py
@@ -6,9 +6,7 @@ import dangerzone.util as dzutil
 
 
 class SysTray(QtWidgets.QSystemTrayIcon):
-    def __init__(
-        self, gui_common: GuiCommon, app: Application
-    ):
+    def __init__(self, gui_common: GuiCommon, app: Application):
         super(SysTray, self).__init__()
         self.gui_common = gui_common
         self.app = app
diff --git a/dangerzone/util.py b/dangerzone/util.py
index 24586db..8cb7f67 100644
--- a/dangerzone/util.py
+++ b/dangerzone/util.py
@@ -40,9 +40,13 @@ def get_resource_path(filename: str | os.PathLike[str]) -> str:
         # Look for ./share relative to python file
         prefix = _dev_root_path().joinpath("share")  # e.g., /home/user/dangerzone/share
     elif SYSTEM == "Darwin":
-        bin_path = pathlib.Path(sys.executable)  # /path/to/Dangerzone.app/Contents/MacOS/dangerzone[-cli]
+        bin_path = pathlib.Path(
+            sys.executable
+        )  # /path/to/Dangerzone.app/Contents/MacOS/dangerzone[-cli]
         app_path = bin_path.parent.parent  # /path/to/Dangerzone.app/Contents
-        prefix = app_path.joinpath("Resources", "share")  # /path/to/Dangerzone.app/Contents/Resources/share
+        prefix = app_path.joinpath(
+            "Resources", "share"
+        )  # /path/to/Dangerzone.app/Contents/Resources/share
     elif SYSTEM == "Linux":
         prefix = pathlib.Path(sys.prefix).joinpath("share", "dangerzone")
     elif SYSTEM == "Windows":
@@ -243,7 +247,7 @@ OCR_LANGUAGES = {
     "Vietnamese": "vie",
     "Welsh": "cym",
     "Yiddish": "yid",
-    "Yoruba": "yor"
+    "Yoruba": "yor",
 }