diff --git a/cozy/application.py b/cozy/application.py
index cd85e7ff..45768e30 100644
--- a/cozy/application.py
+++ b/cozy/application.py
@@ -2,7 +2,6 @@
 import platform
 import sys
 import threading
-from pathlib import Path
 from traceback import format_exception
 
 import distro
@@ -27,7 +26,7 @@ class Application(Adw.Application):
     def __init__(self, pkgdatadir: str):
         self.pkgdatadir = pkgdatadir
 
-        super().__init__(application_id='com.github.geigi.cozy')
+        super().__init__(application_id="com.github.geigi.cozy")
         self.init_custom_widgets()
 
         GLib.setenv("PULSE_PROP_media.role", "music", True)
diff --git a/cozy/ui/main_view.py b/cozy/ui/main_view.py
index 87bb92eb..076664b9 100644
--- a/cozy/ui/main_view.py
+++ b/cozy/ui/main_view.py
@@ -19,11 +19,11 @@
 from cozy.ui.book_detail_view import BookDetailView
 from cozy.ui.library_view import LibraryView
 from cozy.ui.preferences_window import PreferencesWindow
+from cozy.ui.widgets.storages import ask_storage_location
 from cozy.ui.widgets.welcome_dialog import WelcomeDialog
 from cozy.view_model.playback_control_view_model import PlaybackControlViewModel
 from cozy.view_model.playback_speed_view_model import PlaybackSpeedViewModel
 from cozy.view_model.storages_view_model import StoragesViewModel
-from cozy.ui.widgets.storages import ask_storage_location
 
 log = logging.getLogger("ui")
 
diff --git a/cozy/ui/widgets/book_card.py b/cozy/ui/widgets/book_card.py
index 5d56f343..d8a6ad58 100644
--- a/cozy/ui/widgets/book_card.py
+++ b/cozy/ui/widgets/book_card.py
@@ -49,7 +49,7 @@ def do_snapshot(self, snapshot: Gtk.Snapshot) -> None:
         context.stroke()
 
 
-@Gtk.Template.from_resource('/com/github/geigi/cozy/ui/book_card.ui')
+@Gtk.Template.from_resource("/com/github/geigi/cozy/ui/book_card.ui")
 class BookCard(Gtk.FlowBoxChild):
     __gtype_name__ = "BookCard"
 
diff --git a/cozy/ui/widgets/error_reporting.py b/cozy/ui/widgets/error_reporting.py
index 880c75ec..1be4a51e 100644
--- a/cozy/ui/widgets/error_reporting.py
+++ b/cozy/ui/widgets/error_reporting.py
@@ -9,28 +9,29 @@
     _("Disabled"),
     _("Basic error reporting"),
     _("Detailed error reporting"),
-    _("Detailed, with media types")
+    _("Detailed, with media types"),
 ]
 
 LEVEL_DESCRIPTION = [
     _("No error or crash reporting."),
-    _("The following information will be sent in case of an error or crash:")
+    _("The following information will be sent in case of an error or crash:"),
 ]
 
 LEVEL_DETAILS = [
     [],
-    [_("Which type of error occurred"),
+    [
+        _("Which type of error occurred"),
         _("Line of code where an error occurred"),
-        _("Cozy's version"), ],
-    [_("Linux distribution"),
-        _("Desktop environment")],
-    [_("Media type of files that Cozy couldn't import")]
+        _("Cozy's version"),
+    ],
+    [_("Linux distribution"), _("Desktop environment")],
+    [_("Media type of files that Cozy couldn't import")],
 ]
 
 
-@Gtk.Template.from_resource('/com/github/geigi/cozy/ui/error_reporting.ui')
+@Gtk.Template.from_resource("/com/github/geigi/cozy/ui/error_reporting.ui")
 class ErrorReporting(Gtk.Box):
-    __gtype_name__ = 'ErrorReporting'
+    __gtype_name__ = "ErrorReporting"
 
     description: Adw.ActionRow = Gtk.Template.Child()
     detail_combo: Adw.ComboRow = Gtk.Template.Child()
@@ -61,10 +62,9 @@ def _level_selected(self, obj, param) -> None:
 
     def _update_description(self, level: int):
         self.description.set_title(LEVEL_DESCRIPTION[min(level, 1)])
-        details = "\n".join(["• " + i for i in chain(*LEVEL_DETAILS[:level+1])])
+        details = "\n".join(["• " + i for i in chain(*LEVEL_DETAILS[: level + 1])])
         self.description.set_subtitle(details)
 
     def _on_app_setting_changed(self, event, _):
         if event == "report-level":
             self._load_report_level()
-
diff --git a/cozy/ui/widgets/welcome_dialog.py b/cozy/ui/widgets/welcome_dialog.py
index 155bf5f8..8a273c08 100644
--- a/cozy/ui/widgets/welcome_dialog.py
+++ b/cozy/ui/widgets/welcome_dialog.py
@@ -1,17 +1,15 @@
+import os.path
 from pathlib import Path
+
 import inject
-import os.path
 from gi.repository import Adw, Gtk
 
-from cozy.view_model.playback_speed_view_model import PlaybackSpeedViewModel
-from cozy.ui.widgets.error_reporting import ErrorReporting
 from cozy.settings import ApplicationSettings
-from cozy.view_model.storages_view_model import StoragesViewModel
-
 from cozy.ui.widgets.storages import ask_storage_location
+from cozy.view_model.storages_view_model import StoragesViewModel
 
 
-@Gtk.Template.from_resource('/com/github/geigi/cozy/ui/welcome_dialog.ui')
+@Gtk.Template.from_resource("/com/github/geigi/cozy/ui/welcome_dialog.ui")
 class WelcomeDialog(Adw.Dialog):
     __gtype_name__ = "WelcomeDialog"