diff --git a/.pylintrc b/.pylintrc
index 701e3e4..ba5a914 100644
--- a/.pylintrc
+++ b/.pylintrc
@@ -65,11 +65,7 @@ disable=print-statement,
         unpacking-in-except,
         old-raise-syntax,
         backtick,
-        long-suffix,
-        old-ne-operator,
-        old-octal-literal,
         import-star-module-level,
-        non-ascii-bytes-literal,
         raw-checker-failed,
         bad-inline-option,
         locally-disabled,
@@ -117,7 +113,6 @@ disable=print-statement,
         range-builtin-not-iterating,
         filter-builtin-not-iterating,
         using-cmp-argument,
-        eq-without-hash,
         div-method,
         idiv-method,
         rdiv-method,
@@ -138,7 +133,15 @@ disable=print-statement,
         xreadlines-attribute,
         deprecated-sys-function,
         exception-escape,
-        comprehension-escape
+        comprehension-escape,
+        import-error,
+        no-name-in-module,
+        attribute-defined-outside-init,
+        missing-class-docstring,
+        missing-function-docstring,
+        unnecessary-lambda,
+        broad-except,
+        bare-except,
 
 # Enable the message, report, category or checker with the given id(s). You can
 # either give multiple identifier separated by comma (,) or put this option
@@ -422,7 +425,9 @@ good-names=i,
            k,
            ex,
            Run,
-           _
+           _,
+           db,
+           f
 
 # Good variable names regexes, separated by a comma. If names match any regex,
 # they will always be accepted
diff --git a/action.py b/action.py
index 211e921..9540330 100644
--- a/action.py
+++ b/action.py
@@ -1,5 +1,7 @@
 #!/usr/bin/env python3
 
+"""KOReader Sync Plugin for Calibre."""
+
 from datetime import datetime
 from functools import partial
 import io
@@ -7,32 +9,33 @@
 import os
 import re
 import sys
-from calibre.utils.iso8601 import utc_tz, local_tz
 
-from PyQt5.Qt import QUrl  # pylint: disable=no-name-in-module
-from calibre_plugins.koreader.slpp import slpp as lua  # pylint: disable=import-error
+from PyQt5.Qt import QUrl
+from calibre_plugins.koreader.slpp import slpp as lua
 from calibre_plugins.koreader.config import (
     SUPPORTED_DEVICES,
     UNSUPPORTED_DEVICES,
     COLUMNS,
-    CONFIG,  # pylint: disable=import-error
+    CONFIG,
 )
 from calibre_plugins.koreader import (
     DEBUG,
     DRY_RUN,
     PYDEVD,
-    KoreaderSync,  # pylint: disable=import-error
+    KoreaderSync,
 )
-from calibre.gui2.dialogs.message_box import MessageBox  # pylint: disable=no-name-in-module, disable=import-error
-from calibre.gui2.actions import InterfaceAction  # pylint: disable=no-name-in-module, disable=import-error
+
+from calibre.utils.iso8601 import utc_tz, local_tz
+from calibre.gui2.dialogs.message_box import MessageBox
+from calibre.gui2.actions import InterfaceAction
 from calibre.gui2 import (
     error_dialog,
     warning_dialog,
     info_dialog,
-    open_url,  # pylint: disable=no-name-in-module, disable=import-error
+    open_url,
 )
-from calibre.devices.usbms.driver import debug_print as root_debug_print  # pylint: disable=no-name-in-module, disable=import-error
-from calibre.constants import numeric_version  # pylint: disable=no-name-in-module, disable=import-error
+from calibre.devices.usbms.driver import debug_print as root_debug_print
+from calibre.constants import numeric_version
 
 __license__ = 'GNU GPLv3'
 __copyright__ = '2021, harmtemolder <mail at harmtemolder.com>'
@@ -49,7 +52,7 @@
             # '/Applications/PyCharm.app/Contents/debug-eggs/pydevd-pycharm.egg'  # macOS
             '/opt/pycharm-professional/debug-eggs/pydevd-pycharm.egg'  # Manjaro Linux
         )
-        import pydevd_pycharm  # pylint: disable=import-error
+        import pydevd_pycharm
 
         pydevd_pycharm.settrace(
             'localhost', stdoutToServer=True, stderrToServer=True,
@@ -79,12 +82,12 @@ def genesis(self):
         debug_print('start')
 
         base = self.interface_action_base_plugin
-        self.version = '{} (v{}.{}.{})'.format(base.name, *base.version)
+        self.version = f'{base.name} (v{".".join(map(str, base.version))})'
 
         # Overwrite icon with actual KOReader logo
-        icon = get_icons(
+        icon = get_icons( # pylint: disable=undefined-variable
             'images/icon.png'
-        )  # pylint: disable=undefined-variable
+        )
         self.qaction.setIcon(icon)
 
         # Left-click action
@@ -148,16 +151,16 @@ def show_readme(self):
     def show_about(self):
         debug_print = partial(module_debug_print, 'KoreaderAction:show_about:')
         debug_print('start')
-        text = get_resources('about.txt').decode(
+        text = get_resources('about.txt').decode( # pylint: disable=undefined-variable
             'utf-8'
-        )  # pylint: disable=undefined-variable
-        icon = get_icons(
+        )
+        icon = get_icons( # pylint: disable=undefined-variable
             'images/icon.png'
-        )  # pylint: disable=undefined-variable
+        )
 
         about_dialog = MessageBox(
             MessageBox.INFO,
-            'About {}'.format(self.version),
+            f'About {self.version}',
             text,
             det_msg='',
             q_icon=icon,
@@ -173,7 +176,6 @@ def apply_settings(self):
             'KoreaderAction:apply_settings:'
         )
         debug_print('start')
-        pass
 
     def get_connected_device(self):
         """Tries to get the connected device, if any
@@ -244,15 +246,13 @@ def get_paths(self, device):
 
         paths = {
             book.uuid: re.sub(
-                '\.(\w+)$', '.sdr/metadata.\\1.lua', book.path
+                r'\.(\w+)$', r'.sdr/metadata.\1.lua', book.path
             )
             for book in device.books()
         }
 
         debug_print(
-            'generated {} path(s) to sidecar Lua files:\n\t'.format(
-                len(paths)
-            ),
+            f'generated {len(paths)} path(s) to sidecar Lua files:\n\t',
             '\n\t'.join(paths.values())
         )
 
@@ -286,7 +286,7 @@ def get_sidecar(self, device, path):
                 debug_print('could not decode ', contents)
                 return None
 
-            debug_print('parsing {}'.format(path))
+            debug_print(f'parsing {path}')
             parsed_contents = self.parse_sidecar_lua(decoded_contents)
             parsed_contents['calculated']['date_sidecar_modified'] = datetime.fromtimestamp(
                 os.path.getmtime(path)).replace(tzinfo=local_tz
@@ -350,7 +350,7 @@ def update_metadata(self, uuid, keys_values_to_update):
             book_id = None
 
         if not book_id:
-            debug_print('could not find {} in calibre’s library'.format(uuid))
+            debug_print(f'could not find {uuid} in calibre’s library')
             return False, {'result': 'could not find uuid in calibre’s library'}
 
         # Get the current metadata for the book from the library
@@ -414,10 +414,8 @@ def check_device(self, device):
             error_dialog(
                 self.gui,
                 'Device not supported',
-                'Devices of the type {} are not supported by this plugin. I '
-                'have tried to get it working, but couldn’t. Sorry.'.format(
-                    device_class
-                ),
+                f'Devices of the type {device_class} are not supported by this plugin. I '
+                f'have tried to get it working, but couldn’t. Sorry.',
                 det_msg='',
                 show=True,
                 show_copy_button=False
@@ -433,11 +431,10 @@ def check_device(self, device):
             warning_dialog(
                 self.gui,
                 'Device not yet supported',
-                'Devices of the type {} are not yet supported by this plugin. '
-                'Please check if there already is a feature request for this '
-                '<a href="https://todo.sr.ht/~harmtemolder/koreader-calibre'
-                '-plugin">here</a>. If not, feel free to create '
-                'one. I\'ll try to sync anyway.'.format(device_class),
+                f'Devices of the type {device_class} are not yet supported by this plugin. '
+                f'Please check if there already is a feature request for this '
+                f'<a href="https://github.com/harmtemolder/koreader-calibre-plugin/issues">'
+                f'here</a>. If not, feel free to create one. I\'ll try to sync anyway.',
                 det_msg='',
                 show=True,
                 show_copy_button=False
@@ -465,7 +462,7 @@ def push_metadata_to_koreader_sidecar(self, book_uuid, path):
             book_id = None
 
         if not book_id:
-            debug_print('could not find {} in calibre’s library'.format(book_uuid))
+            debug_print(f'could not find {book_uuid} in calibre’s library')
             return "failure", {
                 'result': f"Could not find uuid {book_uuid} in Calibre's library."
             }
@@ -491,10 +488,10 @@ def push_metadata_to_koreader_sidecar(self, book_uuid, path):
             # dir exists, so we're fine
             pass
 
-        with open(path, "w") as f:
+        with open(path, "w", encoding="utf-8") as f:
             debug_print(f"Writing to {path}")
             f.write(sidecar_lua_formatted)
- 
+
         return "success", {
             'result': 'success',
             'book_id': book_id,
@@ -550,7 +547,7 @@ def sync_missing_sidecars_to_koreader(self):
         num_fail = 0
         for book_uuid, path in sidecar_paths_not_exist.items():
             result, details = self.push_metadata_to_koreader_sidecar(book_uuid, path)
-            if result is "success":        
+            if result is "success":
                 num_success += 1
                 results.append(
                     {
@@ -559,7 +556,7 @@ def sync_missing_sidecars_to_koreader(self):
                         'sidecar_path': path,
                     }
                 )
-            elif result is "failure":        
+            elif result is "failure":
                 num_fail += 1
                 results.append(
                     {
@@ -662,18 +659,14 @@ def sync_to_calibre(self):
                     # No column mapped, so do not sync
                     continue
 
-                property = column['sidecar_property']
+                sidecar_property = column['sidecar_property']
                 value = sidecar_contents
 
-                for subproperty in property:
+                for subproperty in sidecar_property:
                     if subproperty in value:
                         value = value[subproperty]
                     else:
-                        debug_print(
-                            'subproperty "{}" not found in value'.format(
-                                subproperty
-                            )
-                        )
+                        debug_print(f'subproperty "{subproperty}" not found in value')
                         value = None
                         break
 
diff --git a/config.py b/config.py
index 95c163d..e9071cb 100644
--- a/config.py
+++ b/config.py
@@ -1,11 +1,13 @@
 #!/usr/bin/env python3
 
+"""Config for KOReader Sync plugin for Calibre."""
+
 import math
 import os
 import json
 from functools import partial
 
-from PyQt5.Qt import (  # pylint: disable=no-name-in-module
+from PyQt5.Qt import (
     QComboBox,
     QGridLayout,
     QHBoxLayout,
@@ -15,11 +17,11 @@
     Qt,
 )
 
-from PyQt5.QtGui import QPixmap   # pylint: disable=no-name-in-module
-from calibre.constants import numeric_version  # pylint: disable=no-name-in-module, disable=import-error
-from calibre.devices.usbms.driver import debug_print as root_debug_print  # pylint: disable=no-name-in-module, disable=import-error
-from calibre.utils.config import JSONConfig  # pylint: disable=no-name-in-module, disable=import-error
-from calibre_plugins.koreader import clean_bookmarks  # pylint: disable=import-error
+from PyQt5.QtGui import QPixmap
+from calibre.constants import numeric_version
+from calibre.devices.usbms.driver import debug_print as root_debug_print
+from calibre.utils.config import JSONConfig
+from calibre_plugins.koreader import clean_bookmarks
 
 __license__ = 'GNU GPLv3'
 __copyright__ = '2021, harmtemolder <mail at harmtemolder.com>'
@@ -152,8 +154,8 @@
 }]
 
 CONFIG = JSONConfig(os.path.join('plugins', 'KOReader Sync.json'))
-for column in COLUMNS:
-    CONFIG.defaults[column['name']] = ''
+for this_column in COLUMNS:
+    CONFIG.defaults[this_column['name']] = ''
 
 if numeric_version >= (5, 5, 0):
     module_debug_print = partial(root_debug_print, ' koreader:config:', sep='')
@@ -174,7 +176,10 @@ def __init__(self, plugin_action):
 
         # Add icon and title
         title_layout = TitleLayout(
-            self, 'images/icon.png', 'Configure {}'.format(self.action.version))
+            self,
+            'images/icon.png',
+            f'Configure {self.action.version}',
+        )
         layout.addLayout(title_layout)
 
         # Add custom column dropdowns
@@ -210,7 +215,7 @@ def __init__(self, parent, icon, title):
         self.addWidget(icon_label)
 
         # Add title
-        title_label = QLabel('<h2>{}</h2>'.format(title), parent)
+        title_label = QLabel(f'<h2>{title}</h2>', parent)
         self.addWidget(title_label)
 
         # Add empty space
@@ -288,8 +293,10 @@ def get_rating_columns(self):
 
 
 class CustomColumnComboBox(QComboBox):
-    def __init__(self, parent, custom_columns={}, selected_column=''):
+    def __init__(self, parent, custom_columns=None, selected_column=''):
         QComboBox.__init__(self, parent)
+        if custom_columns is None:
+            custom_columns = {}
         self.populate_combo(custom_columns, selected_column)
 
     def populate_combo(self, custom_columns, selected_column):
@@ -300,7 +307,7 @@ def populate_combo(self, custom_columns, selected_column):
 
         for key in sorted(custom_columns.keys()):
             self.column_names.append(key)
-            display_name = '{} ({})'.format(custom_columns[key]['name'], key)
+            display_name = f'{custom_columns[key]["name"]} ({key})'
             self.addItem(display_name)
             if key == selected_column:
                 selected_idx = len(self.column_names) - 1