diff --git a/npbackup/configuration.py b/npbackup/configuration.py
index ccdd4c0..8ff363e 100644
--- a/npbackup/configuration.py
+++ b/npbackup/configuration.py
@@ -177,7 +177,7 @@ empty_config_dict = {
             "repo_opts": {
                 "repo_password": None,
                 "repo_password_command": None,
-                "compression": "auto", # Can be auto, max, off
+                "compression": "auto",  # Can be auto, max, off
                 # Minimum time between two backups, in minutes
                 # Set to zero in order to disable time checks
                 "minimum_backup_age": 1435,
@@ -848,28 +848,26 @@ def _migrate_config_dict(full_config: dict, old_version: str, new_version: str)
                 f"{object_type} {object_name} has no retention policy, skipping migration"
             )
         return full_config
-    
+
     def _migrate_compression_3_0_0_to_3_0_4(
         full_config: dict,
         object_name: str,
         object_type: str,
     ) -> dict:
         try:
-            if full_config.g(
-                f"{object_type}.{object_name}.repo_opts.compression"
-            ) is None and f"{object_type}.{object_name}.backup_opts.compression" is not None:
+            if (
+                full_config.g(f"{object_type}.{object_name}.repo_opts.compression")
+                is None
+                and f"{object_type}.{object_name}.backup_opts.compression" is not None
+            ):
                 full_config.s(
                     f"{object_type}.{object_name}.repo_opts.compression",
                     full_config.g(
                         f"{object_type}.{object_name}.backup_opts.compression"
                     ),
                 )
-                full_config.d(
-                    f"{object_type}.{object_name}.backup_opts.compression"
-                )
-                logger.info(
-                    f"Migrated {object_name} compression to repo_opts"
-                )
+                full_config.d(f"{object_type}.{object_name}.backup_opts.compression")
+                logger.info(f"Migrated {object_name} compression to repo_opts")
         except KeyError:
             logger.info(
                 f"{object_type} {object_name} has no compression, skipping migration"
diff --git a/npbackup/gui/config.py b/npbackup/gui/config.py
index b63e858..ff256a7 100644
--- a/npbackup/gui/config.py
+++ b/npbackup/gui/config.py
@@ -1222,18 +1222,14 @@ def config_gui(full_config: dict, config_file: str):
                             ),
                         ],
                         [
-                            sg.Text(
-                                _t("config_gui.pack_size"), size=(20, 1)
-                            ),
+                            sg.Text(_t("config_gui.pack_size"), size=(20, 1)),
                             sg.Image(
                                 NON_INHERITED_ICON,
                                 key="inherited.backup_opts.pack_size",
                                 tooltip=_t("config_gui.group_inherited"),
                                 pad=1,
                             ),
-                            sg.Input(
-                                key="backup_opts.pack_size", size=(8, 1)
-                            ),
+                            sg.Input(key="backup_opts.pack_size", size=(8, 1)),
                         ],
                     ]
                 ),
@@ -1603,7 +1599,8 @@ def config_gui(full_config: dict, config_file: str):
                     NON_INHERITED_ICON,
                     key="inherited_repo_group",
                     tooltip=_t("config_gui.group_inherited"),
-                    pad=1),
+                    pad=1,
+                ),
                 sg.Combo(
                     values=configuration.get_group_list(full_config),
                     key="repo_group",
diff --git a/npbackup/restic_wrapper/__init__.py b/npbackup/restic_wrapper/__init__.py
index d3527b0..c13bcd3 100644
--- a/npbackup/restic_wrapper/__init__.py
+++ b/npbackup/restic_wrapper/__init__.py
@@ -275,7 +275,7 @@ class ResticRunner:
             self._no_lock = value
         else:
             raise ValueError("Bogus no_lock value given")
-        
+
     @property
     def compression(self) -> str:
         return self._compression
@@ -297,7 +297,7 @@ class ResticRunner:
             self._pack_size = value
         else:
             raise ValueError("Bogus pack_size value given")
-    
+
     @property
     def json_output(self) -> bool:
         return self._json_output