diff --git a/README_DEV.md b/README_DEV.md
index 79e1b5d1..4d7926dc 100644
--- a/README_DEV.md
+++ b/README_DEV.md
@@ -27,6 +27,7 @@ If you want to contribute to osxphotos, please open a pull request. Here's how t
 - Make your changes
 - Add tests for your changes
 - Run the tests: `pytest`
+- Format the code: `isort .` then `black .`
 - Update the README.md and other files as needed
 - Add your changes using `git add`
 - Commit your changes: `git commit -m "My changes description"`
diff --git a/dev_requirements.txt b/dev_requirements.txt
index bddc9789..7656bc1b 100644
--- a/dev_requirements.txt
+++ b/dev_requirements.txt
@@ -1,14 +1,16 @@
+black
 build
-bump2version==1.0.1 
+bump2version==1.0.1
 cogapp>=3.3.0,<4.0.0
 furo
+isort
 m2r2==0.3.3.post2
 pdbpp
 pyinstaller==5.13.2
-pytest-cov==4.0.0 
+pytest-cov==4.0.0
 pytest-mock
 pytest==7.4.0
-ruff==0.0.286
+ruff==0.7.2
 Sphinx
 sphinx_click
 sphinx_rtd_theme
@@ -16,4 +18,4 @@ sphinx-copybutton
 sphinxcontrib-programoutput
 twine
 wheel
-setuptools>=65.5.1 # not directly required, pinned by Snyk to avoid a vulnerability
\ No newline at end of file
+setuptools>=65.5.1 # not directly required, pinned by Snyk to avoid a vulnerability
diff --git a/examples/add_finder_tags.py b/examples/add_finder_tags.py
index 3da204dc..d73dd638 100644
--- a/examples/add_finder_tags.py
+++ b/examples/add_finder_tags.py
@@ -118,7 +118,9 @@ def add_metadata_to_photo(
 ):
     """Add Finder tags to matching photo in Photos library as keywords."""
     tags = get_finder_tags(filepath, include, exclude)
-    echo(f"Finder tags for [filepath]{filepath}[/]: [i]{', '.join(tags) if tags else None}[/]")
+    echo(
+        f"Finder tags for [filepath]{filepath}[/]: [i]{', '.join(tags) if tags else None}[/]"
+    )
     if matches := fq.possible_duplicates(filepath):
         echo(
             f"Adding Finder tags to [num]{len(matches)}[/] matching photo(s) in Photos library..."
@@ -128,7 +130,9 @@ def add_metadata_to_photo(
             if not photo:
                 echo(f"Could not find photo with UUID [uuid]{match[0]}[/]", err=True)
                 continue
-            echo(f"Processing photo [filename]{photo.filename}[/] ([uuid]{photo.uuid}[/])")
+            echo(
+                f"Processing photo [filename]{photo.filename}[/] ([uuid]{photo.uuid}[/])"
+            )
             add_keywords_to_photo(photo, tags, dry_run)
             if caption:
                 add_comment_to_photo(photo, filepath, dry_run)
diff --git a/examples/timewarp_function_creation_date.py b/examples/timewarp_function_creation_date.py
index a50b6ca4..e1b480ae 100644
--- a/examples/timewarp_function_creation_date.py
+++ b/examples/timewarp_function_creation_date.py
@@ -27,7 +27,9 @@ def creation_date(
     """
 
     if not path:
-        verbose(f"Could not get path for photo {photo.original_filename} ({photo.uuid}); skipping")
+        verbose(
+            f"Could not get path for photo {photo.original_filename} ({photo.uuid}); skipping"
+        )
         return photo.date, tz_sec
 
     # this example uses's the file's creation date/time; the timezone is not changed
diff --git a/examples/top_10_unnamed_faces.py b/examples/top_10_unnamed_faces.py
index 3a3648ed..7fc7ce92 100644
--- a/examples/top_10_unnamed_faces.py
+++ b/examples/top_10_unnamed_faces.py
@@ -32,5 +32,6 @@ def main():
         album = PhotosAlbum(album_name)
         album.update(photos)
 
+
 if __name__ == "__main__":
     main()
diff --git a/osxphotos/cli/cli.py b/osxphotos/cli/cli.py
index 11ed5959..786d50f2 100644
--- a/osxphotos/cli/cli.py
+++ b/osxphotos/cli/cli.py
@@ -9,7 +9,7 @@
 
 from osxphotos._constants import PROFILE_SORT_KEYS
 from osxphotos._version import __version__
-from osxphotos.disclaim import disclaim, pyinstaller, pyapp
+from osxphotos.disclaim import disclaim, pyapp, pyinstaller
 from osxphotos.platform import is_macos
 
 from .about import about
diff --git a/osxphotos/cli/photo_inspect.py b/osxphotos/cli/photo_inspect.py
index 851cc25d..81f60be8 100644
--- a/osxphotos/cli/photo_inspect.py
+++ b/osxphotos/cli/photo_inspect.py
@@ -413,7 +413,7 @@ def get_photo_type(photo: PhotoInfo) -> str:
     if photo.screenshot:
         photo_type += " screenshot"
     if photo.screen_recording:
-        photo_type += " screen recording"        
+        photo_type += " screen recording"
     if photo.slow_mo:
         photo_type += " slow-mo"
     if photo.time_lapse:
diff --git a/osxphotos/cli/push_exif.py b/osxphotos/cli/push_exif.py
index d3700307..29ed9a58 100644
--- a/osxphotos/cli/push_exif.py
+++ b/osxphotos/cli/push_exif.py
@@ -641,10 +641,14 @@ def compare_location(photo: PhotoInfo, file_data: dict[str, Any]) -> str:
         exif_latitude_ref = file_data.get("EXIF:GPSLatitudeRef")
         exif_longitude_ref = file_data.get("EXIF:GPSLongitudeRef")
     elif photo.ismovie:
-        exif_coordinates = file_data.get('QuickTime:GPSCoordinates')
-        exif_latitude, exif_longitude = [float(x) for x in exif_coordinates.split()[:2]] if exif_coordinates else [ None, None]
+        exif_coordinates = file_data.get("QuickTime:GPSCoordinates")
+        exif_latitude, exif_longitude = (
+            [float(x) for x in exif_coordinates.split()[:2]]
+            if exif_coordinates
+            else [None, None]
+        )
         exif_latitude_ref = None
-        exif_longitude_ref = None        
+        exif_longitude_ref = None
 
     if exif_longitude and exif_longitude_ref == "W":
         exif_longitude = -exif_longitude
diff --git a/osxphotos/cli/sidecar.py b/osxphotos/cli/sidecar.py
index bb63a93c..ffbca2c8 100644
--- a/osxphotos/cli/sidecar.py
+++ b/osxphotos/cli/sidecar.py
@@ -225,9 +225,7 @@ def get_sidecar_file_with_template(
     if not sidecar_file or not sidecar_file.exists():
         if edited_suffix:
             # try again with the edited suffix removed
-            filepath = strip_edited_suffix(
-                filepath, edited_suffix, exiftool_path
-            )
+            filepath = strip_edited_suffix(filepath, edited_suffix, exiftool_path)
             return get_sidecar_file_with_template(
                 filepath,
                 sidecar,
diff --git a/osxphotos/cli/sync.py b/osxphotos/cli/sync.py
index b6439525..47a98736 100644
--- a/osxphotos/cli/sync.py
+++ b/osxphotos/cli/sync.py
@@ -379,7 +379,7 @@ def import_metadata_for_photo(
         # If --set use origin location in the destination photo
         results += _set_location_for_photo(photo, metadata, dry_run, verbose)
     elif "location" in merge:
-        # if --merge 
+        # if --merge
         #   and property is set in the destination then no action is taken;
         #   if property is not set in the destination but is set in the source,
         #      then the value is copied to destination.
@@ -390,6 +390,7 @@ def import_metadata_for_photo(
 
     return results
 
+
 def _process_location_for_photo(
     photo: PhotoInfo,
     metadata: dict[str, Any],
@@ -433,7 +434,8 @@ def _process_location_for_photo(
         field,
         updated,
         before,
-        value)
+        value,
+    )
     return results
 
 
@@ -520,7 +522,7 @@ def _set_metadata_for_photo(
 
         value = metadata[field]
         before = getattr(photo, field)
-    
+
         if isinstance(value, list):
             value = sorted(value)
         if isinstance(before, list):
diff --git a/osxphotos/cli/timewarp.py b/osxphotos/cli/timewarp.py
index 17ac4080..dd862d37 100644
--- a/osxphotos/cli/timewarp.py
+++ b/osxphotos/cli/timewarp.py
@@ -532,7 +532,7 @@ def timewarp_cli(
 
     if inspect and compare_exif:
         raise click.UsageError("--inspect and --compare-exif are mutually exclusive.")
-    
+
     if date and date_delta:
         raise click.UsageError("--date and --date-delta are mutually exclusive.")
 
diff --git a/osxphotos/compare_exif.py b/osxphotos/compare_exif.py
index 20d38856..dd0ec05a 100644
--- a/osxphotos/compare_exif.py
+++ b/osxphotos/compare_exif.py
@@ -94,10 +94,11 @@ def timewarp_compare_exif(self, photo: Photo, plain: bool = False) -> ExifDiff:
         Args:
             photo (Photo): Photo object to compare
             plain (bool): Flag to determine if plain (True) or markup (False) should be applied
-        """ 
+        """
+
         def compare_values(photo_value: str, exif_value: str) -> tuple:
             """Compare two values and return them with or without markup.
-            
+
             Affects nonlocal variable diff (from timewarp_compare_exif) with result.
             """
 
@@ -110,7 +111,7 @@ def compare_values(photo_value: str, exif_value: str) -> tuple:
                 if not plain:
                     return no_change(photo_value), no_change(exif_value)
             return photo_value, exif_value
-        
+
         # Get values from comparison function
         photos_date, photos_tz, exif_date, exif_tz = self.compare_exif(photo)
         diff = False
@@ -136,4 +137,3 @@ def compare_values(photo_value: str, exif_value: str) -> tuple:
             exif_time,
             exif_tz,
         )
-    
\ No newline at end of file
diff --git a/osxphotos/export_db_utils.py b/osxphotos/export_db_utils.py
index 0fde32ff..7e68300b 100644
--- a/osxphotos/export_db_utils.py
+++ b/osxphotos/export_db_utils.py
@@ -9,8 +9,8 @@
 import pathlib
 import sqlite3
 from typing import Any, Callable, Optional, Tuple, Union
-import tenacity
 
+import tenacity
 import toml
 from rich import print
 
diff --git a/osxphotos/photoexporter.py b/osxphotos/photoexporter.py
index a8695ac1..739e333c 100644
--- a/osxphotos/photoexporter.py
+++ b/osxphotos/photoexporter.py
@@ -589,8 +589,7 @@ def _stage_photos_for_export(self, options: ExportOptions) -> StagedFiles:
         staged = StagedFiles()
 
         if options.use_photos_export:
-            return self._stage_missing_photos_for_export_helper(
-                options=options)
+            return self._stage_missing_photos_for_export_helper(options=options)
 
         if options.raw_photo and self.photo.has_raw:
             staged.raw = self.photo.path_raw
@@ -648,7 +647,8 @@ def _stage_missing_photos_for_export(
             use_photokit=options.use_photokit,
         )
         missing_staged = self._stage_missing_photos_for_export_helper(
-            options=missing_options)
+            options=missing_options
+        )
         staged |= missing_staged
         return staged
 
@@ -1233,7 +1233,10 @@ def _export_aae(
         if action == "skip":
             if dest.exists():
                 options.export_db.set_history(
-                    filename=str(dest), uuid=self.photo.uuid, action=f"AAE: {action}", diff=None
+                    filename=str(dest),
+                    uuid=self.photo.uuid,
+                    action=f"AAE: {action}",
+                    diff=None,
                 )
                 return ExportResults(aae_skipped=[str(dest)], skipped=[str(dest)])
             else:
diff --git a/osxphotos/photoinfo_protocol.py b/osxphotos/photoinfo_protocol.py
index 8bd6689c..924cab22 100644
--- a/osxphotos/photoinfo_protocol.py
+++ b/osxphotos/photoinfo_protocol.py
@@ -23,6 +23,7 @@
 
 __all__ = ["PhotoInfoProtocol", "PhotoInfoMixin"]
 
+
 @runtime_checkable
 class PhotoInfoProtocol(Protocol):
     @property
diff --git a/osxphotos/photokit.py b/osxphotos/photokit.py
index ea7b4e79..3fd036ba 100644
--- a/osxphotos/photokit.py
+++ b/osxphotos/photokit.py
@@ -353,7 +353,9 @@ def screenshot(self):
     @property
     def screen_recording(self):
         """return True if asset is screen recordings, otherwise False"""
-        return bool(self.media_subtypes & Photos.PHAssetMediaSubtypePhotoScreenRecording)
+        return bool(
+            self.media_subtypes & Photos.PHAssetMediaSubtypePhotoScreenRecording
+        )
 
     @property
     def live(self):
diff --git a/osxphotos/photokit_utils.py b/osxphotos/photokit_utils.py
index 8122d87f..e48e66ed 100644
--- a/osxphotos/photokit_utils.py
+++ b/osxphotos/photokit_utils.py
@@ -16,6 +16,7 @@
 # seconds to sleep between authorization check
 AUTHORIZATION_SLEEP = 0.25
 
+
 def wait_for_photokit_authorization() -> bool:
     """Request and wait for authorization to access Photos library."""
     if check_photokit_authorization():
diff --git a/osxphotos/photosalbum.py b/osxphotos/photosalbum.py
index b0d20fab..7d142c75 100644
--- a/osxphotos/photosalbum.py
+++ b/osxphotos/photosalbum.py
@@ -198,6 +198,7 @@ def extend(self, photos: Iterable[Photo]):
         """Add list of photos to album"""
         self.update(photos)
 
+
 class PhotosAlbumPhotoScriptByPath(PhotosAlbumPhotoScript):
     """Add photoscript.Photo objects to album"""
 
diff --git a/osxphotos/photosdb/photosdb_utils.py b/osxphotos/photosdb/photosdb_utils.py
index 81345ff2..b1ab798c 100644
--- a/osxphotos/photosdb/photosdb_utils.py
+++ b/osxphotos/photosdb/photosdb_utils.py
@@ -16,11 +16,11 @@
     _PHOTOS_6_MODEL_VERSION,
     _PHOTOS_7_MODEL_VERSION,
     _PHOTOS_8_MODEL_VERSION,
+    _PHOTOS_9_14_6_MODEL_VERSION,
     _PHOTOS_9_MODEL_VERSION,
     _PHOTOS_10_MODEL_VERSION,
     _PHOTOS_10B1_MODEL_VERSION,
     _TESTED_DB_VERSIONS,
-    _PHOTOS_9_14_6_MODEL_VERSION,
 )
 from ..sqlite_utils import sqlite_open_ro
 
diff --git a/osxphotos/phototemplate.py b/osxphotos/phototemplate.py
index a33fef09..3b6e974f 100644
--- a/osxphotos/phototemplate.py
+++ b/osxphotos/phototemplate.py
@@ -9,7 +9,7 @@
 import sys
 from contextlib import suppress
 from dataclasses import dataclass
-from typing import List, Optional, Tuple, TYPE_CHECKING
+from typing import TYPE_CHECKING, List, Optional, Tuple
 
 from textx import TextXSyntaxError, metamodel_from_file
 
diff --git a/tests/test_cli_push_exif.py b/tests/test_cli_push_exif.py
index ff853477..3d01a868 100644
--- a/tests/test_cli_push_exif.py
+++ b/tests/test_cli_push_exif.py
@@ -750,7 +750,9 @@ def test_cli_push_exif_metadata_arg(monkeypatch):
         assert "EXIF:CreateDate" not in exif
 
         # verify faces were pushed
-        assert sorted(get_exiftool_tag_as_list(photo, "XMP:RegionsRegionListName")) == sorted(photo.persons)
+        assert sorted(
+            get_exiftool_tag_as_list(photo, "XMP:RegionsRegionListName")
+        ) == sorted(photo.persons)
 
         # clear metadata
         photosdb = PhotosDB(test_library)
diff --git a/tests/test_cli_sync.py b/tests/test_cli_sync.py
index 8ec0312d..62a93002 100644
--- a/tests/test_cli_sync.py
+++ b/tests/test_cli_sync.py
@@ -121,6 +121,7 @@ def test_sync_export_import():
             assert report_data[uuid]["albums"]["updated"]
             assert not report_data[uuid]["error"]
 
+
 @pytest.mark.test_sync
 def test_sync_export_import_location():
     """Test --export and --import location"""
diff --git a/tests/test_sidecar_utils.py b/tests/test_sidecar_utils.py
index 14dc4a28..7e7a2a71 100644
--- a/tests/test_sidecar_utils.py
+++ b/tests/test_sidecar_utils.py
@@ -102,6 +102,7 @@ def test_get_sidecar_file_with_template(tmp_path, data):
         (tmp_path / file).touch()
 
     import logging
+
     sidecar_name = get_sidecar_file_with_template(
         tmp_path / data["files"][0],
         data["sidecar"],
diff --git a/tests/test_timezones.py b/tests/test_timezones.py
index c2ed5b10..0fe247bf 100644
--- a/tests/test_timezones.py
+++ b/tests/test_timezones.py
@@ -36,12 +36,14 @@ def test_timezone_by_offset():
     assert tz.offset_str == "-05:00"
     assert isinstance(tz.tzinfo(datetime.datetime.now()), ZoneInfo)
 
+
 @pytest.mark.skipif(not is_macos, reason="macOS only")
 def test_timezone_invalid_zone():
     """Test that Timezone creation fails with an invalid zone name."""
     with pytest.raises(ValueError, match="Invalid timezone: Invalid/Zone"):
         Timezone("Invalid/Zone")
 
+
 @pytest.mark.skipif(not is_macos, reason="macOS only")
 def test_timezone_invalid_offset():
     """Test that Timezone creation fails with bad input type."""