diff --git a/unwind/db.py b/unwind/db.py
index e32d4c0..4a4fc68 100644
--- a/unwind/db.py
+++ b/unwind/db.py
@@ -119,7 +119,6 @@ async def apply_db_patches(db: Database):
             raise RuntimeError("No statement found.")
 
         async with db.transaction():
-
             for query in queries:
                 await db.execute(query)
 
diff --git a/unwind/imdb.py b/unwind/imdb.py
index 9288e6f..5b56b3f 100644
--- a/unwind/imdb.py
+++ b/unwind/imdb.py
@@ -35,12 +35,10 @@ log = logging.getLogger(__name__)
 
 
 async def refresh_user_ratings_from_imdb(stop_on_dupe=True):
-
     with session() as s:
         s.headers["Accept-Language"] = "en-US, en;q=0.5"
 
         for user in await db.get_all(User):
-
             log.info("⚡️ Loading data for %s ...", user.name)
 
             try:
@@ -97,7 +95,6 @@ find_movie_id = re.compile(r"/title/(?P<id>tt\d+)/").search
 
 
 def movie_and_rating_from_item(item) -> tuple[Movie, Rating]:
-
     genres = (genre := item.find("span", "genre")) and genre.string or ""
     movie = Movie(
         title=item.h3.a.string.strip(),
@@ -169,7 +166,6 @@ async def parse_page(url) -> tuple[list[Rating], str | None]:
 
     items = soup.find_all("div", "lister-item-content")
     for i, item in enumerate(items):
-
         try:
             movie, rating = movie_and_rating_from_item(item)
         except Exception as err:
@@ -199,7 +195,6 @@ async def load_ratings(user_id):
     next_url = user_ratings_url(user_id)
 
     while next_url:
-
         ratings, next_url = await parse_page(next_url)
 
         for i, rating in enumerate(ratings):
diff --git a/unwind/imdb_import.py b/unwind/imdb_import.py
index 3557993..3991a78 100644
--- a/unwind/imdb_import.py
+++ b/unwind/imdb_import.py
@@ -111,11 +111,10 @@ def gz_mtime(path: Path) -> datetime:
 def count_lines(path: Path) -> int:
     i = 0
 
-    one_mb = 2 ** 20
+    one_mb = 2**20
     buf_size = 8 * one_mb  # 8 MiB seems to give a good read/process performance.
 
     with gzip.open(path, "rt") as f:
-
         while buf := f.read(buf_size):
             i += buf.count("\n")
 
@@ -138,7 +137,6 @@ def read_imdb_tsv(
 
 def read_imdb_tsv(path: Path, row_type, *, unpack=True):
     with gzip.open(path, "rt", newline="") as f:
-
         rows = csv.reader(f, delimiter="\t", quoting=csv.QUOTE_NONE)
 
         # skip header line
@@ -205,7 +203,6 @@ async def import_from_file(*, basics_path: Path, ratings_path: Path):
     chunk = []
 
     for i, m in enumerate(read_basics(basics_path)):
-
         perc = 100 * i / total
         if perc >= perc_next_report:
             await db.set_import_progress(perc)
diff --git a/unwind/models.py b/unwind/models.py
index 70ffe26..8922e5b 100644
--- a/unwind/models.py
+++ b/unwind/models.py
@@ -41,7 +41,6 @@ def fields(class_or_instance):
     # XXX this might be a little slow (not sure), if so, memoize
 
     for f in _fields(class_or_instance):
-
         if f.name == "_is_lazy":
             continue
 
@@ -108,7 +107,6 @@ def asplain(
 
     d: JSONObject = {}
     for f in fields(o):
-
         if filter_fields is not None and f.name not in filter_fields:
             continue
 
@@ -156,7 +154,6 @@ def fromplain(cls: Type[T], d: dict[str, Any], *, serialized: bool = False) -> T
 
     dd: JSONObject = {}
     for f in fields(cls):
-
         target = f.type
         otype = optional_type(f.type)
         is_opt = otype is not None
diff --git a/unwind/request.py b/unwind/request.py
index 3b78872..c4866ea 100644
--- a/unwind/request.py
+++ b/unwind/request.py
@@ -77,7 +77,6 @@ def Session() -> requests.Session:
 def throttle(
     times: int, per_seconds: float, jitter: Callable[[], float] | None = None
 ) -> Callable[[Callable], Callable]:
-
     calls: deque[float] = deque(maxlen=times)
 
     if jitter is None:
@@ -86,7 +85,6 @@ def throttle(
     def decorator(func: Callable) -> Callable:
         @wraps(func)
         def inner(*args, **kwds):
-
             # clean up
             while calls:
                 if calls[0] + per_seconds > time():
@@ -151,7 +149,6 @@ def cache_path(req) -> Path | None:
 
 @throttle(1, 1, random)
 def http_get(s: requests.Session, url: str, *args, **kwds) -> requests.Response:
-
     req = s.prepare_request(requests.Request("GET", url, *args, **kwds))
 
     cachefile = cache_path(req) if config.debug else None
@@ -244,7 +241,6 @@ def download(
             raise FileExistsError(23, "Would replace existing file", str(file_path))
 
     with session() as s:
-
         headers = {}
         if file_exists and only_if_newer:
             assert file_path
@@ -300,7 +296,7 @@ def download(
         tempfd, tempfile_path = tempfile.mkstemp(
             dir=tempdir, prefix=f".download-{file_path.name}."
         )
-        one_mb = 2 ** 20
+        one_mb = 2**20
         chunk_size = 8 * one_mb
         try:
             log.debug("💾 Writing to temp file %s ...", tempfile_path)
diff --git a/unwind/utils.py b/unwind/utils.py
index efe9f17..f253bde 100644
--- a/unwind/utils.py
+++ b/unwind/utils.py
@@ -33,7 +33,7 @@ def phc_scrypt(
     if salt is None:
         salt = secrets.token_bytes(16)
 
-    n = params.get("n", 2 ** 14)  # CPU/Memory cost factor
+    n = params.get("n", 2**14)  # CPU/Memory cost factor
     r = params.get("r", 8)  # block size
     p = params.get("p", 1)  # parallelization factor
     # maxmem = 2 * 128 * n * r * p
diff --git a/unwind/web.py b/unwind/web.py
index dbe39bc..cab9a9e 100644
--- a/unwind/web.py
+++ b/unwind/web.py
@@ -195,7 +195,6 @@ route.registered = _routes
 
 @route("/groups/{group_id}/ratings")
 async def get_ratings_for_group(request):
-
     group_id = as_ulid(request.path_params["group_id"])
     group = await db.get(Group, id=str(group_id))
 
@@ -256,7 +255,6 @@ def not_implemented():
 @route("/movies")
 @requires(["authenticated"])
 async def list_movies(request):
-
     params = request.query_params
 
     user = await auth_user(request)
@@ -324,7 +322,6 @@ async def list_movies(request):
 @route("/movies", methods=["POST"])
 @requires(["authenticated", "admin"])
 async def add_movie(request):
-
     not_implemented()
 
 
@@ -366,7 +363,6 @@ _import_lock = asyncio.Lock()
 @route("/movies/_reload_imdb", methods=["POST"])
 @requires(["authenticated", "admin"])
 async def load_imdb_movies(request):
-
     params = request.query_params
     force = truthy(params.get("force"))
 
@@ -389,7 +385,6 @@ async def load_imdb_movies(request):
 @route("/users")
 @requires(["authenticated", "admin"])
 async def list_users(request):
-
     users = await db.get_all(User)
 
     return JSONResponse([asplain(u) for u in users])
@@ -398,7 +393,6 @@ async def list_users(request):
 @route("/users", methods=["POST"])
 @requires(["authenticated", "admin"])
 async def add_user(request):
-
     name, imdb_id = await json_from_body(request, ["name", "imdb_id"])
 
     # XXX restrict name
@@ -420,7 +414,6 @@ async def add_user(request):
 @route("/users/{user_id}")
 @requires(["authenticated"])
 async def show_user(request):
-
     user_id = as_ulid(request.path_params["user_id"])
 
     if is_admin(request):
@@ -449,7 +442,6 @@ async def show_user(request):
 @route("/users/{user_id}", methods=["DELETE"])
 @requires(["authenticated", "admin"])
 async def remove_user(request):
-
     user_id = as_ulid(request.path_params["user_id"])
 
     user = await db.get(User, id=str(user_id))
@@ -467,7 +459,6 @@ async def remove_user(request):
 @route("/users/{user_id}", methods=["PATCH"])
 @requires(["authenticated"])
 async def modify_user(request):
-
     user_id = as_ulid(request.path_params["user_id"])
 
     if is_admin(request):
@@ -515,7 +506,6 @@ async def modify_user(request):
 @route("/users/{user_id}/groups", methods=["POST"])
 @requires(["authenticated", "admin"])
 async def add_group_to_user(request):
-
     user_id = as_ulid(request.path_params["user_id"])
 
     user = await db.get(User, id=str(user_id))
@@ -540,21 +530,18 @@ async def add_group_to_user(request):
 @route("/users/{user_id}/ratings")
 @requires(["private"])
 async def ratings_for_user(request):
-
     not_implemented()
 
 
 @route("/users/{user_id}/ratings", methods=["PUT"])
 @requires("authenticated")
 async def set_rating_for_user(request):
-
     not_implemented()
 
 
 @route("/users/_reload_ratings", methods=["POST"])
 @requires(["authenticated", "admin"])
 async def load_imdb_user_ratings(request):
-
     ratings = [rating async for rating in imdb.refresh_user_ratings_from_imdb()]
 
     return JSONResponse({"new_ratings": [asplain(r) for r in ratings]})
@@ -563,7 +550,6 @@ async def load_imdb_user_ratings(request):
 @route("/groups")
 @requires(["authenticated", "admin"])
 async def list_groups(request):
-
     groups = await db.get_all(Group)
 
     return JSONResponse([asplain(g) for g in groups])
@@ -572,7 +558,6 @@ async def list_groups(request):
 @route("/groups", methods=["POST"])
 @requires(["authenticated", "admin"])
 async def add_group(request):
-
     (name,) = await json_from_body(request, ["name"])
 
     # XXX restrict name
@@ -586,7 +571,6 @@ async def add_group(request):
 @route("/groups/{group_id}/users", methods=["POST"])
 @requires(["authenticated"])
 async def add_user_to_group(request):
-
     group_id = as_ulid(request.path_params["group_id"])
     group = await db.get(Group, id=str(group_id))