diff --git a/client/docs/source/conf.py b/client/docs/source/conf.py
index 3bc082f..e614472 100644
--- a/client/docs/source/conf.py
+++ b/client/docs/source/conf.py
@@ -104,6 +104,7 @@
 # so a file named "default.css" will overwrite the builtin "default.css".
 html_static_path = ["_static"]
 
+
 # Add googleanalytics id
 # ref: https://github.com/orenhecht/googleanalytics/blob/master/sphinxcontrib/googleanalytics.py
 def add_ga_javascript(app, pagename, templatename, context, doctree):
diff --git a/client/pyrostorage/client.py b/client/pyrostorage/client.py
index f00def9..e8b3996 100644
--- a/client/pyrostorage/client.py
+++ b/client/pyrostorage/client.py
@@ -144,9 +144,13 @@ def create_annotation(self, media_id: int, observations: List[str]) -> Response:
             HTTP response containing the created annotation
         """
 
-        return requests.post(self.routes["create-annotation"], headers=self.headers, json={"media_id": media_id, observations: observations})
+        return requests.post(
+            self.routes["create-annotation"],
+            headers=self.headers,
+            json={"media_id": media_id, observations: observations},
+        )
 
-    def update_annotation(self, annotation_id: int, observations: List[str]=None) -> Response:
+    def update_annotation(self, annotation_id: int, observations: List[str] = None) -> Response:
         """Update an annotation entry
 
         Example::
@@ -161,4 +165,8 @@ def update_annotation(self, annotation_id: int, observations: List[str]=None) ->
         Returns:
             HTTP response containing the updated annotation
         """
-        return requests.post(f'self.routes["update-annotation"]/{annotation_id}', headers=self.headers, json={"observations": observations})
+        return requests.post(
+            f'self.routes["update-annotation"]/{annotation_id}',
+            headers=self.headers,
+            json={"observations": observations},
+        )
diff --git a/src/app/api/schemas.py b/src/app/api/schemas.py
index 004a555..513f0af 100644
--- a/src/app/api/schemas.py
+++ b/src/app/api/schemas.py
@@ -90,8 +90,10 @@ class AnnotationIn(BaseModel):
     media_id: int = Field(..., gt=0)
     observations: List[ObservationType]
 
+
 class AnnotationUpdateIn(BaseModel):
     observations: List[ObservationType]
 
+
 class AnnotationOut(AnnotationIn, _CreatedAt, _Id):
     pass
diff --git a/src/app/db/models.py b/src/app/db/models.py
index 5111af0..38a14bf 100644
--- a/src/app/db/models.py
+++ b/src/app/db/models.py
@@ -5,7 +5,7 @@
 
 import enum
 
-from sqlalchemy import Column, DateTime, Enum, ForeignKey, Integer, String, ARRAY
+from sqlalchemy import ARRAY, Column, DateTime, Enum, ForeignKey, Integer, String
 from sqlalchemy.orm import relationship
 from sqlalchemy.sql import func
 
@@ -53,6 +53,7 @@ class ObservationType(str, enum.Enum):
     sky: str = "sky"
     smoke: str = "smoke"
 
+
 class Annotations(Base):
     __tablename__ = "annotations"
 
diff --git a/src/tests/routes/test_annotations.py b/src/tests/routes/test_annotations.py
index 9af7e73..365bfbb 100644
--- a/src/tests/routes/test_annotations.py
+++ b/src/tests/routes/test_annotations.py
@@ -6,11 +6,10 @@
 
 from app import db
 from app.api import crud
+from app.db.models import ObservationType
 from tests.db_utils import TestSessionLocal, fill_table, get_entry
 from tests.utils import update_only_datetime
 
-from app.db.models import ObservationType
-
 ACCESS_TABLE = [
     {"id": 1, "login": "first_login", "hashed_password": "hashed_pwd", "scope": "user"},
     {"id": 2, "login": "second_login", "hashed_password": "hashed_pwd", "scope": "admin"},
@@ -22,7 +21,12 @@
 ]
 
 ANNOTATIONS_TABLE = [
-    {"id": 1, "media_id": 1, "observations": [ObservationType.fire, ObservationType.smoke, ObservationType.clouds], "created_at": "2020-10-13T08:18:45.447773"},
+    {
+        "id": 1,
+        "media_id": 1,
+        "observations": [ObservationType.fire, ObservationType.smoke, ObservationType.clouds],
+        "created_at": "2020-10-13T08:18:45.447773",
+    },
     {"id": 2, "media_id": 2, "observations": [], "created_at": "2022-10-13T08:18:45.447773"},
 ]