diff --git a/crud.py b/crud.py
index f5e1f39..6f453f2 100644
--- a/crud.py
+++ b/crud.py
@@ -1,14 +1,19 @@
-from sqlalchemy.orm import Session
-from sqlalchemy import DECIMAL, cast
 
-import models, schemas
+from sqlalchemy import DECIMAL, cast
+from sqlalchemy.orm import Session
+
+import models
+import schemas
+
 
 def get_items(db: Session) -> list[models.Item]:
     return db.query(models.Item).all()
 
 
 def put_item(db: Session, id: str, item: schemas.Item):
-    updated = bool(db.query(models.Item).filter(models.Item.id == id).update(item.dict()))
+    updated = bool(
+        db.query(models.Item).filter(models.Item.id == id).update(item.dict())
+    )
     if not updated:
         db.add(models.Item(**item.dict()))
     db.commit()
diff --git a/main.py b/main.py
index ecaeea6..dbc0409 100644
--- a/main.py
+++ b/main.py
@@ -1,9 +1,10 @@
+import re
+
 from fastapi import Depends, FastAPI, Response
 from fastapi.staticfiles import StaticFiles
 from sqlalchemy import event
-from sqlalchemy.orm import Session
 from sqlalchemy.engine import Engine
-import re
+from sqlalchemy.orm import Session
 
 import crud
 from database import SessionLocal, engine
@@ -14,6 +15,7 @@ Base.metadata.create_all(bind=engine)
 
 app = FastAPI()
 
+
 def get_db():
     db = SessionLocal()
     try:
@@ -21,6 +23,7 @@ def get_db():
     finally:
         db.close()
 
+
 @event.listens_for(Engine, "connect")
 def _set_sqlite_pragma(conn, _):
     cursor = conn.cursor()
@@ -31,21 +34,24 @@ def _set_sqlite_pragma(conn, _):
 @app.get("/api/items", response_model=dict[str, Item])
 async def list_items(db: Session = Depends(get_db)):
     # natural sort by id
-    natsort = lambda item: [int(t) if t.isdigit() else t.lower() for t in re.split('(\d+)', item.id)]
+    natsort = lambda item: [
+        int(t) if t.isdigit() else t.lower() for t in re.split("(\d+)", item.id)
+    ]
     items = crud.get_items(db)
     items = sorted(items, key=natsort)
-    return {i.id:i for i in items}
+    return {i.id: i for i in items}
 
 
 @app.put("/api/items/{id}")
 async def put_item(id: str, item: Item, db: Session = Depends(get_db)):
     if crud.put_item(db, id, item):
-        return Response(b'', status_code=204)
-    return Response(b'', status_code=201)
+        return Response(b"", status_code=204)
+    return Response(b"", status_code=201)
 
 
 @app.delete("/api/items/{id}", status_code=204)
 async def delete_item(id: str, db: Session = Depends(get_db)):
     crud.delete_item(db, id)
 
+
 app.mount("/", StaticFiles(directory="static", html=True), name="static")
diff --git a/models.py b/models.py
index d7618a6..7aa9b21 100644
--- a/models.py
+++ b/models.py
@@ -1,7 +1,8 @@
-from sqlalchemy import Column, ForeignKey, String, Text, Boolean
+from sqlalchemy import Boolean, Column, ForeignKey, String, Text
 
 from database import Base
 
+
 class Item(Base):
     __tablename__ = "items"