diff --git a/03-fastapi/src/worker.py b/03-fastapi/src/worker.py
index 54a8cf5..a07a53a 100644
--- a/03-fastapi/src/worker.py
+++ b/03-fastapi/src/worker.py
@@ -1,21 +1,29 @@
 from fastapi import FastAPI, Request
 from pydantic import BaseModel
 
+
 async def on_fetch(request, env):
     import asgi
 
     return await asgi.fetch(app, request, env)
 
+
 app = FastAPI()
 
+
 @app.get("/")
 async def root():
     return {"message": "Hello, World!"}
 
+
 @app.get("/env")
-async def root(req: Request):
+async def env(req: Request):
     env = req.scope["env"]
-    return {"message": "Here is an example of getting an environment variable: " + env.MESSAGE}
+    return {
+        "message": "Here is an example of getting an environment variable: "
+        + env.MESSAGE
+    }
+
 
 class Item(BaseModel):
     name: str
@@ -23,17 +31,20 @@ class Item(BaseModel):
     price: float
     tax: float | None = None
 
+
 @app.post("/items/")
 async def create_item(item: Item):
     return item
 
+
 @app.put("/items/{item_id}")
-async def create_item(item_id: int, item: Item, q: str | None = None):
-    result = {"item_id": item_id, **item.dict()}
+async def update_item(item_id: int, item: Item, q: str | None = None):
+    result = {"item_id": item_id, **item.model_dump()}
     if q:
         result.update({"q": q})
     return result
 
+
 @app.get("/items/{item_id}")
 async def read_item(item_id: int):
-    return {"item_id": item_id}
\ No newline at end of file
+    return {"item_id": item_id}