diff --git a/docs_src/cors/tutorial001.py b/docs_src/cors/tutorial001.py
index 24483a17b..d33e6546a 100644
--- a/docs_src/cors/tutorial001.py
+++ b/docs_src/cors/tutorial001.py
@@ -15,7 +15,7 @@ app.add_middleware(
         allow_origins=origins,
         allow_credentials=True,
         allow_methods=["*"],
-        allow_headers=["*"]
+        allow_headers=["*"],
     )
 )