diff --git a/examples/quickstart/service.py b/examples/quickstart/service.py
index c2e356cc37..86b1562b58 100644
--- a/examples/quickstart/service.py
+++ b/examples/quickstart/service.py
@@ -9,7 +9,9 @@
 
 
 @svc.api(
-    input=NumpyNdarray.from_sample(np.array([[4.9, 3.0, 1.4, 0.2]], dtype=np.double), enforce_shape=False),
+    input=NumpyNdarray.from_sample(
+        np.array([[4.9, 3.0, 1.4, 0.2]], dtype=np.double), enforce_shape=False
+    ),
     output=NumpyNdarray(),
 )
 async def classify(input_series: np.ndarray) -> np.ndarray: