diff --git a/airflow/providers/amazon/aws/hooks/step_function.py b/airflow/providers/amazon/aws/hooks/step_function.py
index 97ffb10c04147..0e0cb1ced7019 100644
--- a/airflow/providers/amazon/aws/hooks/step_function.py
+++ b/airflow/providers/amazon/aws/hooks/step_function.py
@@ -32,7 +32,7 @@ class StepFunctionHook(AwsBaseHook):
         :class:`~airflow.providers.amazon.aws.hooks.base_aws.AwsBaseHook`
     """
 
-    def __init__(self, region_name: Optional[str] = None, *args, **kwargs) -> None:
+    def __init__(self, *args, **kwargs) -> None:
         kwargs["client_type"] = "stepfunctions"
         super().__init__(*args, **kwargs)