diff --git a/examples/miniapps/boto3-session/boto3_session_example.py b/examples/miniapps/boto3-session/boto3_session_example.py
index 33277513..85a3e391 100644
--- a/examples/miniapps/boto3-session/boto3_session_example.py
+++ b/examples/miniapps/boto3-session/boto3_session_example.py
@@ -23,12 +23,12 @@ class Container(containers.DeclarativeContainer):
 
     s3_client = providers.Resource(
         session.provided.client.call(),
-        service_name='s3',
+        service_name="s3",
     )
 
     sqs_client = providers.Resource(
         providers.MethodCaller(session.provided.client),  # Alternative syntax
-        service_name='sqs',
+        service_name="sqs",
     )
 
     service1 = providers.Factory(
@@ -39,16 +39,16 @@ class Container(containers.DeclarativeContainer):
 
     service2 = providers.Factory(
         Service,
-        s3_client=session.provided.client.call(service_name='s3'),    # Alternative inline syntax
-        sqs_client=session.provided.client.call(service_name='sqs'),  # Alternative inline syntax
+        s3_client=session.provided.client.call(service_name="s3"),    # Alternative inline syntax
+        sqs_client=session.provided.client.call(service_name="sqs"),  # Alternative inline syntax
     )
 
 
 def main():
     container = Container()
-    container.config.aws_access_key_id.from_env('AWS_ACCESS_KEY_ID')
-    container.config.aws_secret_access_key.from_env('AWS_SECRET_ACCESS_KEY')
-    container.config.aws_session_token.from_env('AWS_SESSION_TOKEN')
+    container.config.aws_access_key_id.from_env("AWS_ACCESS_KEY_ID")
+    container.config.aws_secret_access_key.from_env("AWS_SECRET_ACCESS_KEY")
+    container.config.aws_session_token.from_env("AWS_SESSION_TOKEN")
     container.init_resources()
 
     s3_client = container.s3_client()
@@ -68,5 +68,5 @@ def main():
     assert service2.sqs_client is sqs_client
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     main()