diff --git a/rembg/commands/s_command.py b/rembg/commands/s_command.py
index b6f51b4..bacc490 100644
--- a/rembg/commands/s_command.py
+++ b/rembg/commands/s_command.py
@@ -276,7 +276,7 @@ def s_command(port: int, log_level: str, threads: int) -> None:
                 gr.components.Textbox(label="Arguments"),
             ],
             gr.components.Image(type="filepath", label="Output"),
-            concurrency_limit=3
+            concurrency_limit=3,
         )
 
         app = gr.mount_gradio_app(app, interface, path="/")