diff --git a/src/openllm/cli.py b/src/openllm/cli.py
index 41c96a69..5fb88558 100644
--- a/src/openllm/cli.py
+++ b/src/openllm/cli.py
@@ -2498,7 +2498,7 @@ def load_notebook_metadata() -> DictStrAny:
 
 
 @cli.command()
-@click.argument("output-dir", default=".")
+@click.argument("output-dir", default=None, required=False)
 @click.option(
     "--port",
     envvar="JUPYTER_PORT",