diff --git a/instructor/cli/cli.py b/instructor/cli/cli.py
index bbccb04d6..c3b8af56e 100644
--- a/instructor/cli/cli.py
+++ b/instructor/cli/cli.py
@@ -13,7 +13,7 @@
 
 
 @app.command()
-def docs(query: str = typer.Argument(None, help="Search the documentation")):
+def docs(query: str = typer.Argument(None, help="Search the documentation")) -> None:
     """
     Open the instructor documentation website.
     """