diff --git a/src/textual_dev/cli.py b/src/textual_dev/cli.py
index a761d98..e67d484 100644
--- a/src/textual_dev/cli.py
+++ b/src/textual_dev/cli.py
@@ -226,17 +226,25 @@ def _run_app(
     else:
         run_app(import_name, args, environment)
 
+
 @run.command("serve")
 @click.argument("command")
 @click.option("-h", "--host", type=str, default="localhost", help="Host to serve on")
 @click.option("-p", "--port", type=int, default=8000, help="Port of server")
-@click.option("-t", "--title", type=str, default="Textual App", help="Name of the app being served")
+@click.option(
+    "-t",
+    "--title",
+    type=str,
+    default="Textual App",
+    help="Name of the app being served",
+)
 @click.option("-u", "--url", type=str, default=None, help="Public URL")
 @click.option("--dev", type=bool, default=False, is_flag=True, help="Enable debug mode")
-
-def serve(command:str, host:str, port:int, title:str, url:str | None, dev:bool) -> None:
+def serve(
+    command: str, host: str, port: int, title: str, url: str | None, dev: bool
+) -> None:
     """Run a local web server to serve the application.
-    
+
     The command to run should be appended to "textual serve", and should include any python invocation.
 
         textual serve "python -m textual"
@@ -244,12 +252,12 @@ def serve(command:str, host:str, port:int, title:str, url:str | None, dev:bool)
     You may also want to add the `--dev` switch, which will enable textual devtools.
 
         textual serve --dev "python -m textual"
-    
-    
+
+
     """
     from textual_serve.server import Server
-    
-    server = Server(command, host, port, title=title,  public_url=url)
+
+    server = Server(command, host, port, title=title, public_url=url)
     server.serve(debug=dev)