# Configuring the WSGI server with a Procfile on Elastic Beanstalk
<a name="python-configuration-procfile"></a>

You can add a [`Procfile`](platforms-linux-extend.build-proc.md#platforms-linux-extend.proc) to your source bundle to specify and configure the WSGI server for your application. You can specify custom start and run commands in the `Procfile`.

When you use a `Procfile`, it overrides `aws:elasticbeanstalk:container:python` namespace options that you set using configuration files.

The following example uses a `Procfile` to specify uWSGI as the server and configure it.

**Example Procfile**  

```
web: uwsgi --http :8000 --wsgi-file application.py --master --processes 4 --threads 2
```

The following example uses a `Procfile` to configure Gunicorn, the default WSGI server.

**Example Procfile**  

```
web: gunicorn --bind :8000 --workers 3 --threads 2 project.wsgi:application
```

**Notes**  
If you configure any WSGI server other than Gunicorn, be sure to also specify it as a dependency of your application, so that it is installed on your environment instances. For details about dependency specification, see [Specifying dependencies using a requirements file on Elastic Beanstalk](python-configuration-requirements.md).
The default port for the WSGI server is 8000. If you specify a different port number in your `Procfile` command, set the `PORT` [environment property](environments-cfg-softwaresettings.md) to this port number too.