Don't kill process when browser disconnects?

/usr/bin/ttyd -P 19 -p 7682 -W /usr/local/bin/direlog.sh

This command works great! however, when the browser disconnects the direlog.sh command is killed with SIGHUP. Is there a way to prevent this? I'd like ttyd to start the command and let it run forever regardless if there is a browser connected.

curiously, -craig