Docker Error bind: address already in use

When I run `docker-compose up` in my Docker project it fails with the following message: > Error starting userland proxy: listen tcp 0.0.0.0:3000: bind: address already in use netstat -pna | grep 3000 shows this: tcp 0 0 0.0.0.0:3000 0.0.0.0:* LISTEN - I've already tried `docker-compose down`, but it doesn't help.