Play 1.x Change the http.port value in the conf/application.conf file or pass it command line: play run --http.port=8080 Play 2.x - Dev Mode For browser-reload mode: play "run 8080" For continuous-reload mode: play "~run 8080" Play 2.x - Prod Mode Start in Prod mode: play "start -Dhttp.port=8080" Play 2.x - Staged Distribution Create a staged distribution: play stage