pg_tileserv database connection string specify port

I am trying to connect a DB to pg_tileserv following these directions https://github.com/CrunchyData/pg_tileserv/blob/master/README.md

it says after download for windows:

SET DATABASE_URL=postgresql://username:password@host/dbname
pg_tileserv.exe

but there seems to be no option to pass in the port. I have to connect to another port that is not 5432

postgresql://username:password@host:port/dbname