Changing sleeping routine

Hello mamas! My daughter is 6 months old and sleeps 10 hours per night with a feed (breast feeding). The problem is that she falls asleep too late! Around 2-3 am is her sleep time until 12-13 pm. We tried to don't let her sleep after 9pm but it doesn't work... Does anyone know how to change this habit? We wish that she falls asleep around 11 pm max midnight. Thanks ?