How can you get your baby to sleep for longer intervals at night?

Ebev
Hello ladies! 
My two week old has been a breast feeding champ! Only thing is, he started his nights getting up every three hours. Now he is up at least every two hours. Since it takes AT LEAST 45 minutes to feed, change, and put him back to bed, I am only getting like an hour of sleep at s time. Any advice about how to get him to sleep a little bit longer??
Thanks!!