rolling at night

Jessica
Hi everyone! So my little guy is 3 months old and has mastered rolling from his tummy to his back and his back to his belly. He usually sleeps anywhere between 7-10 hours at night. But the last two nights he's found it amusing to roll over and then wake up. I'm glad he's proud of himself and wants to show off his new talent lol but not at 3am. Anyone have suggestions as to how to keep him on his back? Thanks in advance!