Rolling keeps him from sleeping

My baby is 19 weeks old and just learned to roll from back to belly and does it CONSTANTLY. He has rolled from belly to back but only a couple of time whereas back to belly he’s a pro.

As I am so excited for his milestones this particular one is making it harder and harder to lay him down for naps and bedtime because all he stays doing is rolling.

Any suggestions on how to keep my roller still during naps and bedtime?