Baby keeps rolling on side and popping his arms out. What should I do?

Kelsey

Hi there! I'm a new mom to a 4 day old little boy. Every time I put him down in his crib he tries to roll on to one side. And if he doesn't do that he pops his arms out of his swaddle. We tried a sleep sack but he still managed to get a hand out. Is this normal? Should I let him do it? I feel like we are adjusting him every 10 seconds.