Getting baby to nap in her crib??

My daughter is 4 months old. She sleeps in her crib at night for 12 hours. We've never had an issue getting her to sleep in there. Naps on the other hand just dont work out. Ill do the whole night time roughtine and she still wont nap in her crib. What can i do? Shes getting to the point where she doesnt want to nap in her bouncer either. Sooo tired but refuses to nap anywhere. Ive stuck to a nap schedule with her(her naps are on point anyway) any advice would be appreciated