Still taking 5 naps

Please help. I see all these posts about 3 naps and 2+ hour wake times. My 5 month old still has 5 naps a day. He has a 90 minute wake window (gets fussy and yawning) and then naps for 30 or 35 minutes. What should I do? Should I be trying to fight through the fussiness and keep him awake longer in hopes that he will nap longer and go down to 4 naps a day? Won't he get too overtired? He goes down for his naps so nicely though. I'm confused 😭

Edit: to add he still wakes up 3 - 4 times a night too