Baby keeps peeing through diaper while asleep

My 8 month old keeps peeing through his diaper while asleep I’ve tried waking him up and changing him throughout the night but it’s like it throws him off and he can’t go back to sleep plus he still pees through the new diaper I put on him I’ve tried overnight and Ive tried adding extra padding to his diaper I don’t know what else to do 🤦🏻‍♀️