Diapers overnight

A

My babe sleeps mostly through the night so we don't change her overnight if she's just wet. She is in size 2 diapers during the day and we size up to a 3 overnight. However, she's started peeing through those. I'm wondering if it would be best to purchase size 3 overnight diapers or see if we can size up again to size 4? I'm not sure if overnight diapers are worth it. Any advice? Thanks mamas!