Can you change life totals?

Hi,
I was just wondering if you could change the life totals of the players. 20 life just feels too short and in a few short turns one of us has died before we have time to play our really fun cards. Is there any way we can make the total life of each player higher so we can play for longer?
Thank you
I was just wondering if you could change the life totals of the players. 20 life just feels too short and in a few short turns one of us has died before we have time to play our really fun cards. Is there any way we can make the total life of each player higher so we can play for longer?
Thank you