Just Married, will be filing jointly, what do we do about W-4s?

My husband and I just got married and want to update our W-4s once our name change is final in a few weeks. I make less than him (about 38% / 62%) so we've chosen to not update his W-4 other than to "married" instead of "single". What changes should be made to my W-4 to help ensure we won't have to pay taxes when we file? We've both always had our W-4s set to "single" and "0" for allowances. Thank you!