humidity levels

i have a mbking and currently he is in a 10 gal with aspen grass. my question is that i havent been able to get the humidity lower than 63, and from my reading it needs to be 60 tops, will this slightly higher humidity cause any trouble for the health of the snake?

That should be fine.. you just want to make sure it's not actually moist in there, then bacteria and other icky things could start growing in the substrate. You could try downsizing the water bowl, or moving it far from the heat source to try to lower the humidity.