Since its just the ribbing you can move the stitches around to make the counts correct. Just make sure that you stay within the ribbing pattern. Just slip the stitches from one needle to the other.
IF you do any decreases at this time your counts will be off and therefore the whole sock will be off. You will have to create more stitches to compensate for the ones you took away. When you create stitches you run into the possibility of holes. Silvers class sock doesn't have any holes.