Yes there is a very small chance that you would need to update it, and to update it, you would need a first run Haswell cpu like any of the i5s I mentioned above or an i3 4130, 4330, i5 4670, i5 4670k, i7 4770, i7 4770k, or the "s" version of any of those.
If you are in the US buying from a major online retailer, I would say there would be a 0% chance.