Stoicism, caught between determinism & free will

Stoics say some things are “up to us” while other sare not & that it’s crucially important to distinguish correctly between these. The problem, however, is that Stoicism (through the the writings of Zeno & Chrysippus) endorses determinism — the view that our actions and choices are necessitated by factors beyond our control. So, strictly speaking, nothing is up to us. 

It's why most focus heavily on Epictetus, a Stoic of the later Roman period, who taught that the human faculty of judgment is completely free. This, however “updates” Stoicism into something it never was.