After brexit the shilling was under pressure , the cbk spent $280m to defend the shilling and there was little movement. The reason being kenya has accumulated more than $7b in foreign currency reserve. Mind you kenya still has $1.5b in stand by loan from IMF incase of any external shock that it hasn't even accessed. So unless price of oil shoots up to $100 kenya I don't think is going to default or its currency isn't going to depreciate significantly.