In this paper we discuss an often-neglected topic in the literature on the ethics of voting. Our aim is to provide an account of what states are obligated to do, so that voters may fulfil their role as public decision-makers in an epistemically competent manner. We argue that the state ought to provide voters with what we call a substantive opportunity for competence. This entails that the state ought to actively foster the epistemic capabilities that are necessary to achieve competent participation in political decision-making practices.