use Mix.Config config :country_data, supported_data: ["countries", "languages", "currencies", "regions"] config :country_data, search_interfaces: [ {"countries", "alpha2"}, {"countries", "alpha3"}, {"countries", "name"}, {"countries", "currencies"}, {"languages", "alpha2"}, {"languages", "alpha3"}, {"languages", "name"}, {"currencies", "code"}, {"currencies", "number"}, {"regions", "name"} ]