def format_universe_repo_content_type(universe_version):
    """ Formats a universe repo content-type of version `universe-version`

    :param universe_version: Universe content type version: "v3" or "v4"
    :type universe_version: str
    :return: content-type of the universe repo version `universe_version`
    :rtype: str
    """
    content_type = "application/" \
                   "vnd.dcos.universe.repo+json;" \
                   "charset=utf-8;version=" \
                   + universe_version
    return content_type