protected function enableParsedown(Spress $spress)
    {
        $spress->extend('spress.cms.converterManager.converters', function ($predefinedConverters, $c) {
            unset($predefinedConverters['MichelfMarkdownConverter']);

            $markdownExts = $c['spress.config.values']['markdown_ext'];
            $predefinedConverters['ParsedownConverter'] = new ParsedownConverter($markdownExts);

            return $predefinedConverters;
        });
    }