public function needsReload()
    {
        if ($this->reload) {
            return true;
        }

        // will reload tld list if timestamp of cache file is outdated
        if (time() - $this->tldList['timestamp'] > $this->cacheTime) {
            return true;
        }

        // will reload tld list if changes to Additional.php have been made
        if ($this->tldList['timestamp'] < filemtime(__DIR__ .'/Additional.php')) {
            return true;
        }

        return false;
    }