public function getVersion()
    {
        /** @var Response $response */
        $response = $this->get('version', $this->getGuzzleOptions());
        $version = 0.0;

        // Parse output
        if ($response->getStatusCode() == 200
            && preg_match('/Apache Tika (?<version>[\.\d]+)/', $response->getBody(), $matches)
        ) {
            $version = (float)$matches['version'];
        }

        return $version;
    }