public function updateSpecifications($specifications, array $options = [])
    {
        $data = [
            'body' => [
                $this->index => [
                    $this->collection => $specifications
                ]
            ]
        ];

        $response = $this->kuzzle->query(
            $this->buildQueryArgs('collection', 'updateSpecifications'),
            $this->kuzzle->addHeaders($data, $this->headers),
            $options
        );

        return $response['result'];
    }