我安装完laravel后要安装一个laravelcollective/remote，为什么要把所有的都update

我已经安装完laravel了，只是需要安装一个laravelcollective/remote, 使用composer：

[vagrant@localhost masterdev]$ composer update laravelcollective/remote --no-dev -vvv

Reading ./composer.json

Loading config file /home/vagrant/.composer/config.json

Loading config file /home/vagrant/.composer/auth.json

Loading config file ./composer.json

Executing command (CWD): git describe --exact-match --tags

Executing command (CWD): git branch --no-color --no-abbrev -v

Failed to initialize global composer: Composer could not find the config file: /home/vagrant/.composer/composer.json

To initialize a project, please create a composer.json file as described in the http://getcomposer.org/ "Getting Started" section

Loading composer repositories with package information

Downloading http://pkg.phpcomposer.com/repo/packagist/packages.json

Writing /home/vagrant/.composer/cache/repo/http---pkg.phpcomposer.com-repo-packagist/packages.json into cache

Updating dependencies

Reading ./composer.lock

Downloading http://pkg.phpcomposer.com/repo/packagist/p/jakub-onderka/php-console-color.json

Downloading http://pkg.phpcomposer.com/repo/packagist/p/vlucas/phpdotenv.json

Downloading http://pkg.phpcomposer.com/repo/packagist/p/symfony/var-dumper.json

Downloading http://pkg.phpcomposer.com/repo/packagist/p/symfony/translation.json

Downloading http://pkg.phpcomposer.com/repo/packagist/p/symfony/translation.json

Downloading http://pkg.phpcomposer.com/repo/packagist/p/symfony/translation.json

Downloading http://pkg.phpcomposer.com/repo/packagist/p/symfony/security-core.json

Downloading http://pkg.phpcomposer.com/repo/packagist/p/symfony/routing.json

Downloading http://pkg.phpcomposer.com/repo/packagist/p/symfony/process.json

Downloading http://pkg.phpcomposer.com/repo/packagist/p/symfony/http-foundation.json

Downloading http://pkg.phpcomposer.com/repo/packagist/p/symfony/event-dispatcher.json

Downloading http://pkg.phpcomposer.com/repo/packagist/p/psr/log.json

。。。

我看到它又去下载了一套这个，是为什么？有没有只下载对应package而不需要update所有的办法？