Composer się rzuca -> http://wklej.org/id/1212506/
Jeśli usunę "sonata-project/user-bundle": "dev-master" to wtedy composer update działa poprawnie.
Poniżej mój composer.json
{ "name": "symfony/framework-standard-edition", "license": "MIT", "type": "project", "description": "The \"Symfony Standard Edition\" distribution", "autoload": { "psr-0": { "": "src/" } }, "require": { "php": ">=5.3.3", "symfony/symfony": "2.3.*", "doctrine/orm": ">=2.2.3,<2.4-dev", "doctrine/doctrine-bundle": "1.2.*", "twig/extensions": "1.0.*", "symfony/assetic-bundle": "2.3.*", "symfony/swiftmailer-bundle": "2.3.*", "symfony/monolog-bundle": "2.3.*", "sensio/distribution-bundle": "2.3.*", "sensio/framework-extra-bundle": "2.3.*", "sensio/generator-bundle": "2.3.*", "incenteev/composer-parameter-handler": "~2.0", "friendsofsymfony/user-bundle": "~2.0@dev", "doctrine/migrations": "dev-master", "doctrine/doctrine-migrations-bundle": "dev-master", "knplabs/knp-menu-bundle" : "1.1.*", "sonata-project/block-bundle" : "dev-master", "sonata-project/exporter" : "1.3.3", "sonata-project/jquery-bundle" : "1.8.*", "sonata-project/cache-bundle" : "dev-master", "sonata-project/intl-bundle" : "dev-master", "sonata-project/admin-bundle" : "dev-master", "sonata-project/doctrine-orm-admin-bundle" : "dev-master", "sonata-project/easy-extends-bundle": "dev-master", "sonata-project/seo-bundle": "dev-master", "sonata-project/user-bundle": "dev-master" }, "scripts": { "post-install-cmd": [ "Incenteev\\ParameterHandler\\ScriptHandler::buildParameters", "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap", "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache", "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets", "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile" ], "post-update-cmd": [ "Incenteev\\ParameterHandler\\ScriptHandler::buildParameters", "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap", "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache", "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets", "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile" ] }, "config": { "bin-dir": "bin" }, "minimum-stability": "stable", "extra": { "symfony-app-dir": "app", "symfony-web-dir": "web", "incenteev-parameters": { "file": "app/config/parameters.yml" }, "branch-alias": { "dev-master": "2.3-dev" } } }