title: Trouble updating from Symfony 2.3 to 2.4
body: <p>Hello I have a really serious and not logic trouble. I am trying to update my project from Symfony2.3 to the version 2.4, but after at the moment that I run the composer update is everything ok, but like the project is with more people and is on a SVN server when someone more download the project this doesnt work and at the moment that he ran composer update, this back to 2.3.*;</p>
  
  <p>here is my composer.json:</p>
  
  <pre><code>{
  "name": "symfony/framework-standard-edition",
  "license": "MIT",
  "type": "project",
  "description": "The \"Symfony Standard Edition\" distribution",
  "autoload": {
      "psr-0": {"": "src/"}
  },
  "require": {
      "php": "&gt;=5.3.3",
      "symfony/symfony": "2.4.*",
      "doctrine/orm": "&gt;=2.2.3,&lt;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",
      "cedriclombardot/admingenerator-generator-bundle": "2.3.*@dev",
      "propel/propel-bundle": "1.2.*",
      "educoder/pest": "1.0.0",
      "friendsofsymfony/rest-bundle": "0.12.0",
      "jms/serializer-bundle": "dev-master",
      "jms/di-extra-bundle": "dev-master",
      "phpexcel/phpexcel": "1.7.*",
      "laurentbrieu/tcpdf": "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",
      "component-dir": "web/components"
  
  },
  "minimum-stability": "dev",
  "extra": {
      "symfony-app-dir": "app",
      "symfony-web-dir": "web",
      "incenteev-parameters": {
          "file": "app/config/parameters.yml"
      },
      "branch-alias": {
          "dev-master": "2.3-dev"
      }
  }
  }
  </code></pre>