diff --git a/src/Composer/Command/RunScriptCommand.php b/src/Composer/Command/RunScriptCommand.php
new file mode 100644
index 000000000..e504ce527
--- /dev/null
+++ b/src/Composer/Command/RunScriptCommand.php
@@ -0,0 +1,63 @@
+<?php
+
+/*
+ * This file is part of Composer.
+ *
+ * (c) Nils Adermann <naderman@naderman.de>
+ *     Jordi Boggiano <j.boggiano@seld.be>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Composer\Command;
+
+use Composer\Script\ScriptEvents;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Output\OutputInterface;
+
+/**
+ * @author Fabien Potencier <fabien.potencier@gmail.com>
+ */
+class RunScriptCommand extends Command
+{
+    protected function configure()
+    {
+        $this
+            ->setName('run-script')
+            ->setDescription('Run the scripts defined in composer.json.')
+            ->setDefinition(array(
+                new InputArgument('script', InputArgument::REQUIRED, 'Script name to run.'),
+                new InputOption('dev', null, InputOption::VALUE_NONE, 'Sets the dev mode.'),
+                new InputOption('no-dev', null, InputOption::VALUE_NONE, 'Disables the dev mode.'),
+            ))
+            ->setHelp(<<<EOT
+The <info>run-script</info> command runs scripts defined in composer.json:
+
+<info>php composer.phar run-script post-update-cmd</info>
+EOT
+            )
+        ;
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output)
+    {
+        $script = $input->getArgument('script');
+        if (!in_array($script, array(
+            ScriptEvents::PRE_INSTALL_CMD,
+            ScriptEvents::POST_INSTALL_CMD,
+            ScriptEvents::PRE_UPDATE_CMD,
+            ScriptEvents::POST_UPDATE_CMD,
+        ))) {
+            if (defined('Composer\Script\ScriptEvents::'.str_replace('-', '_', strtoupper($script)))) {
+                throw new \InvalidArgumentException(sprintf('Script "%s" cannot be run with this command', $script));
+            }
+
+            throw new \InvalidArgumentException(sprintf('Script "%s" does not exist', $script));
+        }
+
+        $this->getComposer()->getEventDispatcher()->dispatchCommandEvent($script, $input->getOption('dev') || !$input->getOption('no-dev'));
+    }
+}
diff --git a/src/Composer/Console/Application.php b/src/Composer/Console/Application.php
index e2ba74a4c..22fc763d9 100755
--- a/src/Composer/Console/Application.php
+++ b/src/Composer/Console/Application.php
@@ -200,6 +200,7 @@ class Application extends BaseApplication
         $commands[] = new Command\StatusCommand();
         $commands[] = new Command\ArchiveCommand();
         $commands[] = new Command\DiagnoseCommand();
+        $commands[] = new Command\RunScriptCommand();
 
         if ('phar:' === substr(__FILE__, 0, 5)) {
             $commands[] = new Command\SelfUpdateCommand();