diff --git a/lib/Alchemy/Phrasea/Command/Plugin/AddPlugin.php b/lib/Alchemy/Phrasea/Command/Plugin/AddPlugin.php
index cd223e22b0..b3da2e4604 100644
--- a/lib/Alchemy/Phrasea/Command/Plugin/AddPlugin.php
+++ b/lib/Alchemy/Phrasea/Command/Plugin/AddPlugin.php
@@ -58,6 +58,10 @@ class AddPlugin extends AbstractPluginCommand
         $this->container['filesystem']->remove($temporaryDir);
         $output->writeln(" <comment>OK</comment>");
 
+        $output->write("Activating plugin...");
+        $this->container['conf']->set(['plugins', $manifest->getName(), 'enabled'], true);
+        $output->writeln(" <comment>OK</comment>");
+
         $this->updateConfigFiles($input, $output);
 
         return 0;
diff --git a/lib/Alchemy/Phrasea/Command/Plugin/RemovePlugin.php b/lib/Alchemy/Phrasea/Command/Plugin/RemovePlugin.php
index 0c3147f2a8..db089df083 100644
--- a/lib/Alchemy/Phrasea/Command/Plugin/RemovePlugin.php
+++ b/lib/Alchemy/Phrasea/Command/Plugin/RemovePlugin.php
@@ -24,8 +24,7 @@ class RemovePlugin extends AbstractPluginCommand
 
         $this
             ->setDescription('Removes a plugin given its name')
-            ->addArgument('name', InputArgument::REQUIRED, 'The name of the plugin')
-            ->addOption('keep-config', 'k', InputOption::VALUE_NONE, 'Use this flag to keep configuration');
+            ->addArgument('name', InputArgument::REQUIRED, 'The name of the plugin');
     }
 
     protected function doExecutePluginAction(InputInterface $input, OutputInterface $output)
@@ -50,11 +49,7 @@ class RemovePlugin extends AbstractPluginCommand
 
         $this->updateConfigFiles($input, $output);
 
-        if (!$input->getOption('keep-config')) {
-            $conf = $this->container['phraseanet.configuration']->getConfig();
-            unset($conf['plugins'][$name]);
-            $this->container['phraseanet.configuration']->setConfig($conf);
-        }
+        $this->container['conf']->remove(['plugins', $name]);
 
         return 0;
     }
diff --git a/lib/Alchemy/Phrasea/Core/CLIProvider/PluginServiceProvider.php b/lib/Alchemy/Phrasea/Core/CLIProvider/PluginServiceProvider.php
index df9ffb936c..d8c849185c 100644
--- a/lib/Alchemy/Phrasea/Core/CLIProvider/PluginServiceProvider.php
+++ b/lib/Alchemy/Phrasea/Core/CLIProvider/PluginServiceProvider.php
@@ -30,24 +30,6 @@ class PluginServiceProvider implements ServiceProviderInterface
 {
     public function register(Application $app)
     {
-        $app['plugins.schema'] = realpath(__DIR__ . '/../../../../conf.d/plugin-schema.json');
-
-        $app['plugins.manager'] = $app->share(function (Application $app) {
-            return new PluginManager($app['plugins.directory'], $app['plugins.plugins-validator']);
-        });
-
-        $app['plugins.json-validator'] = $app->share(function (Application $app) {
-            return new JsonValidator();
-        });
-
-        $app['plugins.manifest-validator'] = $app->share(function (Application $app) {
-            return ManifestValidator::create($app);
-        });
-
-        $app['plugins.plugins-validator'] = $app->share(function (Application $app) {
-            return new PluginValidator($app['plugins.manifest-validator']);
-        });
-
         $app['plugins.import-strategy'] = $app->share(function (Application $app) {
             return new ImportStrategy();
         });
diff --git a/lib/Alchemy/Phrasea/Core/Provider/PluginServiceProvider.php b/lib/Alchemy/Phrasea/Core/Provider/PluginServiceProvider.php
index 94fc454d5f..1a9d2e7693 100644
--- a/lib/Alchemy/Phrasea/Core/Provider/PluginServiceProvider.php
+++ b/lib/Alchemy/Phrasea/Core/Provider/PluginServiceProvider.php
@@ -11,6 +11,10 @@
 
 namespace Alchemy\Phrasea\Core\Provider;
 
+use Alchemy\Phrasea\Plugin\PluginManager;
+use Alchemy\Phrasea\Plugin\Schema\ManifestValidator;
+use Alchemy\Phrasea\Plugin\Schema\PluginValidator;
+use JsonSchema\Validator as JsonValidator;
 use Silex\Application;
 use Silex\ServiceProviderInterface;
 
@@ -18,6 +22,23 @@ class PluginServiceProvider implements ServiceProviderInterface
 {
     public function register(Application $app)
     {
+        $app['plugins.schema'] = realpath(__DIR__ . '/../../../../conf.d/plugin-schema.json');
+
+        $app['plugins.json-validator'] = $app->share(function (Application $app) {
+            return new JsonValidator();
+        });
+
+        $app['plugins.manifest-validator'] = $app->share(function (Application $app) {
+            return ManifestValidator::create($app);
+        });
+
+        $app['plugins.plugins-validator'] = $app->share(function (Application $app) {
+            return new PluginValidator($app['plugins.manifest-validator']);
+        });
+
+        $app['plugins.manager'] = $app->share(function (Application $app) {
+            return new PluginManager($app['plugins.directory'], $app['plugins.plugins-validator'], $app['conf']);
+        });
     }
 
     public function boot(Application $app)
diff --git a/lib/Alchemy/Phrasea/Plugin/PluginManager.php b/lib/Alchemy/Phrasea/Plugin/PluginManager.php
index f3c014a0f4..4a784c63fc 100644
--- a/lib/Alchemy/Phrasea/Plugin/PluginManager.php
+++ b/lib/Alchemy/Phrasea/Plugin/PluginManager.php
@@ -11,6 +11,7 @@
 
 namespace Alchemy\Phrasea\Plugin;
 
+use Alchemy\Phrasea\Core\Configuration\PropertyAccess;
 use Alchemy\Phrasea\Plugin\Schema\PluginValidator;
 use Alchemy\Phrasea\Plugin\Exception\PluginValidationException;
 use Symfony\Component\Finder\Finder;
@@ -19,11 +20,13 @@ class PluginManager
 {
     private $pluginDir;
     private $validator;
+    private $conf;
 
-    public function __construct($pluginDir, PluginValidator $validator)
+    public function __construct($pluginDir, PluginValidator $validator, PropertyAccess $conf)
     {
         $this->pluginDir = $pluginDir;
         $this->validator = $validator;
+        $this->conf = $conf;
     }
 
     /**
@@ -31,20 +34,13 @@ class PluginManager
      */
     public function listPlugins()
     {
-        $finder = new Finder();
-        $finder
-            ->depth(0)
-            ->in($this->pluginDir)
-            ->directories();
-
         $plugins = [];
 
-        foreach ($finder as $pluginDir) {
+        foreach ($this->conf->get('plugins') as $name => $config) {
             $manifest = $error = null;
-            $name = $pluginDir->getBasename();
 
             try {
-                $manifest = $this->validator->validatePlugin((string) $pluginDir);
+                $manifest = $this->validator->validatePlugin($this->pluginDir.'/'.$name);
             } catch (PluginValidationException $e) {
                 $error = $e;
             }
@@ -57,8 +53,29 @@ class PluginManager
 
     public function hasPlugin($name)
     {
-        $plugins = $this->listPlugins();
+        return array_key_exists($name, $this->conf->get('plugins'));
+    }
 
-        return isset($plugins[$name]);
+    public function enable($name)
+    {
+        $this->conf->set(['plugins', $name, 'enabled'], true);
+
+        return $this;
+    }
+
+    public function disable($name)
+    {
+        $this->conf->set(['plugins', $name, 'enabled'], false);
+
+        return $this;
+    }
+
+    public function isEnabled($name)
+    {
+        if (!$this->hasPlugin($name)) {
+            return false;
+        }
+
+        return $this->conf->get(['plugins', $name, 'enabled'], false);
     }
 }
diff --git a/lib/classes/patch/390alpha12a.php b/lib/classes/patch/390alpha12a.php
new file mode 100644
index 0000000000..6da861fb6d
--- /dev/null
+++ b/lib/classes/patch/390alpha12a.php
@@ -0,0 +1,92 @@
+<?php
+
+/*
+ * This file is part of Phraseanet
+ *
+ * (c) 2005-2014 Alchemy
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+use Alchemy\Phrasea\Application;
+use Alchemy\Phrasea\Plugin\Plugin;
+use Alchemy\Phrasea\Plugin\Exception\PluginValidationException;
+use Symfony\Component\Finder\Finder;
+
+class patch_390alpha12a implements patchInterface
+{
+    /** @var string */
+    private $release = '3.9.0-alpha.12';
+
+    /** @var array */
+    private $concern = [base::APPLICATION_BOX];
+
+    /**
+     * {@inheritdoc}
+     */
+    public function get_release()
+    {
+        return $this->release;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function require_all_upgrades()
+    {
+        return false;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function concern()
+    {
+        return $this->concern;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getDoctrineMigrations()
+    {
+        return [];
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function apply(base $appbox, Application $app)
+    {
+        foreach ($this->listPlugins($app) as $name => $plugin) {
+            $app['conf']->set(['plugins', $name, 'enabled'], true);
+        }
+    }
+
+    private function listPlugins(Application $app)
+    {
+        $finder = new Finder();
+        $finder
+            ->depth(0)
+            ->in($app['plugins.directory'])
+            ->directories();
+
+        $plugins = [];
+
+        foreach ($finder as $pluginDir) {
+            $manifest = $error = null;
+            $name = $pluginDir->getBasename();
+
+            try {
+                $manifest = $app['plugins.plugins-validator']->validatePlugin((string) $pluginDir);
+            } catch (PluginValidationException $e) {
+                $error = $e;
+            }
+
+            $plugins[$name] = new Plugin($name, $manifest, $error);
+        }
+
+        return $plugins;
+    }
+}
diff --git a/tests/Alchemy/Tests/Phrasea/Plugin/PluginManagerTest.php b/tests/Alchemy/Tests/Phrasea/Plugin/PluginManagerTest.php
index 6bbe410a2e..eb36ab2353 100644
--- a/tests/Alchemy/Tests/Phrasea/Plugin/PluginManagerTest.php
+++ b/tests/Alchemy/Tests/Phrasea/Plugin/PluginManagerTest.php
@@ -9,27 +9,41 @@ class PluginManagerTest extends PluginTestCase
 {
     public function testListGoodPlugins()
     {
-        $manager = new PluginManager(__DIR__ . '/Fixtures/PluginDirInstalled', self::$DI['cli']['plugins.plugins-validator']);
+        $prevPlugins = self::$DI['cli']['conf']->get('plugins');
+        self::$DI['cli']['conf']->set('plugins', []);
+        self::$DI['cli']['conf']->set(['plugins', 'test-plugin', 'enabled'], true);
+
+        $manager = new PluginManager(__DIR__ . '/Fixtures/PluginDirInstalled', self::$DI['cli']['plugins.plugins-validator'], self::$DI['cli']['conf']);
         $plugins = $manager->listPlugins();
         $this->assertCount(1, $plugins);
         $plugin = array_pop($plugins);
 
         $this->assertFalse($plugin->isErroneous());
+
+        self::$DI['cli']['conf']->set('plugins', $prevPlugins);
     }
 
     public function testListWrongPlugins()
     {
-        $manager = new PluginManager(__DIR__ . '/Fixtures/WrongPlugins', self::$DI['cli']['plugins.plugins-validator']);
+        $prevPlugins = self::$DI['cli']['conf']->get('plugins');
+        self::$DI['cli']['conf']->set('plugins', []);
+        self::$DI['cli']['conf']->set(['plugins', 'plugin-test', 'enabled'], true);
+        self::$DI['cli']['conf']->set(['plugins', 'plugin-test2', 'enabled'], true);
+        self::$DI['cli']['conf']->set(['plugins', 'plugin-test3', 'enabled'], true);
+
+        $manager = new PluginManager(__DIR__ . '/Fixtures/WrongPlugins', self::$DI['cli']['plugins.plugins-validator'], self::$DI['cli']['conf']);
         $plugins = $manager->listPlugins();
-        $this->assertCount(8, $plugins);
+        $this->assertCount(3, $plugins);
         $plugin = array_pop($plugins);
 
         $this->assertTrue($plugin->isErroneous());
+
+        self::$DI['cli']['conf']->set('plugins', $prevPlugins);
     }
 
     public function testHasPlugin()
     {
-        $manager = new PluginManager(__DIR__ . '/Fixtures/PluginDirInstalled', self::$DI['cli']['plugins.plugins-validator']);
+        $manager = new PluginManager(__DIR__ . '/Fixtures/PluginDirInstalled', self::$DI['cli']['plugins.plugins-validator'], self::$DI['cli']['conf']);
         $this->assertTrue($manager->hasPlugin('test-plugin'));
         $this->assertFalse($manager->hasPlugin('test-plugin2'));
     }