diff --git a/lib/Alchemy/Phrasea/Application/Lightbox.php b/lib/Alchemy/Phrasea/Application/Lightbox.php
index 0c492f79df..747dc5530b 100644
--- a/lib/Alchemy/Phrasea/Application/Lightbox.php
+++ b/lib/Alchemy/Phrasea/Application/Lightbox.php
@@ -125,7 +125,7 @@ return call_user_func(
                         $ret['note_html'] = $twig->render($template_note, array('basket_element' => $BasketElement));
                         $ret['caption'] = $twig->render($template_caption, array('view'   => 'preview', 'record' => $BasketElement->getRecord()));
 
-                        return $app->json($app['phraseanet.core']['Serializer']->serialize($ret, 'json'));
+                        return $app->json($ret);
                     }
                 }
             )->assert('sselcont_id', '\d+');
@@ -166,7 +166,7 @@ return call_user_func(
 
                         $ret['agreement_html'] = $ret['selector_html'] = $ret['note_html'] = '';
 
-                        return $app->json($app['phraseanet.core']['Serializer']->serialize($ret, 'json'));
+                        return $app->json($ret);
                     }
                 }
             )->assert('entry_id', '\d+')->assert('item_id', '\d+');
@@ -377,7 +377,7 @@ return call_user_func(
                         $output = array('error' => false, 'datas' => $datas);
                     }
 
-                    return $app->json($app['phraseanet.core']['Serializer']->serialize($output, 'json'));
+                    return $app->json($output);
                 }
             )->assert('sselcont_id', '\d+');
 
@@ -441,7 +441,7 @@ return call_user_func(
                         $ret['datas'] = $e->getMessage();
                     }
 
-                    return $app->json($app['phraseanet.core']['Serializer']->serialize($ret, 'json'));
+                    return $app->json($ret);
                 }
             )->assert('sselcont_id', '\d+');
 
@@ -506,10 +506,7 @@ return call_user_func(
                         $datas = array('error' => true, 'datas' => $e->getMessage());
                     }
 
-                    $response = new Response($app['phraseanet.core']['Serializer']->serialize($datas, 'json'));
-                    $response->setCharset('UTF-8');
-
-                    return $response;
+                    return $app->json($datas);
                 }
             )->assert('ssel_id', '\d+');
 
diff --git a/lib/Alchemy/Phrasea/Application/Prod.php b/lib/Alchemy/Phrasea/Application/Prod.php
index a71607381b..6a8eb2b28e 100644
--- a/lib/Alchemy/Phrasea/Application/Prod.php
+++ b/lib/Alchemy/Phrasea/Application/Prod.php
@@ -74,7 +74,7 @@ return call_user_func(function() {
                             , 'message' => $e->getMessage()
                         );
 
-                        return $app->json($app['phraseanet.core']['Serializer']->serialize($datas, 'json'));
+                        return $app->json($datas);
                     }
                     if ($e instanceof \Exception_BadRequest) {
                         return new Response('Bad Request', 400);
diff --git a/lib/Alchemy/Phrasea/Controller/Admin/Fields.php b/lib/Alchemy/Phrasea/Controller/Admin/Fields.php
index afaef149af..a3c88ae1c9 100644
--- a/lib/Alchemy/Phrasea/Controller/Admin/Fields.php
+++ b/lib/Alchemy/Phrasea/Controller/Admin/Fields.php
@@ -39,7 +39,7 @@ class Fields implements ControllerProviderInterface
                     'is_multi' => $tag->isMulti(),
                 );
 
-                return $app->json($app['phraseanet.core']['Serializer']->serialize($datas, 'json'));
+                return $app->json($datas);
             });
 
         $controllers->get('/checkreadonly/', function(PhraseaApplication $app, Request $request) {
@@ -52,7 +52,7 @@ class Fields implements ControllerProviderInterface
                     'is_readonly' => ! $tag->isWritable(),
                 );
 
-                return $app->json($app['phraseanet.core']['Serializer']->serialize($datas, 'json'));
+                return $app->json($datas);
             });
 
         return $controllers;
diff --git a/lib/Alchemy/Phrasea/Controller/Setup/Upgrader.php b/lib/Alchemy/Phrasea/Controller/Setup/Upgrader.php
index aa8ad53514..9a9f832175 100644
--- a/lib/Alchemy/Phrasea/Controller/Setup/Upgrader.php
+++ b/lib/Alchemy/Phrasea/Controller/Setup/Upgrader.php
@@ -46,9 +46,7 @@ class Upgrader implements ControllerProviderInterface
         $controllers->get('/status/', function() use ($app) {
                 require_once __DIR__ . '/../../../../bootstrap.php';
 
-                $datas = \Setup_Upgrade::get_status();
-
-                return $app->json($app['phraseanet.core']['Serializer']->serialize($datas, 'json'));
+                return $app->json(\Setup_Upgrade::get_status());
             });
 
         $controllers->post('/execute/', function() use ($app) {
diff --git a/lib/Alchemy/Phrasea/Controller/Utils/ConnectionTest.php b/lib/Alchemy/Phrasea/Controller/Utils/ConnectionTest.php
index dbd11c3c97..d8deb11d3c 100644
--- a/lib/Alchemy/Phrasea/Controller/Utils/ConnectionTest.php
+++ b/lib/Alchemy/Phrasea/Controller/Utils/ConnectionTest.php
@@ -80,7 +80,7 @@ class ConnectionTest implements ControllerProviderInterface
                     , 'is_databox' => $is_databox
                 );
 
-                return $app->json($app['phraseanet.core']['Serializer']->serialize($datas, 'json'));
+                return $app->json($datas);
             });
 
         return $controllers;
diff --git a/lib/Alchemy/Phrasea/Controller/Utils/PathFileTest.php b/lib/Alchemy/Phrasea/Controller/Utils/PathFileTest.php
index e754b09dff..8777f23441 100644
--- a/lib/Alchemy/Phrasea/Controller/Utils/PathFileTest.php
+++ b/lib/Alchemy/Phrasea/Controller/Utils/PathFileTest.php
@@ -30,30 +30,20 @@ class PathFileTest implements ControllerProviderInterface
         $controllers->get('/path/', function( Request $request) {
                 $path = $request->get('path');
 
-                return $app->json(
-                        $app['phraseanet.core']['Serializer']->serialize(
-                            array(
-                            'exists'     => file_exists($path)
-                            , 'file'       => is_file($path)
-                            , 'dir'        => is_dir($path)
-                            , 'readable'   => is_readable($path)
-                            , 'writeable'  => is_writable($path)
-                            , 'executable' => is_executable($path)
-                            )
-                            , 'json'
-                        )
-                );
+                return $app->json(array(
+                        'exists'     => file_exists($path)
+                        , 'file'       => is_file($path)
+                        , 'dir'        => is_dir($path)
+                        , 'readable'   => is_readable($path)
+                        , 'writeable'  => is_writable($path)
+                        , 'executable' => is_executable($path)
+                    ));
             });
 
         $controllers->get('/url/', function( Request $request) {
                 $url = $request->get('url');
 
-                return $app->json(
-                        $app['phraseanet.core']['Serializer']->serialize(
-                            array('code' => \http_query::getHttpCodeFromUrl($url))
-                            , 'json'
-                        )
-                );
+                return $app->json(array('code' => \http_query::getHttpCodeFromUrl($url)));
             });
 
         return $controllers;
diff --git a/tests/Alchemy/Phrasea/Application/LightboxTest.php b/tests/Alchemy/Phrasea/Application/LightboxTest.php
index 10127bba33..5a39881368 100644
--- a/tests/Alchemy/Phrasea/Application/LightboxTest.php
+++ b/tests/Alchemy/Phrasea/Application/LightboxTest.php
@@ -34,10 +34,10 @@ class ApplicationLightboxTest extends PhraseanetWebTestCaseAuthenticatedAbstract
     public function createApplication()
     {
         $app = require __DIR__ . '/../../../../lib/Alchemy/Phrasea/Application/Lightbox.php';
-        
+
         $app['debug'] = true;
         unset($app['exception_handler']);
-        
+
         return $app;
     }
 
diff --git a/tests/Alchemy/Phrasea/Controller/Prod/LazaretTest.php b/tests/Alchemy/Phrasea/Controller/Prod/LazaretTest.php
index babcfb55eb..f941550774 100644
--- a/tests/Alchemy/Phrasea/Controller/Prod/LazaretTest.php
+++ b/tests/Alchemy/Phrasea/Controller/Prod/LazaretTest.php
@@ -28,7 +28,7 @@ class LazaretTest extends \PhraseanetWebTestCaseAuthenticatedAbstract
         $app['debug'] = true;
         unset($app['exception_handler']);
 
-        $app['Core']['file-system'] = $this->getMock('Symfony\Component\Filesystem\Filesystem', array('remove'));
+        $app['phraseanet.core']['file-system'] = $this->getMock('Symfony\Component\Filesystem\Filesystem', array('remove'));
 
         return $app;
     }
diff --git a/tests/Alchemy/Phrasea/Controller/Setup/FakeSetupApplication.inc b/tests/Alchemy/Phrasea/Controller/Setup/FakeSetupApplication.inc
index af952c1707..043c343c28 100644
--- a/tests/Alchemy/Phrasea/Controller/Setup/FakeSetupApplication.inc
+++ b/tests/Alchemy/Phrasea/Controller/Setup/FakeSetupApplication.inc
@@ -10,7 +10,7 @@ use Alchemy\Phrasea\Controller\Utils as ControllerUtils;
 return call_user_func(function() {
             $app = new \Silex\Application();
 
-            $app['Core'] = \bootstrap::getCore();
+            $app['phraseanet.core'] = \bootstrap::getCore();
 
             $app['install'] = true;
 
diff --git a/tests/Alchemy/Phrasea/Controller/Setup/FakeUpgradeApplication.inc b/tests/Alchemy/Phrasea/Controller/Setup/FakeUpgradeApplication.inc
index fb6971dbdb..4dce173707 100644
--- a/tests/Alchemy/Phrasea/Controller/Setup/FakeUpgradeApplication.inc
+++ b/tests/Alchemy/Phrasea/Controller/Setup/FakeUpgradeApplication.inc
@@ -2,15 +2,13 @@
 
 namespace Alchemy\Phrasea\Application;
 
-use Symfony\Component\HttpFoundation\Response;
-use Symfony\Component\HttpFoundation\Request;
 use Alchemy\Phrasea\Controller\Setup as Controller;
 use Alchemy\Phrasea\Controller\Utils as ControllerUtils;
 
 return call_user_func(function() {
             $app = new \Silex\Application();
 
-            $app['Core'] = \bootstrap::getCore();
+            $app['phraseanet.core'] = \bootstrap::getCore();
 
             $app['upgrade'] = true;