diff --git a/docker/dev/nginx_proxy.conf b/docker/dev/nginx_proxy.conf
new file mode 100644
index 00000000000..d8b6f7c1729
--- /dev/null
+++ b/docker/dev/nginx_proxy.conf
@@ -0,0 +1,6 @@
+client_max_body_size 100M;
+
+proxy_connect_timeout 6003;
+proxy_send_timeout 3600;
+proxy_read_timeout 3600;
+send_timeout 3600;
diff --git a/docker/php/conf.d/default.ini b/docker/php/conf.d/default.ini
index 6ee3dd07d42..e177e7f3ec2 100644
--- a/docker/php/conf.d/default.ini
+++ b/docker/php/conf.d/default.ini
@@ -6,3 +6,5 @@ apc.enable_cli = On
 session.use_strict_mode = 1
 zend.detect_unicode = 0
 intl.default_locale = fr
+upload_max_filesize = 15M
+post_max_size = 20M
diff --git a/src/Controller/Api/FormationUploadFileController.php b/src/Controller/Api/FormationUploadFileController.php
index 3c6ab77d464..ef695446d8e 100644
--- a/src/Controller/Api/FormationUploadFileController.php
+++ b/src/Controller/Api/FormationUploadFileController.php
@@ -4,24 +4,40 @@
 
 use App\Entity\AdherentFormation\Formation;
 use App\Formation\FormationHandler;
+use Doctrine\ORM\EntityManagerInterface;
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
 use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
+use Symfony\Component\Validator\Constraints\File;
+use Symfony\Component\Validator\Validator\ValidatorInterface;
 
 class FormationUploadFileController extends AbstractController
 {
-    public function __invoke(Request $request, Formation $formation, FormationHandler $formationHandler): Formation
-    {
+    public function __invoke(
+        EntityManagerInterface $entityManager,
+        ValidatorInterface $validator,
+        Request $request,
+        Formation $formation,
+        FormationHandler $formationHandler,
+    ): Response {
         $uploadedFile = $request->files->get('file');
 
         if (!$uploadedFile) {
             throw new BadRequestHttpException('Key "file" is required');
         }
 
+        $errors = $validator->validate($uploadedFile, [new File(maxSize: '10M')]);
+
+        if ($errors->count()) {
+            return $this->json($errors, 400);
+        }
+
         $formation->setFile($uploadedFile);
 
         $formationHandler->handleFile($formation);
+        $entityManager->flush();
 
-        return $formation;
+        return $this->json('OK');
     }
 }
diff --git a/src/DataFixtures/ORM/LoadAdherentFormationData.php b/src/DataFixtures/ORM/LoadAdherentFormationData.php
index e630083018f..9789cb9946a 100644
--- a/src/DataFixtures/ORM/LoadAdherentFormationData.php
+++ b/src/DataFixtures/ORM/LoadAdherentFormationData.php
@@ -144,7 +144,7 @@ private function createFile(Formation $formation): void
         $this->formationHandler->handleFile($formation);
     }
 
-    public function getDependencies()
+    public function getDependencies(): array
     {
         return [
             LoadAdminData::class,