diff --git a/src/Bundle/ChillMainBundle/Controller/ExportController.php b/src/Bundle/ChillMainBundle/Controller/ExportController.php
index 190d5f1bf..d318fcc58 100644
--- a/src/Bundle/ChillMainBundle/Controller/ExportController.php
+++ b/src/Bundle/ChillMainBundle/Controller/ExportController.php
@@ -304,7 +304,7 @@ class ExportController extends AbstractController
                 FormType::class,
                 $defaultFormData,
                 [
-                    'method' => $isGenerate ? 'GET' : 'POST',
+                    'method' => $isGenerate ? Request::METHOD_GET : Request::METHOD_POST,
                     'csrf_protection' => !$isGenerate,
                 ]
             );
@@ -352,7 +352,7 @@ class ExportController extends AbstractController
 
         $form = $this->createCreateFormExport($alias, 'export', $data, $savedExport);
 
-        if ('POST' === $request->getMethod()) {
+        if (Request::METHOD_POST === $request->getMethod()) {
             $form->handleRequest($request);
 
             if ($form->isValid()) {
@@ -406,7 +406,7 @@ class ExportController extends AbstractController
 
         $form = $this->createCreateFormExport($alias, 'formatter', $data, $savedExport);
 
-        if ('POST' === $request->getMethod()) {
+        if (Request::METHOD_POST === $request->getMethod()) {
             $form->handleRequest($request);
 
             if ($form->isValid()) {
@@ -536,7 +536,7 @@ class ExportController extends AbstractController
 
         $form = $this->createCreateFormExport($alias, 'centers', [], $savedExport);
 
-        if ('POST' === $request->getMethod()) {
+        if (Request::METHOD_POST === $request->getMethod()) {
             $form->handleRequest($request);
 
             if ($form->isValid()) {