diff --git a/src/Resources/views/CRUD/Association/edit_many_script.html.twig b/src/Resources/views/CRUD/Association/edit_many_script.html.twig
index b6d354dd37..c6c709c169 100644
--- a/src/Resources/views/CRUD/Association/edit_many_script.html.twig
+++ b/src/Resources/views/CRUD/Association/edit_many_script.html.twig
@@ -279,6 +279,9 @@ This code manages the many-to-[one|many] association field popup
         jQuery(form).ajaxSubmit({
             url: url,
             type: type,
+            headers: {
+                Accept: 'application/json'
+            },
             data: data,
             success: function(data) {
                 Admin.log('[{{ id }}|field_dialog_form_action] ajax success');