diff --git a/src/Module/Catalog/Domain/Entity/CategoryType.php b/src/Module/Catalog/Domain/Entity/CategoryType.php
index 797fd65..83aa826 100644
--- a/src/Module/Catalog/Domain/Entity/CategoryType.php
+++ b/src/Module/Catalog/Domain/Entity/CategoryType.php
@@ -29,6 +29,9 @@ use Symfony\Component\Serializer\Attribute\Groups;
         new GetCollection(
             security: "is_granted('catalog.categories.view')",
             normalizationContext: ['groups' => ['category_type:read']],
+            // Tri par defaut requis par la spec M0 § 4.6 : ordre alphabetique
+            // stable pour alimenter le <MalioSelect> du formulaire Category.
+            order: ['label' => 'ASC'],
         ),
         new Get(
             security: "is_granted('catalog.categories.view')",