diff --git a/src/Bridge/Doctrine/EventListener/PublishMercureUpdatesListener.php b/src/Bridge/Doctrine/EventListener/PublishMercureUpdatesListener.php
index f3bbb744a94..bd8ad5f156c 100644
--- a/src/Bridge/Doctrine/EventListener/PublishMercureUpdatesListener.php
+++ b/src/Bridge/Doctrine/EventListener/PublishMercureUpdatesListener.php
@@ -47,8 +47,9 @@ final class PublishMercureUpdatesListener
     private $createdEntities;
     private $updatedEntities;
     private $deletedEntities;
+    private $formats;
 
-    public function __construct(ResourceClassResolverInterface $resourceClassResolver, IriConverterInterface $iriConverter, ResourceMetadataFactoryInterface $resourceMetadataFactory, SerializerInterface $serializer, MessageBusInterface $messageBus = null, callable $publisher = null, ExpressionLanguage $expressionLanguage = null)
+    public function __construct(ResourceClassResolverInterface $resourceClassResolver, IriConverterInterface $iriConverter, ResourceMetadataFactoryInterface $resourceMetadataFactory, SerializerInterface $serializer, MessageBusInterface $messageBus = null, callable $publisher = null, array $formats, ExpressionLanguage $expressionLanguage = null)
     {
         if (null === $messageBus && null === $publisher) {
             throw new InvalidArgumentException('A message bus or a publisher must be provided.');
@@ -60,6 +61,7 @@ public function __construct(ResourceClassResolverInterface $resourceClassResolve
         $this->serializer = $serializer;
         $this->messageBus = $messageBus;
         $this->publisher = $publisher;
+        $this->formats = $formats;
         $this->expressionLanguage = $expressionLanguage ?? class_exists(ExpressionLanguage::class) ? new ExpressionLanguage() : null;
         $this->reset();
     }
@@ -168,8 +170,13 @@ private function publishUpdate($entity, array $targets): void
             $iri = $entity->iri;
             $data = json_encode(['@id' => $entity->id]);
         } else {
+            // publish the message in the request's format
+            // respect the entity's serializer context
+            $resourceClass = $this->getObjectClass($entity);
+            $context = $this->resourceMetadataFactory->create($resourceClass)->getAttribute('normalization_context', []);
+
             $iri = $this->iriConverter->getIriFromItem($entity, UrlGeneratorInterface::ABS_URL);
-            $data = $this->serializer->serialize($entity, 'jsonld');
+            $data = $this->serializer->serialize($entity, key($this->formats), $context);
         }
 
         $update = new Update($iri, $data, $targets);
diff --git a/src/Bridge/Symfony/Bundle/Resources/config/doctrine_orm_mercure_publisher.xml b/src/Bridge/Symfony/Bundle/Resources/config/doctrine_orm_mercure_publisher.xml
index bf806e60986..1c218e13287 100644
--- a/src/Bridge/Symfony/Bundle/Resources/config/doctrine_orm_mercure_publisher.xml
+++ b/src/Bridge/Symfony/Bundle/Resources/config/doctrine_orm_mercure_publisher.xml
@@ -15,6 +15,7 @@
             <argument type="service" id="api_platform.serializer" />
             <argument type="service" id="message_bus" on-invalid="ignore" />
             <argument type="service" id="mercure.hub.default.publisher" />
+            <argument>%api_platform.formats%</argument>
 
             <tag name="doctrine.event_listener" event="onFlush" />
             <tag name="doctrine.event_listener" event="postFlush" />