diff --git a/README.md b/README.md
index 475cd5d..94df596 100644
--- a/README.md
+++ b/README.md
@@ -31,7 +31,7 @@ The list of endpoints then looks like the following:
 
 ## Development usage
 
-It is also possible to obtain the JSON representation of a supported entity:
+It is also possible to obtain the JSON API representation of a supported entity:
 
   // For a given $entity object.
   $json = \Drupal::service('jsonapi.entity.to_json')->normalizeEntity($entity);
diff --git a/src/ToJson.php b/src/ToJson.php
index cfde37c..47394ca 100644
--- a/src/ToJson.php
+++ b/src/ToJson.php
@@ -50,7 +50,7 @@ public function __construct(ContentEntityNormalizer $normalizer, SerializerInter
    */
   public function serializeEntity(EntityInterface $entity) {
     $normalized_entity = $this->normalizeEntity($entity);
-    return $this->serializer->serialize($normalized_entity, 'json');
+    return $this->serializer->serialize($normalized_entity, 'api_json');
   }
 
   /**