diff --git a/src/Symfony/Component/Serializer/Normalizer/UidNormalizer.php b/src/Symfony/Component/Serializer/Normalizer/UidNormalizer.php
index 7ab8978fec..7dca504649 100644
--- a/src/Symfony/Component/Serializer/Normalizer/UidNormalizer.php
+++ b/src/Symfony/Component/Serializer/Normalizer/UidNormalizer.php
@@ -24,10 +24,6 @@ final class UidNormalizer implements NormalizerInterface, DenormalizerInterface,
      */
     public function normalize($object, string $format = null, array $context = [])
     {
-        if (!$object instanceof AbstractUid) {
-            throw new InvalidArgumentException('The object must be an instance of "Symfony\Component\Uid\AbstractUid".');
-        }
-
         return (string) $object;
     }
 
@@ -45,12 +41,10 @@ final class UidNormalizer implements NormalizerInterface, DenormalizerInterface,
     public function denormalize($data, string $type, string $format = null, array $context = [])
     {
         try {
-            $uid = Ulid::class === $type ? Ulid::fromString($data) : Uuid::fromString($data);
+            return Ulid::class === $type ? Ulid::fromString($data) : Uuid::fromString($data);
         } catch (\InvalidArgumentException $exception) {
             throw new NotNormalizableValueException(sprintf('The data is not a valid "%s" string representation.', $type));
         }
-
-        return $uid;
     }
 
     /**
diff --git a/src/Symfony/Component/Serializer/composer.json b/src/Symfony/Component/Serializer/composer.json
index 9e6b2d60ab..feeadc6cfa 100644
--- a/src/Symfony/Component/Serializer/composer.json
+++ b/src/Symfony/Component/Serializer/composer.json
@@ -34,6 +34,7 @@
         "symfony/mime": "^4.4|^5.0",
         "symfony/property-access": "^4.4|^5.0",
         "symfony/property-info": "^4.4|^5.0",
+        "symfony/uid": "^5.1",
         "symfony/validator": "^4.4|^5.0",
         "symfony/var-exporter": "^4.4|^5.0",
         "symfony/yaml": "^4.4|^5.0"