diff --git a/composer.json b/composer.json
index 0735792b7..62e9f29ce 100644
--- a/composer.json
+++ b/composer.json
@@ -45,7 +45,7 @@
         "symfony/security-csrf": "^7.4",
         "symfony/yaml": "^7.4",
         "twig/twig": "^3.0",
-        "webmozart/assert": "^1.11"
+        "webmozart/assert": "^2.3"
     },
     "require-dev": {
         "ibexa/code-style": "~2.0.0",
diff --git a/src/contracts/Output/VisitorAdapterNormalizer.php b/src/contracts/Output/VisitorAdapterNormalizer.php
index 17cb0d7a1..9a455d7b5 100644
--- a/src/contracts/Output/VisitorAdapterNormalizer.php
+++ b/src/contracts/Output/VisitorAdapterNormalizer.php
@@ -34,6 +34,8 @@ public function __construct(
     /**
      * @param array<string, mixed> $context
      *
+     * @return array<mixed>|string|int|float|bool|\ArrayObject|null
+     *
      * @throws \Symfony\Component\Serializer\Exception\ExceptionInterface
      */
     public function normalize(mixed $object, ?string $format = null, array $context = []): array|bool|string|int|float|null|\ArrayObject