diff --git a/src/JWT/CustomTokenGenerator.php b/src/JWT/CustomTokenGenerator.php
index 63b3480..31d7e1a 100644
--- a/src/JWT/CustomTokenGenerator.php
+++ b/src/JWT/CustomTokenGenerator.php
@@ -54,11 +54,11 @@ public function execute(CreateCustomToken $action): Token
 
     /**
      * @param non-empty-string $uid
-     * @param array<non-empty-string, mixed> $claims
+     * @param array<non-empty-string, mixed>|null $claims
      *
      * @throws CustomTokenCreationFailed
      */
-    public function createCustomToken(string $uid, ?array $claims = null, Duration|DateInterval|string|int $timeToLive = null): Token
+    public function createCustomToken(string $uid, array|null $claims = null, Duration|DateInterval|string|int|null $timeToLive = null): Token
     {
         $action = CreateCustomToken::forUid($uid);