diff --git a/Controller/GraphQLiteController.php b/Controller/GraphQLiteController.php
index 6988566..b359eef 100644
--- a/Controller/GraphQLiteController.php
+++ b/Controller/GraphQLiteController.php
@@ -48,7 +48,7 @@ class GraphQLiteController
      */
     private $httpCodeDecider;
 
-    public function __construct(ServerConfig $serverConfig, HttpMessageFactoryInterface $httpMessageFactory = null, ?int $debug = null, ?HttpCodeDeciderInterface $httpCodeDecider = null)
+    public function __construct(ServerConfig $serverConfig, ?HttpMessageFactoryInterface $httpMessageFactory = null, ?int $debug = null, ?HttpCodeDeciderInterface $httpCodeDecider = null)
     {
         $this->serverConfig = $serverConfig;
         $this->httpMessageFactory = $httpMessageFactory ?: new PsrHttpFactory(new ServerRequestFactory(), new StreamFactory(), new UploadedFileFactory(), new ResponseFactory());