diff --git a/Controller/GraphqliteController.php b/Controller/GraphqliteController.php
index 1316201..3af8756 100644
--- a/Controller/GraphqliteController.php
+++ b/Controller/GraphqliteController.php
@@ -108,7 +108,7 @@ private function handlePsr7Request(ServerRequestInterface $request, Request $sym
             }, $result);
             // Let's return the highest result.
             $statuses = array_map([$httpCodeDecider, 'decideHttpStatusCode'], $result);
-            $status = max($statuses);
+            $status = empty($statuses) ? 500 : max($statuses);
             return new JsonResponse($finalResult, $status);
         }
         if ($result instanceof Promise) {
diff --git a/composer.json b/composer.json
index 566777e..bd897ab 100644
--- a/composer.json
+++ b/composer.json
@@ -17,8 +17,8 @@
   ],
   "require" : {
     "php" : ">=7.2",
-    "thecodingmachine/graphqlite" : "~4.0.1",
-    "thecodingmachine/graphqlite-symfony-validator-bridge" : "~4.0.0",
+    "thecodingmachine/graphqlite" : "^4.1",
+    "thecodingmachine/graphqlite-symfony-validator-bridge" : "^4.1",
     "symfony/framework-bundle": "^4.1.9 | ^5",
     "symfony/validator": "^4.1.9 | ^5",
     "symfony/translation": "^4.1.9 | ^5",
@@ -52,7 +52,7 @@
   },
   "extra": {
     "branch-alias": {
-      "dev-master": "4.0.x-dev"
+      "dev-master": "4.1.x-dev"
     }
   },
   "minimum-stability": "dev",