diff --git a/Classes/Controller/StandardController.php b/Classes/Controller/StandardController.php
index 7d049d6..0948c18 100644
--- a/Classes/Controller/StandardController.php
+++ b/Classes/Controller/StandardController.php
@@ -4,6 +4,7 @@
 use GraphQL\GraphQL;
 use Neos\Flow\Annotations as Flow;
 use Neos\Flow\Mvc\Controller\ActionController;
+use Neos\Flow\Mvc\Exception\NoSuchArgumentException;
 use Wwwision\GraphQL\GraphQLContext;
 use Wwwision\GraphQL\SchemaService;
 use Wwwision\GraphQL\TypeResolver;
@@ -54,6 +55,7 @@ public function indexAction($endpoint)
      * @param string $operationName The operation to execute (if multiple, see GraphQL::execute())
      * @return void
      * @Flow\SkipCsrfProtection
+     * @throws NoSuchArgumentException
      */
     public function queryAction($endpoint, $query, $variables = null, $operationName = null)
     {
diff --git a/Classes/GraphQLContext.php b/Classes/GraphQLContext.php
index 8f55193..d5c9012 100644
--- a/Classes/GraphQLContext.php
+++ b/Classes/GraphQLContext.php
@@ -1,7 +1,7 @@
 <?php
 namespace Wwwision\GraphQL;
 
-use Neos\Flow\Http\Request as HttpRequest;
+use Psr\Http\Message\ServerRequestInterface;
 
 /**
  * A custom context that will be accessible to all resolvers
@@ -9,24 +9,24 @@
 final class GraphQLContext
 {
     /**
-     * @var HttpRequest
+     * @var ServerRequestInterface
      */
     private $httpRequest;
 
     /**
-     * @param HttpRequest $httpRequest
+     * @param ServerRequestInterface $httpRequest
      */
-    public function __construct(HttpRequest $httpRequest)
+    public function __construct(ServerRequestInterface $httpRequest)
     {
         $this->httpRequest = $httpRequest;
     }
 
     /**
-     * @return HttpRequest
+     * @return ServerRequestInterface
      */
-    public function getHttpRequest()
+    public function getHttpRequest(): ServerRequestInterface
     {
         return $this->httpRequest;
     }
 
-}
\ No newline at end of file
+}
diff --git a/Classes/Http/HttpOptionsComponent.php b/Classes/Http/HttpOptionsComponent.php
index acf8a61..d16d2b7 100644
--- a/Classes/Http/HttpOptionsComponent.php
+++ b/Classes/Http/HttpOptionsComponent.php
@@ -28,12 +28,14 @@ public function handle(ComponentContext $componentContext)
         if ($httpRequest->getMethod() !== 'OPTIONS') {
             return;
         }
+        $endpoint = ltrim($httpRequest->getUri()->getPath(), '\/');
         // no matching graphQL endpoint configured => skip
-        if (!isset($this->endpoints[$httpRequest->getRelativePath()])) {
+        if (!isset($this->endpoints[$endpoint])) {
             return;
         }
         $httpResponse = $componentContext->getHttpResponse();
-        $httpResponse->setHeader('Allow', 'GET, POST');
+        $httpResponse = $httpResponse->withHeader('Allow', 'GET, POST');
+        $componentContext->replaceHttpResponse($httpResponse);
         $componentContext->setParameter(ComponentChain::class, 'cancel', true);
     }
 }
diff --git a/Classes/Package.php b/Classes/Package.php
index b29a471..39658f6 100644
--- a/Classes/Package.php
+++ b/Classes/Package.php
@@ -9,7 +9,7 @@
 use Neos\Flow\Core\Bootstrap;
 use Neos\Flow\Monitor\FileMonitor;
 use Neos\Flow\Package\Package as BasePackage;
-use Neos\Flow\Package\PackageManagerInterface;
+use Neos\Flow\Package\PackageManager;
 use Neos\Utility\Files;
 use Neos\Utility\Unicode\Functions;
 
@@ -41,7 +41,7 @@ public function boot(Bootstrap $bootstrap)
             $graphQlFileMonitor = FileMonitor::createFileMonitorAtBoot(self::FILE_MONITOR_IDENTIFIER, $bootstrap);
             $configurationManager = $bootstrap->getEarlyInstance(ConfigurationManager::class);
             $endpointsConfiguration = $configurationManager->getConfiguration(ConfigurationManager::CONFIGURATION_TYPE_SETTINGS, 'Wwwision.GraphQL.endpoints');
-            $packageManager = $bootstrap->getEarlyInstance(PackageManagerInterface::class);
+            $packageManager = $bootstrap->getEarlyInstance(PackageManager::class);
 
             foreach($endpointsConfiguration as $endpointConfiguration) {
                 if (!isset($endpointConfiguration['schema'])) {
diff --git a/Classes/View/GraphQlView.php b/Classes/View/GraphQlView.php
index 060b66b..33bcb95 100644
--- a/Classes/View/GraphQlView.php
+++ b/Classes/View/GraphQlView.php
@@ -4,11 +4,11 @@
 use GraphQL\Error\Error;
 use GraphQL\Executor\ExecutionResult;
 use Neos\Flow\Annotations as Flow;
-use Neos\Flow\Http\Response as HttpResponse;
-use Neos\Flow\Log\SystemLoggerInterface;
+use Neos\Flow\Exception as FlowException;
+use Neos\Flow\Http\Helper\ResponseInformationHelper;
 use Neos\Flow\Log\ThrowableStorageInterface;
+use Neos\Flow\Mvc\ActionResponse;
 use Neos\Flow\Mvc\View\AbstractView;
-use Neos\Flow\Exception as FlowException;
 use Psr\Log\LoggerInterface;
 
 class GraphQlView extends AbstractView
@@ -40,9 +40,8 @@ public function render()
             throw new FlowException(sprintf('The GraphQlView expects a variable "result" of type "%s", "%s" given!', ExecutionResult::class, is_object($result) ? get_class($result) : gettype($result)), 1469545198);
         }
 
-        /** @var HttpResponse $response */
         $response = $this->controllerContext->getResponse();
-        $response->setHeader('Content-Type', 'application/json');
+        $response->setContentType('application/json');
 
         return json_encode($this->formatResult($result));
     }
@@ -67,7 +66,7 @@ private function formatResult(ExecutionResult $executionResult)
                 ];
                 $exception = $error->getPrevious();
                 if ($exception instanceof FlowException) {
-                    $errorResult['message'] = HttpResponse::getStatusMessageByCode($exception->getStatusCode());
+                    $errorResult['message'] = ResponseInformationHelper::getStatusMessageByCode($exception->getStatusCode());
                     $errorResult['_exceptionCode'] = $exception->getCode();
                     $errorResult['_statusCode'] = $exception->getStatusCode();
                     $errorResult['_referenceCode'] = $exception->getReferenceCode();
@@ -84,4 +83,4 @@ private function formatResult(ExecutionResult $executionResult)
         }
         return $convertedResult;
     }
-}
\ No newline at end of file
+}
diff --git a/composer.json b/composer.json
index fe574fa..7c9f28f 100644
--- a/composer.json
+++ b/composer.json
@@ -4,7 +4,7 @@
     "name": "wwwision/graphql",
     "license": "MIT",
     "require": {
-        "neos/flow": "^4.0 || ^5.0",
+        "neos/flow": "^6.0",
         "webonyx/graphql-php": "^0.13.0"
     },
     "autoload": {