diff --git a/src/Base/CoreMiddleware.php b/src/Base/CoreMiddleware.php
index 34b0461..eab70c3 100644
--- a/src/Base/CoreMiddleware.php
+++ b/src/Base/CoreMiddleware.php
@@ -27,6 +27,9 @@ class CoreMiddleware implements MiddlewareInterface
     public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
     {
         $response = \Kiri::getDi()->get(ResponseInterface::class);
+        if ($request->getMethod() == 'OPTIONS') {
+            return $response->withStatus(200)->withBody(new Stream(''));
+        }
         $response->withHeaders([
             'Access-Control-Allow-Headers' => $request->getHeaderLine('Access-Control-Allow-Headers'), 
             'Access-Control-Request-Method' => $request->getHeaderLine('Access-Control-Request-Method'),