diff --git a/Factory/PsrHttpFactory.php b/Factory/PsrHttpFactory.php
index 61650df..b1b6f9a 100644
--- a/Factory/PsrHttpFactory.php
+++ b/Factory/PsrHttpFactory.php
@@ -142,7 +142,7 @@ public function createResponse(Response $symfonyResponse)
                     $stream->write($buffer);
 
                     return '';
-                });
+                }, 1);
 
                 $symfonyResponse->sendContent();
                 ob_end_clean();