diff --git a/src/LaravelEcho/Http/Controllers/EchoController.php b/src/LaravelEcho/Http/Controllers/EchoController.php
index 79d9e39..2ff2a65 100644
--- a/src/LaravelEcho/Http/Controllers/EchoController.php
+++ b/src/LaravelEcho/Http/Controllers/EchoController.php
@@ -68,7 +68,7 @@ abstract class EchoController implements HttpServerInterface
                 'error' => $exception->getMessage()
             ]));
 
-            $connection->send(gPsr\str($response));
+            $connection->send(Psr\str($response));
             $connection->close();
         }
     }