diff --git a/examples/coroutines/concurrency.php b/examples/coroutines/concurrency.php
index 6ff0168..ffbb80c 100644
--- a/examples/coroutines/concurrency.php
+++ b/examples/coroutines/concurrency.php
@@ -1,5 +1,5 @@
-<?php
 #!/usr/bin/env php
+<?php
 
 require __DIR__ . '/../../vendor/autoload.php';