diff --git a/engineer b/engineer
index 3119ae1..e719cc3 100644
--- a/engineer
+++ b/engineer
@@ -4,7 +4,7 @@ use Tower\Engineer;
 
 require __DIR__ . '/vendor/autoload.php';
 
-$engineer = new Engineer('1.20.0');
+$engineer = new Engineer('1.21.0');