diff --git a/src/ClientFactory.php b/src/ClientFactory.php
index 1e6c8a4..06c24c9 100644
--- a/src/ClientFactory.php
+++ b/src/ClientFactory.php
@@ -9,7 +9,7 @@
  *
  * @author Oleg Voronkovich <oleg-voronkovich@yandex.ru>
  */
-final class ClientFactory
+class ClientFactory
 {
     /**
      * Create a client for the Sberbank production environment.