diff --git a/src/ValueObject/ValueObject.php b/src/ValueObject/ValueObject.php
index 8d0f287..3e231f3 100644
--- a/src/ValueObject/ValueObject.php
+++ b/src/ValueObject/ValueObject.php
@@ -80,7 +80,7 @@ public function setError($paramName, $message)
     public function afterValidation(array $params)
     {}
 
-    public function __call(string $name, array $arguments )
+    public function __call($name, array $arguments )
     {
         $paramName = lcfirst(substr($name, 3));