diff --git a/src/Option.php b/src/Option.php
index 89d01d3..4d36fcc 100644
--- a/src/Option.php
+++ b/src/Option.php
@@ -35,6 +35,7 @@ final class Option
     public function __construct(string $name)
     {
         $this->name = $name;
+        $this->validator = null;
     }
 
     public function getName(): string
@@ -81,4 +82,4 @@ public function isValid($value): bool
         }
         return true;
     }
-}
\ No newline at end of file
+}