diff --git a/src/Models/Company.php b/src/Models/Company.php
index 9d803e32..b2118e12 100644
--- a/src/Models/Company.php
+++ b/src/Models/Company.php
@@ -25,5 +25,5 @@ class Company extends Person
     protected string $companyName;
     protected bool $vatApplicable;
     protected string $vatNumber;
-    protected string $chamberOfCommerce;
+    protected ?string $chamberOfCommerce;
 }