diff --git a/gen/models.txt b/gen/models.txt
index 10aec05..fb33242 100644
--- a/gen/models.txt
+++ b/gen/models.txt
@@ -48,7 +48,7 @@ BisCompanyForm {
     endDate (string, optional): Ending date of registration
     name (string): Name of company form
     language (string, optional): Two letter language code
-    type (string): Type of company form
+    type (string, optional): Type of company form
 }
 
 BisCompanyLiquidation {
diff --git a/src/Dto/BisCompanyForm.php b/src/Dto/BisCompanyForm.php
index 0970e5d..b58b6f0 100644
--- a/src/Dto/BisCompanyForm.php
+++ b/src/Dto/BisCompanyForm.php
@@ -32,5 +32,5 @@ class BisCompanyForm extends DataTransferObject
     /**
      * Type of company form
      */
-    public string $type = '';
+    public ?string $type = null;
 }