diff --git a/box_sdk_gen/schemas/sign_request_signer_input_custom_validation.py b/box_sdk_gen/schemas/sign_request_signer_input_custom_validation.py
index 2b218889..5c0d7d72 100644
--- a/box_sdk_gen/schemas/sign_request_signer_input_custom_validation.py
+++ b/box_sdk_gen/schemas/sign_request_signer_input_custom_validation.py
@@ -1,5 +1,7 @@
 from enum import Enum
 
+from typing import Optional
+
 from box_sdk_gen.internal.base_object import BaseObject
 
 from box_sdk_gen.box.errors import BoxSDKError
@@ -12,22 +14,22 @@ class SignRequestSignerInputCustomValidationValidationTypeField(str, Enum):
 class SignRequestSignerInputCustomValidation(BaseObject):
     def __init__(
         self,
-        custom_regex: str,
-        custom_error_message: str,
         *,
         validation_type: SignRequestSignerInputCustomValidationValidationTypeField = SignRequestSignerInputCustomValidationValidationTypeField.CUSTOM,
+        custom_regex: Optional[str] = None,
+        custom_error_message: Optional[str] = None,
         **kwargs
     ):
         """
-                :param custom_regex: Regular expression used for validation.
-                :type custom_regex: str
-                :param custom_error_message: Error message shown if input fails custom regular expression validation.
-                :type custom_error_message: str
                 :param validation_type: Defines the validation format for the text input as custom.
         A custom regular expression is used for validation., defaults to SignRequestSignerInputCustomValidationValidationTypeField.CUSTOM
                 :type validation_type: SignRequestSignerInputCustomValidationValidationTypeField, optional
+                :param custom_regex: Regular expression used for validation., defaults to None
+                :type custom_regex: Optional[str], optional
+                :param custom_error_message: Error message shown if input fails custom regular expression validation., defaults to None
+                :type custom_error_message: Optional[str], optional
         """
         super().__init__(**kwargs)
+        self.validation_type = validation_type
         self.custom_regex = custom_regex
         self.custom_error_message = custom_error_message
-        self.validation_type = validation_type