diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7fcf263e..bdcc702f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,9 +3,9 @@ All notable changes to this project will be documented in this file.
 
 See [DocuSign Support Center](https://support.docusign.com/en/releasenotes/) for Product Release Notes.
 
-## [v6.17.0-rc] - eSignature API v2.1-23.3.00.00 - 2023-08-21
+## [v6.17.0-rc] - eSignature API v2.1-23.3.00.01 - 2023-08-30
 ### Changed
-- Added support for version v2.1-23.3.00.00 of the DocuSign ESignature API.
+- Added support for version v2.1-23.3.00.01 of the DocuSign ESignature API.
 - Updated the SDK release version.
 
 ## [v6.16.0] - eSignature API v2.1-23.2.00.00 - 2023-06-27
diff --git a/src/Model/Brand.php b/src/Model/Brand.php
index 889c7b00..f726c345 100644
--- a/src/Model/Brand.php
+++ b/src/Model/Brand.php
@@ -100,7 +100,7 @@ class Brand implements ModelInterface, ArrayAccess
         'landing_pages' => null,
         'links' => null,
         'logos' => null,
-        'organization_brand_logo' => 'byte',
+        'organization_brand_logo' => null,
         'resources' => null
     ];
 
@@ -288,10 +288,6 @@ public function listInvalidProperties()
     {
         $invalidProperties = [];
 
-        if (!is_null($this->container['organization_brand_logo']) && !preg_match("/^(?:[A-Za-z0-9+\/]{4})*(?:[A-Za-z0-9+\/]{2}==|[A-Za-z0-9+\/]{3}=)?$/", $this->container['organization_brand_logo'])) {
-            $invalidProperties[] = "invalid value for 'organization_brand_logo', must be conform to the pattern /^(?:[A-Za-z0-9+\/]{4})*(?:[A-Za-z0-9+\/]{2}==|[A-Za-z0-9+\/]{3}=)?$/.";
-        }
-
         return $invalidProperties;
     }
 
@@ -686,11 +682,6 @@ public function getOrganizationBrandLogo()
      */
     public function setOrganizationBrandLogo($organization_brand_logo)
     {
-
-        if (!is_null($organization_brand_logo) && (!preg_match("/^(?:[A-Za-z0-9+\/]{4})*(?:[A-Za-z0-9+\/]{2}==|[A-Za-z0-9+\/]{3}=)?$/", $organization_brand_logo))) {
-            throw new \InvalidArgumentException("invalid value for $organization_brand_logo when calling Brand., must conform to the pattern /^(?:[A-Za-z0-9+\/]{4})*(?:[A-Za-z0-9+\/]{2}==|[A-Za-z0-9+\/]{3}=)?$/.");
-        }
-
         $this->container['organization_brand_logo'] = $organization_brand_logo;
 
         return $this;