diff --git a/src/Auth/ServiceClient.php b/src/Auth/ServiceClient.php
index fabbb3c6..9ab6d9b9 100644
--- a/src/Auth/ServiceClient.php
+++ b/src/Auth/ServiceClient.php
@@ -242,7 +242,7 @@ private function RefreshServiceProxy()
 			'features' => SOAP_SINGLE_ELEMENT_ARRAYS,
 			// Disable keep_alive to avoid 'Process open FD table is full'
 			'keep_alive' => FALSE, 
-			'user_agent' => 'BingAdsSDKPHP ' . '13.0.16 ' . PHP_VERSION, 
+			'user_agent' => 'BingAdsSDKPHP ' . '13.0.16.1 ' . PHP_VERSION, 
 			'cache_wsdl' => 'WSDL_CACHE_NONE',
 
 			/**