diff --git a/src/GatewayChecksum.php b/src/GatewayChecksum.php
index 0d40bd9..27fec38 100644
--- a/src/GatewayChecksum.php
+++ b/src/GatewayChecksum.php
@@ -8,8 +8,8 @@
 //
 class GatewayChecksum {
   public static $checksum = "";
-  public static $baseChecksum = "30da002a9474eddfd8d4a2c6246cac31";
-  public static $versionNo = "P6.29";
+  public static $baseChecksum = "df1f19a68d0f7e14ad6d6a08b6190fa0";
+  public static $versionNo = "P6.30";
 
 //////////////////////////////////////////////////////////////////////
 //
@@ -27,7 +27,7 @@ static function SetVersion()
 		  md5_file($dirName . "/GatewayCodes.php");
     GatewayChecksum::$checksum = md5($baseString);
     if (GatewayChecksum::$checksum != GatewayChecksum::$baseChecksum)
-      GatewayChecksum::$versionNo = "P6.29m";
+      GatewayChecksum::$versionNo = "P6.30m";
   }
 }
 
diff --git a/src/GatewayRequest.php b/src/GatewayRequest.php
index 800b16d..f63b7ad 100644
--- a/src/GatewayRequest.php
+++ b/src/GatewayRequest.php
@@ -197,6 +197,7 @@ static function UDF02() { return "udf02"; }
   static function USE_3D_SECURE() { return "use3DSecure"; }
   static function USERNAME() { return "username"; }
   static function XSELL_MERCHANT_ID() { return "xsellMerchantID"; }
+  static function XSELL_MERCHANT_ACCOUNT() { return "xsellMerchantAccount"; }
   static function XSELL_CUSTOMER_ID() { return "xsellCustomerID"; }
   static function XSELL_REFERENCE_XACT() { return "xsellReferenceXact"; }
   static function _3D_CHECK() { return "ThreeDCheck"; }