diff --git a/lib/ObjectSerializer.php b/lib/ObjectSerializer.php
index 160619f..48841d0 100644
--- a/lib/ObjectSerializer.php
+++ b/lib/ObjectSerializer.php
@@ -494,8 +494,9 @@ public static function deserialize($data, $class, $httpHeaders = null)
 
 
         if (method_exists($class, 'getAllowableEnumValues')) {
-            if (!in_array($data, $class::getAllowableEnumValues(), true)) {
-                $data = end($class::getAllowableEnumValues());
+            $enumValues = $class::getAllowableEnumValues();
+            if (!in_array($data, $enumValues, true)) {
+                $data = end($enumValues);
             }
             return $data;
         } else {
diff --git a/lib/PaymentMethod/DirectDebitChannelCode.php b/lib/PaymentMethod/DirectDebitChannelCode.php
index df17fa2..ea3ef2d 100644
--- a/lib/PaymentMethod/DirectDebitChannelCode.php
+++ b/lib/PaymentMethod/DirectDebitChannelCode.php
@@ -223,6 +223,12 @@ class DirectDebitChannelCode
     
     public const XENDIT_ENUM_DEFAULT_FALLBACK = 'UNKNOWN_ENUM_VALUE';
 
+    public const BPI_DIRECT_DEBIT = 'BPI_DIRECT_DEBIT';
+
+    public const UBP_DIRECT_DEBIT = 'UBP_DIRECT_DEBIT';
+
+    public const RCBC_DIRECT_DEBIT = 'RCBC_DIRECT_DEBIT';
+
     private $value;
 
     public function __construct($value = null) {
@@ -343,7 +349,10 @@ public static function getAllowableEnumValues()
             self::GBW_KTB,
             self::GBW_SCB,
             self::GBW_BAY,
-            self::XENDIT_ENUM_DEFAULT_FALLBACK
+            self::XENDIT_ENUM_DEFAULT_FALLBACK,
+            self::BPI_DIRECT_DEBIT,
+            self::UBP_DIRECT_DEBIT,
+            self::RCBC_DIRECT_DEBIT
         ];
     }
 }
diff --git a/lib/PaymentRequest/DirectDebitChannelCode.php b/lib/PaymentRequest/DirectDebitChannelCode.php
index 17d5ead..2cc35b6 100644
--- a/lib/PaymentRequest/DirectDebitChannelCode.php
+++ b/lib/PaymentRequest/DirectDebitChannelCode.php
@@ -199,6 +199,12 @@ class DirectDebitChannelCode
     
     public const XENDIT_ENUM_DEFAULT_FALLBACK = 'UNKNOWN_ENUM_VALUE';
 
+    public const BPI_DIRECT_DEBIT = 'BPI_DIRECT_DEBIT';
+
+    public const UBP_DIRECT_DEBIT = 'UBP_DIRECT_DEBIT';
+
+    public const RCBC_DIRECT_DEBIT = 'RCBC_DIRECT_DEBIT';
+
     private $value;
 
     public function __construct($value = null) {
@@ -307,7 +313,10 @@ public static function getAllowableEnumValues()
             self::RCBC_ONLINE_BANKING,
             self::ROBINSONS_BANK_ONLINE_BANKING,
             self::SECURITY_BANK_ONLINE_BANKING,
-            self::XENDIT_ENUM_DEFAULT_FALLBACK
+            self::XENDIT_ENUM_DEFAULT_FALLBACK,
+            self::BPI_DIRECT_DEBIT,
+            self::UBP_DIRECT_DEBIT,
+            self::RCBC_DIRECT_DEBIT
         ];
     }
 }
diff --git a/lib/PaymentRequest/EWalletChannelCode.php b/lib/PaymentRequest/EWalletChannelCode.php
index 55ffd1c..122f8b0 100644
--- a/lib/PaymentRequest/EWalletChannelCode.php
+++ b/lib/PaymentRequest/EWalletChannelCode.php
@@ -76,6 +76,8 @@ class EWalletChannelCode
     public const ALIPAY = 'ALIPAY';
     
     public const TOUCHNGO = 'TOUCHNGO';
+
+    public const GOPAY = 'GOPAY';
     
     public const XENDIT_ENUM_DEFAULT_FALLBACK = 'UNKNOWN_ENUM_VALUE';
 
@@ -127,6 +129,7 @@ public static function getAllowableEnumValues()
             self::TRUEMONEY,
             self::ALIPAY,
             self::TOUCHNGO,
+            self::GOPAY,
             self::XENDIT_ENUM_DEFAULT_FALLBACK
         ];
     }