diff --git a/lib/messages.g.dart b/lib/messages.g.dart
index 08c6772..f62d814 100644
--- a/lib/messages.g.dart
+++ b/lib/messages.g.dart
@@ -209,6 +209,7 @@ const _$PaymentMethodTypeEnumMap = {
   PaymentMethodType.affirm: 'affirm',
   PaymentMethodType.afterpay_clearpay: 'afterpay_clearpay',
   PaymentMethodType.alipay: 'alipay',
+  PaymentMethodType.amazon_pay: 'amazon_pay',
   PaymentMethodType.au_becs_debit: 'au_becs_debit',
   PaymentMethodType.bacs_debit: 'bacs_debit',
   PaymentMethodType.bancontact: 'bancontact',
diff --git a/lib/src/messages/checkout_session.dart b/lib/src/messages/checkout_session.dart
index 0c73e3e..519c96d 100644
--- a/lib/src/messages/checkout_session.dart
+++ b/lib/src/messages/checkout_session.dart
@@ -8,6 +8,8 @@ enum PaymentMethodType {
   afterpay_clearpay,
   alipay,
   // ignore: constant_identifier_names
+  amazon_pay,
+  // ignore: constant_identifier_names
   au_becs_debit,
   // ignore: constant_identifier_names
   bacs_debit,