diff --git a/dist/billing/CreditPeriod.d.ts b/dist/billing/CreditPeriod.d.ts
index ce2de85..9cc0ff7 100644
--- a/dist/billing/CreditPeriod.d.ts
+++ b/dist/billing/CreditPeriod.d.ts
@@ -1,4 +1,5 @@
 export declare enum CreditPeriod {
+    YEAR = "year",
     MONTH = "month",
     DAY = "day",
     ONCE = "once"
diff --git a/dist/billing/CreditPeriod.js b/dist/billing/CreditPeriod.js
index bec3118..a056e88 100644
--- a/dist/billing/CreditPeriod.js
+++ b/dist/billing/CreditPeriod.js
@@ -3,6 +3,7 @@ Object.defineProperty(exports, "__esModule", { value: true });
 exports.CreditPeriod = void 0;
 var CreditPeriod;
 (function (CreditPeriod) {
+    CreditPeriod["YEAR"] = "year";
     CreditPeriod["MONTH"] = "month";
     CreditPeriod["DAY"] = "day";
     CreditPeriod["ONCE"] = "once";
diff --git a/dist/billing/CreditPeriod.js.map b/dist/billing/CreditPeriod.js.map
index b3bb35d..acf1db0 100644
--- a/dist/billing/CreditPeriod.js.map
+++ b/dist/billing/CreditPeriod.js.map
@@ -1 +1 @@
-{"version":3,"file":"CreditPeriod.js","sourceRoot":"/","sources":["billing/CreditPeriod.ts"],"names":[],"mappings":";;;AAAA,IAAY,YAIX;AAJD,WAAY,YAAY;IACpB,+BAAe,CAAA;IACf,2BAAW,CAAA;IACX,6BAAa,CAAA;AACjB,CAAC,EAJW,YAAY,4BAAZ,YAAY,QAIvB","sourcesContent":["export enum CreditPeriod {\r\n    MONTH = \"month\",\r\n    DAY = \"day\",\r\n    ONCE = \"once\"\r\n}"]}
\ No newline at end of file
+{"version":3,"file":"CreditPeriod.js","sourceRoot":"/","sources":["billing/CreditPeriod.ts"],"names":[],"mappings":";;;AAAA,IAAY,YAKX;AALD,WAAY,YAAY;IACpB,6BAAa,CAAA;IACb,+BAAe,CAAA;IACf,2BAAW,CAAA;IACX,6BAAa,CAAA;AACjB,CAAC,EALW,YAAY,4BAAZ,YAAY,QAKvB","sourcesContent":["export enum CreditPeriod {\r\n    YEAR = \"year\",\r\n    MONTH = \"month\",\r\n    DAY = \"day\",\r\n    ONCE = \"once\"\r\n}"]}
\ No newline at end of file
diff --git a/src/billing/CreditPeriod.ts b/src/billing/CreditPeriod.ts
index f776152..5ed6611 100644
--- a/src/billing/CreditPeriod.ts
+++ b/src/billing/CreditPeriod.ts
@@ -1,4 +1,5 @@
 export enum CreditPeriod {
+    YEAR = "year",
     MONTH = "month",
     DAY = "day",
     ONCE = "once"