diff --git a/lib/recurly.d.ts b/lib/recurly.d.ts
index 7009d258..7afad55b 100644
--- a/lib/recurly.d.ts
+++ b/lib/recurly.d.ts
@@ -342,6 +342,10 @@ export declare class BillingInfo {
    * The `backup_payment_method` field is used to indicate a billing info as a backup on the account that will be tried if the initial billing info used for an invoice is declined.
    */
   backupPaymentMethod?: boolean | null;
+  /**
+   * Array of Payment Gateway References, each a reference to a third-party gateway object of varying types.
+   */
+  paymentGatewayReferences?: PaymentGatewayReferences[] | null;
   /**
    * When the billing information was created.
    */
@@ -451,6 +455,18 @@ export declare class FraudInfo {
 
 }
 
+export declare class PaymentGatewayReferences {
+  /**
+   * Reference value used when the external token was created. If Stripe gateway is used, this value will need to be accompanied by its reference_type.
+   */
+  token?: string | null;
+  /**
+   * The type of reference token. Required if token is passed in for Stripe Gateway.
+   */
+  referenceType?: string | null;
+
+}
+
 export declare class BillingInfoUpdatedBy {
   /**
    * Customer's IP address when updating their billing information.
@@ -4238,9 +4254,13 @@ export interface BillingInfoCreate {
     */
   gatewayToken?: string | null;
   /**
-    * An identifier for a specific payment gateway. Must be used in conjunction with `gateway_token`.
+    * An identifier for a specific payment gateway.
     */
   gatewayCode?: string | null;
+  /**
+    * Array of Payment Gateway References, each a reference to a third-party gateway object of varying types.
+    */
+  paymentGatewayReferences?: PaymentGatewayReferences[] | null;
   /**
     * Additional attributes to send to the gateway.
     */
@@ -4329,6 +4349,18 @@ export interface BillingInfoCreate {
 
 }
 
+export interface PaymentGatewayReferences {
+  /**
+    * Reference value used when the external token was created. If Stripe gateway is used, this value will need to be accompanied by its reference_type.
+    */
+  token?: string | null;
+  /**
+    * The type of reference token. Required if token is passed in for Stripe Gateway.
+    */
+  referenceType?: string | null;
+
+}
+
 export interface GatewayAttributes {
   /**
     * Used by Adyen and Braintree gateways. For Adyen the Shopper Reference value used when the external token was created. Must be used in conjunction with gateway_token and gateway_code. For Braintree the PayPal PayerID is populated in the response.
@@ -4794,7 +4826,7 @@ export interface CouponUpdate {
 
 export interface CouponBulkCreate {
   /**
-    * The quantity of unique coupon codes to generate
+    * The quantity of unique coupon codes to generate. A bulk coupon can have up to 100,000 unique codes (or your site's configured limit).
     */
   numberOfUniqueCodes?: number | null;
 
@@ -8465,6 +8497,7 @@ endpoint to obtain only the newly generated `UniqueCouponCodes`.
    * @param {Date} options.params.endTime - Inclusively filter by end_time when `sort=created_at` or `sort=updated_at`.
    *   **Note:** this value is an ISO8601 timestamp. A partial timestamp that does not include a time zone will default to UTC.
    *   
+   * @param {string} options.params.redeemed - Filter unique coupon codes by redemption status. `true` for redeemed, `false` for not redeemed.
    * @return {Pager<UniqueCouponCode>} A list of unique coupon codes that were generated
    */
   listUniqueCouponCodes(couponId: string, options?: object): Pager<UniqueCouponCode>;
diff --git a/lib/recurly/Client.js b/lib/recurly/Client.js
index 64dcd3be..f4246486 100644
--- a/lib/recurly/Client.js
+++ b/lib/recurly/Client.js
@@ -1837,6 +1837,7 @@ endpoint to obtain only the newly generated `UniqueCouponCodes`.
    * @param {Date} options.params.endTime - Inclusively filter by end_time when `sort=created_at` or `sort=updated_at`.
    *   **Note:** this value is an ISO8601 timestamp. A partial timestamp that does not include a time zone will default to UTC.
    *
+   * @param {string} options.params.redeemed - Filter unique coupon codes by redemption status. `true` for redeemed, `false` for not redeemed.
    * @return {Pager<UniqueCouponCode>} A list of unique coupon codes that were generated
    */
   listUniqueCouponCodes (couponId, options = {}) {
diff --git a/lib/recurly/resources/BillingInfo.js b/lib/recurly/resources/BillingInfo.js
index 6690c847..141ce4b3 100644
--- a/lib/recurly/resources/BillingInfo.js
+++ b/lib/recurly/resources/BillingInfo.js
@@ -22,6 +22,7 @@ const Resource = require('../Resource')
  * @prop {string} id
  * @prop {string} lastName
  * @prop {string} object - Object type
+ * @prop {Array.<PaymentGatewayReferences>} paymentGatewayReferences - Array of Payment Gateway References, each a reference to a third-party gateway object of varying types.
  * @prop {PaymentMethod} paymentMethod
  * @prop {boolean} primaryPaymentMethod - The `primary_payment_method` field is used to indicate the primary billing info on the account. The first billing info created on an account will always become primary. This payment method will be used
  * @prop {Date} updatedAt - When the billing information was last changed.
@@ -42,6 +43,7 @@ class BillingInfo extends Resource {
       id: String,
       lastName: String,
       object: String,
+      paymentGatewayReferences: ['PaymentGatewayReferences'],
       paymentMethod: 'PaymentMethod',
       primaryPaymentMethod: Boolean,
       updatedAt: Date,
diff --git a/lib/recurly/resources/PaymentGatewayReferences.js b/lib/recurly/resources/PaymentGatewayReferences.js
new file mode 100644
index 00000000..0251744e
--- /dev/null
+++ b/lib/recurly/resources/PaymentGatewayReferences.js
@@ -0,0 +1,27 @@
+/* istanbul ignore file */
+/**
+ * This file is automatically created by Recurly's OpenAPI generation process
+ * and thus any edits you make by hand will be lost. If you wish to make a
+ * change to this file, please create a Github issue explaining the changes you
+ * need and we will usher them to the appropriate places.
+ */
+'use strict'
+
+const Resource = require('../Resource')
+
+/**
+ * PaymentGatewayReferences
+ * @typedef {Object} PaymentGatewayReferences
+ * @prop {string} referenceType - The type of reference token. Required if token is passed in for Stripe Gateway.
+ * @prop {string} token - Reference value used when the external token was created. If Stripe gateway is used, this value will need to be accompanied by its reference_type.
+ */
+class PaymentGatewayReferences extends Resource {
+  static getSchema () {
+    return {
+      referenceType: String,
+      token: String
+    }
+  }
+}
+
+module.exports = PaymentGatewayReferences
diff --git a/lib/recurly/resources/index.js b/lib/recurly/resources/index.js
index bd9ab80a..77a1d9de 100644
--- a/lib/recurly/resources/index.js
+++ b/lib/recurly/resources/index.js
@@ -18,6 +18,7 @@ module.exports.BillingInfo = require('./BillingInfo')
 module.exports.PaymentMethod = require('./PaymentMethod')
 module.exports.GatewayAttributes = require('./GatewayAttributes')
 module.exports.FraudInfo = require('./FraudInfo')
+module.exports.PaymentGatewayReferences = require('./PaymentGatewayReferences')
 module.exports.BillingInfoUpdatedBy = require('./BillingInfoUpdatedBy')
 module.exports.CustomField = require('./CustomField')
 module.exports.ErrorMayHaveTransaction = require('./ErrorMayHaveTransaction')
diff --git a/openapi/api.yaml b/openapi/api.yaml
index 460dd35f..ea3982f5 100644
--- a/openapi/api.yaml
+++ b/openapi/api.yaml
@@ -6265,8 +6265,7 @@ paths:
               schema:
                 "$ref": "#/components/schemas/UniqueCouponCodeParams"
         '400':
-          description: Invalid or unpermitted parameter; perhaps you tried to generate
-            more than 200 codes at a time?
+          description: Invalid or unpermitted parameter.
           content:
             application/json:
               schema:
@@ -6348,6 +6347,7 @@ paths:
       - "$ref": "#/components/parameters/sort_dates"
       - "$ref": "#/components/parameters/filter_begin_time"
       - "$ref": "#/components/parameters/filter_end_time"
+      - "$ref": "#/components/parameters/filter_redeemed"
       responses:
         '200':
           description: A list of unique coupon codes that were generated
@@ -17184,6 +17184,13 @@ components:
         - `type=legacy`, only legacy invoices will be returned.
       schema:
         "$ref": "#/components/schemas/FilterInvoiceTypeEnum"
+    filter_redeemed:
+      name: redeemed
+      in: query
+      description: Filter unique coupon codes by redemption status. `true` for redeemed,
+        `false` for not redeemed.
+      schema:
+        "$ref": "#/components/schemas/FilterRedeemedEnum"
     export_date:
       name: export_date
       in: path
@@ -18733,6 +18740,12 @@ components:
           description: The `backup_payment_method` field is used to indicate a billing
             info as a backup on the account that will be tried if the initial billing
             info used for an invoice is declined.
+        payment_gateway_references:
+          type: array
+          description: Array of Payment Gateway References, each a reference to a
+            third-party gateway object of varying types.
+          items:
+            "$ref": "#/components/schemas/PaymentGatewayReferences"
         created_at:
           type: string
           format: date-time
@@ -18815,9 +18828,21 @@ components:
           maxLength: 50
         gateway_code:
           type: string
-          title: An identifier for a specific payment gateway. Must be used in conjunction
-            with `gateway_token`.
+          title: An identifier for a specific payment gateway.
           maxLength: 12
+        payment_gateway_references:
+          type: array
+          description: Array of Payment Gateway References, each a reference to a
+            third-party gateway object of varying types.
+          items:
+            "$ref": "#/components/schemas/PaymentGatewayReferences"
+          properties:
+            token:
+              type: strings
+              maxLength: 50
+            reference_type:
+              type: string
+              "$ref": "#/components/schemas/PaymentGatewayReferencesEnum"
         gateway_attributes:
           type: object
           description: Additional attributes to send to the gateway.
@@ -19282,9 +19307,9 @@ components:
         number_of_unique_codes:
           type: integer
           title: Number of unique codes
-          description: The quantity of unique coupon codes to generate
+          description: The quantity of unique coupon codes to generate. A bulk coupon
+            can have up to 100,000 unique codes (or your site's configured limit).
           minimum: 1
-          maximum: 200
     CouponMini:
       type: object
       properties:
@@ -21285,6 +21310,22 @@ components:
       - currency
       - unit_amount
       - type
+    PaymentGatewayReferences:
+      type: object
+      title: Payment Gateway References Object
+      description: Array of Payment Gateway References, each a reference to a third-party
+        gateway object of varying types.
+      properties:
+        token:
+          type: string
+          title: Token
+          description: Reference value used when the external token was created. If
+            Stripe gateway is used, this value will need to be accompanied by its
+            reference_type.
+        reference_type:
+          type: string
+          title: Reference Type
+          "$ref": "#/components/schemas/PaymentGatewayReferencesEnum"
     PlanMini:
       type: object
       title: Plan mini details
@@ -26430,6 +26471,11 @@ components:
       - credit
       - legacy
       - non-legacy
+    FilterRedeemedEnum:
+      type: string
+      enum:
+      - true
+      - false
     ChannelEnum:
       type: string
       enum:
@@ -26491,6 +26537,14 @@ components:
       enum:
       - email
       - post
+    PaymentGatewayReferencesEnum:
+      type: string
+      description: The type of reference token. Required if token is passed in for
+        Stripe Gateway.
+      enum:
+      - stripe_confirmation_token
+      - stripe_customer
+      - stripe_payment_method
     GatewayTransactionTypeEnum:
       type: string
       enum:
diff --git a/package-lock.json b/package-lock.json
index 918c29e7..39d4cb34 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "recurly",
-  "version": "4.57.0",
+  "version": "4.58.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "recurly",
-      "version": "4.57.0",
+      "version": "4.58.0",
       "license": "MIT",
       "devDependencies": {
         "@types/node": "^12.11.1",