diff --git a/README.md b/README.md
index e5d12d4..41a06d5 100644
--- a/README.md
+++ b/README.md
@@ -1349,6 +1349,7 @@ dd.getPaymentMethodsByCustomerID(data: {
 ```ts
 dd.createDirectDebitPayment(data: {
   idempotencyKey: string;
+  apiVersion?: string;
   referenceID: string;
   paymentMethodID: string;
   currency: string;
@@ -1370,6 +1371,7 @@ dd.createDirectDebitPayment(data: {
 dd.validateOTPforPayment(data: {
   directDebitID: string;
   otpCode: string;
+  apiVersion?: string;
 })
 ```
 
diff --git a/integration_test/direct_debit.test.js b/integration_test/direct_debit.test.js
index 11107f0..bd8b63a 100644
--- a/integration_test/direct_debit.test.js
+++ b/integration_test/direct_debit.test.js
@@ -58,6 +58,7 @@ module.exports = function() {
     .then(r =>
       dd.createDirectDebitPayment({
         idempotencyKey: new Date().toISOString(),
+        apiVersion: null,
         referenceID: 'merchant-ref-id-ex-1',
         paymentMethodID: r[0].id,
         currency: 'IDR',
@@ -96,6 +97,7 @@ module.exports = function() {
       dd.validateOTPforPayment({
         directDebitID: r.id,
         otpCode: '222000',
+        apiVersion: null,
       }),
     )
     .then(r =>
diff --git a/src/direct_debit/direct_debit_payment.d.ts b/src/direct_debit/direct_debit_payment.d.ts
index 0aa5f0f..c300158 100644
--- a/src/direct_debit/direct_debit_payment.d.ts
+++ b/src/direct_debit/direct_debit_payment.d.ts
@@ -14,6 +14,7 @@ interface Basket {
 
 export function createDirectDebitPayment(data: {
   idempotencyKey: string;
+  apiVersion?: string;
   referenceID: string;
   paymentMethodID: string;
   currency: string;
@@ -31,6 +32,7 @@ export function createDirectDebitPayment(data: {
 export function validateOTPforPayment(data: {
   directDebitID: string;
   otpCode: string;
+  apiVersion?: string;
 }): Promise<object>;
 
 export function getDirectDebitPaymentStatusByID(data: {
diff --git a/src/direct_debit/direct_debit_payment.js b/src/direct_debit/direct_debit_payment.js
index c74315d..1e94b2c 100644
--- a/src/direct_debit/direct_debit_payment.js
+++ b/src/direct_debit/direct_debit_payment.js
@@ -12,13 +12,18 @@ function createDirectDebitPayment(data) {
     ];
     Validate.rejectOnMissingFields(compulsoryFields, data, reject);
 
+    const headers = {
+      Authorization: Auth.basicAuthHeader(this.opts.secretKey),
+      'Content-Type': 'application/json',
+      'Idempotency-key': data.idempotencyKey,
+    };
+    if (data.apiVersion !== null) {
+      headers['Api-Version'] = data.apiVersion;
+    }
+
     fetchWithHTTPErr(`${this.API_ENDPOINT}/direct_debits`, {
       method: 'POST',
-      headers: {
-        Authorization: Auth.basicAuthHeader(this.opts.secretKey),
-        'Content-Type': 'application/json',
-        'Idempotency-key': data.idempotencyKey,
-      },
+      headers,
       body: JSON.stringify({
         reference_id: data.referenceID,
         payment_method_id: data.paymentMethodID,
@@ -58,14 +63,19 @@ function validateOTPforPayment(data) {
     const compulsoryFields = ['directDebitID', 'otpCode'];
     Validate.rejectOnMissingFields(compulsoryFields, data, reject);
 
+    const headers = {
+      Authorization: Auth.basicAuthHeader(this.opts.secretKey),
+      'Content-Type': 'application/json',
+    };
+    if (data.apiVersion !== null) {
+      headers['Api-Version'] = data.apiVersion;
+    }
+
     fetchWithHTTPErr(
       `${this.API_ENDPOINT}/direct_debits/${data.directDebitID}/validate_otp/`,
       {
         method: 'POST',
-        headers: {
-          Authorization: Auth.basicAuthHeader(this.opts.secretKey),
-          'Content-Type': 'application/json',
-        },
+        headers,
         body: JSON.stringify({
           otp_code: data.otpCode,
         }),