diff --git a/README.md b/README.md
index 509b96e..233da43 100644
--- a/README.md
+++ b/README.md
@@ -27,6 +27,11 @@ import mercadopago
 
 sdk = mercadopago.SDK("YOUR_ACCESS_TOKEN")
 
+request_options = mercadopago.config.RequestOptions()
+request_options.custom_headers = {
+    'x-idempotency-key': '<SOME_UNIQUE_VALUE>'
+}
+
 payment_data = {
     "transaction_amount": 100,
     "token": "CARD_TOKEN",
@@ -37,7 +42,7 @@ payment_data = {
         "email": 'test_user_123456@testuser.com'
     }
 }
-result = sdk.payment().create(payment_data)
+result = sdk.payment().create(payment_data, request_options)
 payment = result["response"]
 
 print(payment)