diff --git a/examples/voucherify_test.py b/examples/voucherify_test.py
index 21f593f3..d7db979d 100644
--- a/examples/voucherify_test.py
+++ b/examples/voucherify_test.py
@@ -91,7 +91,7 @@
 
 pprint.pprint("=== Redeem Voucher with Customer Info ===")
 customer = {
-    "id": "alice.morgan",
+    "source_id": "alice.morgan",
     "name": "Alice Morgan",
     "email": "alice@morgan.com",
     "description": "",