diff --git a/spec/definitions/BankCardDetails.yaml b/spec/definitions/BankCardDetails.yaml
index 475492f..aa1896c 100644
--- a/spec/definitions/BankCardDetails.yaml
+++ b/spec/definitions/BankCardDetails.yaml
@@ -17,3 +17,6 @@ properties:
   paymentSystem:
     x-rebillyMerge:
       - $ref: '#/definitions/BankCardPaymentSystem'
+  tokenProvider:
+    x-rebillyMerge:
+      - $ref: '#/definitions/BankCardTokenProvider'