diff --git a/types/2019-12-03/Tokens.d.ts b/types/2019-12-03/Tokens.d.ts
index ef9702a695..13fda66a40 100644
--- a/types/2019-12-03/Tokens.d.ts
+++ b/types/2019-12-03/Tokens.d.ts
@@ -53,7 +53,7 @@ declare module 'stripe' {
       /**
        * The bank account this token will represent.
        */
-      bank_account?: TokenCreateParams.BankAccount;
+      bank_account?: string | TokenCreateParams.BankAccount;
 
       card?: string | TokenCreateParams.Card;