diff --git a/stripe-checkout/stripe-checkout.d.ts b/stripe-checkout/stripe-checkout.d.ts
index f648a1bb3..8be22cab1 100644
--- a/stripe-checkout/stripe-checkout.d.ts
+++ b/stripe-checkout/stripe-checkout.d.ts
@@ -15,12 +15,13 @@ interface StripeCheckoutHandler {
 }
 
 interface StripeCheckoutOptions {
-    key: string;
-    token: (token: StripeTokenResponse) => void;
+    key?: string;
+    token?: (token: StripeTokenResponse) => void;
     image?: string;
     name?: string;
     description?: string;
     amount?: number;
+    locale?: string;
     currency?: string;
     panelLabel?: string;
     zipCode?: boolean;
@@ -32,4 +33,4 @@ interface StripeCheckoutOptions {
     closed?: () => void;
 }
 
-declare var StripeCheckout: StripeCheckoutStatic;
\ No newline at end of file
+declare var StripeCheckout: StripeCheckoutStatic;