diff --git a/ghost/portal/src/utils/api.js b/ghost/portal/src/utils/api.js
index 15cb442b34..11a01fd932 100644
--- a/ghost/portal/src/utils/api.js
+++ b/ghost/portal/src/utils/api.js
@@ -392,6 +392,9 @@ function setupGhostApi({siteUrl = window.location.origin, apiUrl, apiKey}) {
                 }
                 return res.json();
             }).then(function (result) {
+                if (result.url) {
+                    return window.location.assign(result.url);
+                }
                 const stripe = window.Stripe(result.publicKey);
                 return stripe.redirectToCheckout({
                     sessionId: result.sessionId