diff --git a/src/PaymentServer/Processors/Stripe.hs b/src/PaymentServer/Processors/Stripe.hs
index 66efadcd22f88ecd4faf6221644d4849326242ae..25a63fe31ded132044a8e051177a9db2a979b278 100644
--- a/src/PaymentServer/Processors/Stripe.hs
+++ b/src/PaymentServer/Processors/Stripe.hs
@@ -92,7 +92,9 @@ type StripeSecretKey = ByteString
 data Acknowledgement = Ok
 
 instance ToJSON Acknowledgement where
-  toJSON Ok = object []
+  toJSON Ok = object
+    [ "success" .= True
+    ]
 
 type StripeAPI = ChargesAPI