diff --git a/go/types.go b/go/types.go
index 965b326ef6..97ae1fdc1d 100644
--- a/go/types.go
+++ b/go/types.go
@@ -81,22 +81,24 @@ type (
 // VerifyResponse contains the verification result
 // If verification fails, an error (typically *VerifyError) is returned and this will be nil
 type VerifyResponse struct {
-	IsValid        bool   `json:"isValid"`
-	InvalidReason  string `json:"invalidReason,omitempty"`
-	InvalidMessage string `json:"invalidMessage,omitempty"`
-	Payer          string `json:"payer,omitempty"`
+	IsValid        bool                   `json:"isValid"`
+	InvalidReason  string                 `json:"invalidReason,omitempty"`
+	InvalidMessage string                 `json:"invalidMessage,omitempty"`
+	Payer          string                 `json:"payer,omitempty"`
+	Extensions     map[string]interface{} `json:"extensions,omitempty"`
 }
 
 // SettleResponse contains the settlement result
 // If settlement fails, an error (typically *SettleError) is returned and this will be nil
 type SettleResponse struct {
-	Success      bool    `json:"success"`
-	ErrorReason  string  `json:"errorReason,omitempty"`
-	ErrorMessage string  `json:"errorMessage,omitempty"`
-	Payer        string  `json:"payer,omitempty"`
-	Transaction  string  `json:"transaction"`
-	Network      Network `json:"network"`
-	Amount       string  `json:"amount,omitempty"`
+	Success      bool                   `json:"success"`
+	ErrorReason  string                 `json:"errorReason,omitempty"`
+	ErrorMessage string                 `json:"errorMessage,omitempty"`
+	Payer        string                 `json:"payer,omitempty"`
+	Transaction  string                 `json:"transaction"`
+	Network      Network                `json:"network"`
+	Amount       string                 `json:"amount,omitempty"`
+	Extensions   map[string]interface{} `json:"extensions,omitempty"`
 }
 
 // SettlementOverrides allows overriding settlement parameters.