diff --git a/graphql.go b/graphql.go
index 05c29b7..b4c647c 100644
--- a/graphql.go
+++ b/graphql.go
@@ -250,13 +250,18 @@ func ImmediatelyCloseReqBody() ClientOption {
 type ClientOption func(*Client)
 
 type graphErr struct {
-	Message string
+	Message         string
+	ErrorExtensions map[string]interface{} `json:"extensions"`
 }
 
 func (e graphErr) Error() string {
 	return "graphql: " + e.Message
 }
 
+func (e graphErr) Extensions() map[string]interface{} {
+	return e.ErrorExtensions
+}
+
 type graphResponse struct {
 	Data   interface{}
 	Errors []graphErr