diff --git a/appstore/model.go b/appstore/model.go
index 624063d..677e701 100644
--- a/appstore/model.go
+++ b/appstore/model.go
@@ -104,7 +104,6 @@ type (
 
 		CancellationDate
 		CancellationReason string `json:"cancellation_reason,omitempty"`
-		IsUpgraded         string `json:"is_upgraded,omitempty"`
 	}
 
 	// The Receipt type has whole data of receipt