diff --git a/core/service.go b/core/service.go
index f625596..1d5699c 100644
--- a/core/service.go
+++ b/core/service.go
@@ -688,8 +688,8 @@ func (sh *serviceDescription) authorize(w http.ResponseWriter, r *http.Request)
 			return
 		}
 		if link["_ts"] != nil {
-			delts := link["_ts"].(primitive.Timestamp)
-			if !delts.IsZero() {
+			delts := link["_ts"].(primitive.DateTime)
+			if !delts.Time().IsZero() {
 				// 삭제된 계정. 삭제 되었다고 알려주자
 				w.Header().Add("MG-ACCOUNT-DELETED", "TRUE")
 				w.WriteHeader(http.StatusUnauthorized)