diff --git a/pkg/util/vhost/http.go b/pkg/util/vhost/http.go
index 05ec174b..7be0970d 100644
--- a/pkg/util/vhost/http.go
+++ b/pkg/util/vhost/http.go
@@ -136,7 +136,7 @@ func NewHTTPReverseProxy(option HTTPReverseProxyOptions, vhostRouter *Routers) *
 					return
 				}
 			}
-			rw.WriteHeader(http.StatusNotFound)
+			rw.WriteHeader(http.StatusBadGateway)
 			_, _ = rw.Write(getNotFoundPageContent())
 		},
 	}