diff --git a/wshandler/wshandler.go b/wshandler/wshandler.go
index c51ebb4..58f54b8 100644
--- a/wshandler/wshandler.go
+++ b/wshandler/wshandler.go
@@ -32,11 +32,13 @@ type UpstreamMessage struct {
 	Accid  primitive.ObjectID
 	Target string
 	Body   []byte
+	Tag    []string
 }
 
 type DownstreamMessage struct {
-	Alias string
-	Body  string
+	Alias string   `json:",omitempty"`
+	Body  string   `json:",omitempty"`
+	Tag   []string `json:",omitempty"`
 }
 
 type commandType string