change go mod version
diff --git a/go.mod b/go.mod
index 1c1a607..9de398b 100644
--- a/go.mod
+++ b/go.mod
@@ -1,7 +1,7 @@
 module github.com/apache/dubbo-samples/golang
 
 require (
-	github.com/apache/dubbo-go v1.5.3-0.20201015161623-1268a960bc7b
+	github.com/apache/dubbo-go v1.5.3-0.20201015161623-1268a960bc7b // indirect
 	github.com/apache/dubbo-go-hessian2 v1.7.0
 	github.com/codahale/hdrhistogram v0.0.0-20161010025455-3a0bb77429bd // indirect
 	github.com/dubbogo/gost v1.9.2