diff --git a/conn.go b/conn.go
index 108750d..e9fb5c5 100644
--- a/conn.go
+++ b/conn.go
@@ -6,9 +6,13 @@ import (
 
 func rpc_server_conn(url ...string) (*ProductServiceClient, error) {
 
-	var rpc_url string = "127.0.0.1:" + conf.PRODUCT_RPC_PORT
+	var rpc_url string
 	if len(url) > 0 && url[0] != "" {
 		rpc_url = url[0]
+	} else if conf.PRODUCT_RPC_URL != "" {
+		rpc_url = conf.PRODUCT_RPC_URL
+	} else {
+		rpc_url = "127.0.0.1:" + conf.PRODUCT_RPC_PORT
 	}
 	conn, _, err := DialProductService("tcp", rpc_url)
 	if err != nil {