diff --git a/api.md b/api.md
index 0b6dcb7..eb96adc 100644
--- a/api.md
+++ b/api.md
@@ -26,7 +26,7 @@ govendor fetch github.com/Conflux-Chain/go-conflux-sdk
 
 After that you need to create a client instance with node url and an account manager instance.
 ```go
-url:= "http://testnet-jsonrpc.conflux-chain.org:12537"
+url:= "https://test.confluxrpc.org"
 client, err := sdk.NewClient(url)
 if err != nil {
 	fmt.Println("new client error:", err)