diff --git a/README.md b/README.md
index d532827..c0d3e8f 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,8 @@ pnpm install
 2. Update `CALLBACK_SERVER_URL` and `JOYID_APP_URL` in `env/index.ts`
 
 > The `CALLBACK_SERVER_URL` is your own server url like the `https://api.example.com/bot/api/v1/` and the more information is provided below.
+> 
+> The `JOYID_APP_URL` is the joyid wallet app url, please set to https://testnet.joyid.dev for staging env, or https://app.joy.id for product env.
 
 3. Build and Test
 
@@ -152,4 +154,4 @@ The message format is JSON string and this mini app demo message is defined as f
 - Reject
 ```json
 "message": "{\"txHash\":\"rejected\"}"
-```
\ No newline at end of file
+```