diff --git a/README.md b/README.md
index 11f0ff9..5968b3b 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,8 @@ Create a file named `.env.local` in the current directory and copy the contents
 NEXT_PUBLIC_APP_ID=
 # APP API key
 NEXT_PUBLIC_APP_KEY=
+# APP URL
+NEXT_PUBLIC_API_URL=
 ```
 
 Config more in `config/index.ts` file: