diff --git a/migrate2rocky/README.md b/migrate2rocky/README.md
index 25530d7..f8d47a5 100644
--- a/migrate2rocky/README.md
+++ b/migrate2rocky/README.md
@@ -13,6 +13,14 @@ Running this script will convert an existing CentOS 8 system to Rocky Linux 8.
 
 [!! USE WITH CAUTION !!]
 ```
+#### Use Mirror URLs of Rocky Linux
+
+```bash
+export ROCKY_LINUX_ENV_MIRROR_URL="https://mirrors.example.org/rocky"
+
+./migrate2rocky.sh -r
+```
+
 
 ### Known Issues