diff --git a/README.md b/README.md
index 8e3fe48..1b7b113 100755
--- a/README.md
+++ b/README.md
@@ -94,6 +94,10 @@ bash update-Nitrov3.sh
 | `NITRO_CLIENT_DIR` | `{nitro}/public/configuration` | Nitro client config directory |
 | `NITRO_CLIENT_SRC` | `/var/www/Nitro-V3` | Nitro-V3 source directory |
 | `NITRO_RENDERER_SRC` | `/var/www/Nitro_Render_V3` | Nitro Render V3 source directory |
+| `NITRO_BRANCH` | `main` | Git branch to checkout in all repos (`main` or `dev`) |
+| `NITRO_SITE_URL` | *prompted at runtime* | Base site URL — all Nitro URLs are derived from this automatically |
+
+> If `NITRO_SITE_URL` is not set in `.env`, the script prompts for it interactively at runtime, making it work on any VPS without manual URL configuration.
 
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