diff --git a/README.md b/README.md
index c679d3be1..06c4488ed 100644
--- a/README.md
+++ b/README.md
@@ -51,6 +51,9 @@ There are two environment variables available for configuration:
 - `APP_MOUNT_URI` - URI at which the Dashboard app will be mounted.
   E.g. if you set `APP_MOUNT_URI` to `/dashboard/`, your app will be mounted at `http://localhost:9000/dashboard/`.
 
+- `STATIC_URL` - URL where the static files are located.
+  E.g. if you use S3 bucket, you should set it to the bucket's URL. By default Saleor assumes you serve static files from the root of your site at `http://localhost:9000/`.
+
 ### Development
 
 To start the development server run: