diff --git a/README.md b/README.md
index 6eac74b..135ad8f 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,4 @@
 # lightdm-wallpaper-changer
-A script that changes your Light Display Manager's background image. 
+A script that changes your Light Display Manager's background image.
+
+The script is run by the same systemd service that starts LightDM. Just edit your `lightdm.service` by making it execute the `LDM-Wallpaper.sh` script or you can just copy the included `lightdm.service` file to `/etc/systemd/system`