diff --git a/scripts/change_url b/scripts/change_url
index 1fdf39e..f77be7b 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -69,7 +69,7 @@ fi
 #=================================================
 ynh_script_progression --message="Stopping a systemd service..." --time --weight=1
 
-ynh_systemd_action --service_name=$app --action="stop" --line_match="Stopped WireGuard UI" --log_path="systemd" --timeout=30
+ynh_systemd_action --service_name=wireguard_ui --action="stop" --line_match="Stopped WireGuard UI" --log_path="systemd" --timeout=30
 
 #=================================================
 # MODIFY URL IN NGINX CONF
@@ -113,7 +113,7 @@ fi
 #=================================================
 ynh_script_progression --message="Starting a systemd service..." --time --weight=1
 
-ynh_systemd_action --service_name=$app --action="start" --line_match="http server started" --log_path="systemd" --timeout=30
+ynh_systemd_action --service_name=wireguard_ui --action="start" --line_match="http server started" --log_path="systemd" --timeout=30
 
 #=================================================
 # RELOAD NGINX