diff --git a/scripts/change_url b/scripts/change_url
index dbe016e..acb24bf 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -139,6 +139,12 @@ ynh_script_progression --message="Reloading NGINX web server..." --time --weight
 
 ynh_systemd_action --service_name=nginx --action=reload
 
+#=================================================
+# SLACK WARNING
+#=================================================
+ynh_print_info --message="Don't forget to add a new redirction url in your Slack app settings !"
+
+
 #=================================================
 # END OF SCRIPT
 #=================================================