diff --git a/README.md b/README.md
index f8677cc..6178f2e 100644
--- a/README.md
+++ b/README.md
@@ -39,6 +39,8 @@ system.autoUpgrade = {
     updateFlake = true;
     failureNotification = {
       enable = true;
+
+      # NTFY_URL=https://ntfy.example.com/topic
       ntfyUrlFile = "/etc/secrets/failureNotification.env";
     };
 };