diff --git a/victoria-metrics/alertmanager.config.yml b/victoria-metrics/alertmanager.config.yml
index 2686554..1f64807 100644
--- a/victoria-metrics/alertmanager.config.yml
+++ b/victoria-metrics/alertmanager.config.yml
@@ -20,5 +20,5 @@ route:
   - receiver: ntfy
     matchers:
     - alertgroup=Frigate
-    group_by: alertname
-
+    group_by:
+    - alertname