diff --git a/readme.md b/readme.md
index 5a9b8718e5f93f3eeff9161c32dae17a02abf4bc..292c98f2679437614dae81968ef71f3cbcab8faa 100644
--- a/readme.md
+++ b/readme.md
@@ -296,9 +296,9 @@ wget https://github.com/prometheus/alertmanager/releases/download/v0.23.0/alertm
       routes:
         # database alert group by instance, server
         - receiver: 'snmp_notifier'
-        group_by: [instance, server]
-        group_wait: 10s
-        matchers:
+          group_by: [instance, server]
+          group_wait: 10s
+          matchers:
           - service=~"MogDB"
     receivers:
     - name: 'snmp_notifier'