diff --git a/site-cookbooks/kosmos_prometheus/files/default/rules/node_exporter.yml b/site-cookbooks/kosmos_prometheus/files/default/rules/node_exporter.yml
index b3ffbb1..b80cef4 100644
--- a/site-cookbooks/kosmos_prometheus/files/default/rules/node_exporter.yml
+++ b/site-cookbooks/kosmos_prometheus/files/default/rules/node_exporter.yml
@@ -3,7 +3,7 @@ groups:
     rules:
       - alert: NodeDown
         expr: up{job="node"} == 0
-        for: 10s
+        for: 20s
         labels:
           severity: warning
         annotations: