diff --git a/default/cloudnative-pg/cluster/prometheusrule.yaml b/default/cloudnative-pg/cluster/prometheusrule.yaml
index d69e103f205..69908de1401 100644
--- a/default/cloudnative-pg/cluster/prometheusrule.yaml
+++ b/default/cloudnative-pg/cluster/prometheusrule.yaml
@@ -31,10 +31,10 @@ spec:
             severity: warning
         - alert: PGDatabase
           annotations:
-            description: Over 150,000,000 transactions from frozen xid on pod {{ $labels.pod  }}
+            description: Over 300,000,000 transactions from frozen xid on pod {{ $labels.pod  }}
             summary: Number of transactions from the frozen XID to the current one
           expr: |-
-            cnpg_pg_database_xid_age > 150000000
+            cnpg_pg_database_xid_age > 300000000
           for: 1m
           labels:
             severity: warning