diff --git a/tf/modules/CHANGELOG.md b/tf/modules/CHANGELOG.md
index 0442a6642..449675aca 100644
--- a/tf/modules/CHANGELOG.md
+++ b/tf/modules/CHANGELOG.md
@@ -1,3 +1,6 @@
+# tf-module-monitoring-23
+- Attempt to fix logical SQL backup alerting policy (alignment period 1h -> 15m)
+
 # tf-module-monitoring-22
 - Improve logical SQL backup alerting policy (alignment period 60s -> 1h)
 
diff --git a/tf/modules/monitoring/sql-backup-failure-alert.tf b/tf/modules/monitoring/sql-backup-failure-alert.tf
index 3809aa54e..fce9cc4b7 100644
--- a/tf/modules/monitoring/sql-backup-failure-alert.tf
+++ b/tf/modules/monitoring/sql-backup-failure-alert.tf
@@ -28,7 +28,7 @@ resource "google_monitoring_alert_policy" "alert_policy_sql_logical_backup_failu
       aggregations {
         cross_series_reducer = "REDUCE_COUNT"
         per_series_aligner   = "ALIGN_COUNT"
-        alignment_period     = "3600s"
+        alignment_period     = "900s"
         group_by_fields = [
           "resource.labels.container_name",
         ]