diff --git a/lib/constructs/backup-verification.ts b/lib/constructs/backup-verification.ts
index 64106da..dc4a3de 100644
--- a/lib/constructs/backup-verification.ts
+++ b/lib/constructs/backup-verification.ts
@@ -1,4 +1,5 @@
 import * as cdk from "aws-cdk-lib";
+import * as cloudwatch from "aws-cdk-lib/aws-cloudwatch";
 import * as events from "aws-cdk-lib/aws-events";
 import * as events_targets from "aws-cdk-lib/aws-events-targets";
 import * as iam from "aws-cdk-lib/aws-iam";
@@ -95,5 +96,15 @@ export class BackupVerification extends Construct {
         }),
       ],
     });
+
+    new cloudwatch.Alarm(this, "ErrorAlarm", {
+      alarmName: "forgejo-backup-verification-errors",
+      alarmDescription: "Backup verification Lambda is failing — Slack notifications may not be firing",
+      metric: fn.metricErrors({ period: cdk.Duration.hours(1) }),
+      threshold: 1,
+      evaluationPeriods: 1,
+      treatMissingData: cloudwatch.TreatMissingData.BREACHING,
+      comparisonOperator: cloudwatch.ComparisonOperator.GREATER_THAN_OR_EQUAL_TO_THRESHOLD,
+    });
   }
 }