diff --git a/server/src/api/validation/monitorValidation.ts b/server/src/api/validation/monitorValidation.ts
index f44cc88ae..2dfee1239 100644
--- a/server/src/api/validation/monitorValidation.ts
+++ b/server/src/api/validation/monitorValidation.ts
@@ -272,5 +272,6 @@ export const monitorResponseSchema = z
 		userId: z.string(),
 		createdAt: z.string(),
 		updatedAt: z.string(),
+		lastEvaluatedAt: z.number(),
 	})
 	.passthrough();