diff --git a/backend/api/anomaly/logs.get.ts b/backend/api/anomaly/logs.get.ts
index 8152c8e..7124a7c 100644
--- a/backend/api/anomaly/logs.get.ts
+++ b/backend/api/anomaly/logs.get.ts
@@ -23,7 +23,7 @@ export default defineEventHandler(async (event) => {
              current_value, threshold_value, message, detected_at
       FROM anomaly_logs
       WHERE detect_type = $1
-        AND detected_at >= NOW() - INTERVAL '${interval}'
+        AND detected_at::timestamp >= NOW() - INTERVAL '${interval}'
       ORDER BY detected_at DESC
       LIMIT 100
     `, [type])