diff --git a/server/routes/detections.js b/server/routes/detections.js
index 6fb70d9..4511627 100644
--- a/server/routes/detections.js
+++ b/server/routes/detections.js
@@ -1,4 +1,5 @@
 const express = require('express');
+const { Op } = require('sequelize');
 const { DroneDetection, Device } = require('../models');
 const { authenticateToken } = require('../middleware/auth');
 const { getDroneTypeInfo } = require('../utils/droneTypes');
@@ -33,11 +34,11 @@ router.get('/', authenticateToken, async (req, res) => {
     }
     
     if (start_date) {
-      whereClause.server_timestamp = { ...whereClause.server_timestamp, gte: new Date(start_date) };
+      whereClause.server_timestamp = { ...whereClause.server_timestamp, [Op.gte]: new Date(start_date) };
     }
     
     if (end_date) {
-      whereClause.server_timestamp = { ...whereClause.server_timestamp, lte: new Date(end_date) };
+      whereClause.server_timestamp = { ...whereClause.server_timestamp, [Op.lte]: new Date(end_date) };
     }
 
     // Calculate offset for pagination