diff --git a/backend/src/models/Notification.js b/backend/src/models/Notification.js
index f3dab5a..6bba559 100644
--- a/backend/src/models/Notification.js
+++ b/backend/src/models/Notification.js
@@ -134,15 +134,16 @@ const Notification = sequelize.define('Notification', {
 }, {
   tableName: 'notifications',
   timestamps: true,
+  underscored: true,
   indexes: [
     {
-      fields: ['user_id', 'createdAt']
+      fields: ['user_id', 'created_at']
     },
     {
       fields: ['type', 'status']
     },
     {
-      fields: ['group_id', 'createdAt']
+      fields: ['group_id', 'created_at']
     },
     {
       fields: ['status', 'scheduled_for']
@@ -209,7 +210,7 @@ Notification.getRecent = async function(userId, limit = 20) {
   
   return await this.findAll({
     where: { user_id: userId },
-    order: [['createdAt', 'DESC']],
+    order: [['created_at', 'DESC']],
     limit: limit,
     include: [
       {