diff --git a/backend/instance/cookie_monitor.db b/backend/instance/cookie_monitor.db
index b1892c8..e232d41 100644
Binary files a/backend/instance/cookie_monitor.db and b/backend/instance/cookie_monitor.db differ
diff --git a/backend/models/database.py b/backend/models/database.py
index 1e600a3..22ea1b7 100644
--- a/backend/models/database.py
+++ b/backend/models/database.py
@@ -2,7 +2,7 @@
 数据库模型定义
 """
 from flask_sqlalchemy import SQLAlchemy
-from datetime import datetime
+from datetime import datetime, timezone
 
 db = SQLAlchemy()
 
@@ -18,8 +18,8 @@ class User(db.Model):
     cookie_cloud_uuid = db.Column(db.String(255))
     cookie_cloud_password = db.Column(db.String(255))
     cookie_cloud_api_url = db.Column(db.String(255))
-    created_at = db.Column(db.DateTime, default=datetime.utcnow)
-    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+    created_at = db.Column(db.DateTime(timezone=True), default=lambda: datetime.now(timezone.utc))
+    updated_at = db.Column(db.DateTime(timezone=True), default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
 
     # 关联关系
     websites = db.relationship('Website', backref='user', lazy=True, cascade='all, delete-orphan')
@@ -38,8 +38,8 @@ class Website(db.Model):
     success_text = db.Column(db.String(255))
     interval_minutes = db.Column(db.Integer, default=30, name='interval')
     status = db.Column(db.Integer, default=1)
-    created_at = db.Column(db.DateTime, default=datetime.utcnow)
-    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+    created_at = db.Column(db.DateTime(timezone=True), default=lambda: datetime.now(timezone.utc))
+    updated_at = db.Column(db.DateTime(timezone=True), default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
 
     # 关联关系
     cookies = db.relationship('Cookie', backref='website', lazy=True, cascade='all, delete-orphan')
@@ -60,8 +60,8 @@ class Cookie(db.Model):
     expiry = db.Column(db.DateTime)
     secure = db.Column(db.Integer, default=0)
     http_only = db.Column(db.Integer, default=0)
-    created_at = db.Column(db.DateTime, default=datetime.utcnow)
-    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+    created_at = db.Column(db.DateTime(timezone=True), default=lambda: datetime.now(timezone.utc))
+    updated_at = db.Column(db.DateTime(timezone=True), default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
 
 
 class Detection(db.Model):
@@ -74,7 +74,7 @@ class Detection(db.Model):
     response_time = db.Column(db.Float)
     http_status = db.Column(db.Integer)
     message = db.Column(db.Text)
-    created_at = db.Column(db.DateTime, default=datetime.utcnow)
+    created_at = db.Column(db.DateTime(timezone=True), default=lambda: datetime.now(timezone.utc))
 
 
 class Notification(db.Model):
@@ -88,5 +88,5 @@ class Notification(db.Model):
     content = db.Column(db.Text, nullable=False)
     status = db.Column(db.String(20), default='pending')
     send_time = db.Column(db.DateTime)
-    created_at = db.Column(db.DateTime, default=datetime.utcnow)
-    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+    created_at = db.Column(db.DateTime(timezone=True), default=lambda: datetime.now(timezone.utc))
+    updated_at = db.Column(db.DateTime(timezone=True), default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))