diff --git a/backend/app/core/security.py b/backend/app/core/security.py
index 20b1c95..b98db50 100644
--- a/backend/app/core/security.py
+++ b/backend/app/core/security.py
@@ -1,7 +1,7 @@
 import jwt
 from fastapi.security import OAuth2PasswordBearer
 from passlib.context import CryptContext
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta,timezone
 from cryptography.hazmat.primitives.ciphers import Cipher, algorithms
 import os
 import base64
@@ -27,9 +27,9 @@ def verify_password(plain_password: str, hashed_password: str) -> bool:
 def create_access_token(*, data: dict, expires_delta: timedelta = None):
     to_encode = data.copy()
     if expires_delta:
-        expire = datetime.utcnow() + expires_delta
+        expire = datetime.now(timezone.utc) + expires_delta
     else:
-        expire = datetime.utcnow() + timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
+        expire = datetime.now(timezone.utc) + timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
     to_encode.update({"exp": expire})
     encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
     return encoded_jwt
diff --git a/backend/app/db/models.py b/backend/app/db/models.py
index 04ba1e3..f53a6a6 100644
--- a/backend/app/db/models.py
+++ b/backend/app/db/models.py
@@ -1,5 +1,5 @@
 from sqlalchemy import Boolean, Column, Integer, String, DateTime,ForeignKey,Table
-from sqlalchemy.orm import relationship,as_declarative
+from sqlalchemy.orm import Mapped,relationship,as_declarative,mapped_column
 from datetime import datetime
 from app.db.session import Base
 from app.core.security import chacha20Decrypt
@@ -28,14 +28,14 @@ rolepermission = Table(
 class User(Base):
     __tablename__ = "user"
 
-    email = Column(String(50), unique=True, index=True, nullable=False)
-    first_name = Column(String(100))
-    last_name = Column(String(100))
-    hashed_password = Column(String(200), nullable=False)
-    is_active = Column(Boolean, default=True)
-    is_superuser = Column(Boolean, default=False)
-    createuserid = Column(Integer,ForeignKey("user.id"))
-    updateuserid = Column(Integer,ForeignKey("user.id"))
+    email = mapped_column(String(50), unique=True, index=True, nullable=False)
+    first_name = mapped_column(String(100))
+    last_name = mapped_column(String(100))
+    hashed_password = mapped_column(String(200), nullable=False)
+    is_active = mapped_column(Boolean, default=True)
+    is_superuser = mapped_column(Boolean, default=False)
+    createuserid = mapped_column(Integer,ForeignKey("user.id"))
+    updateuserid = mapped_column(Integer,ForeignKey("user.id"))
     createuser = relationship('User',foreign_keys=[createuserid]) 
     updateuser = relationship('User',foreign_keys=[updateuserid]) 
     roles = relationship("Role",secondary=userrole,back_populates="users")
@@ -44,44 +44,44 @@ class User(Base):
 class Role(Base):
     __tablename__ = "role"
 
-    name = Column(String(100))
-    description = Column(String(255))
-    level = Column(Integer)
+    name = mapped_column(String(100))
+    description = mapped_column(String(255))
+    level = mapped_column(Integer)
     users = relationship("User",secondary=userrole,back_populates="roles")
     permissions = relationship("Permission",secondary=rolepermission,back_populates="roles")
 
 class Permission(Base):
     __tablename__ = "permission"
 
-    menu = Column(String(100))
-    function = Column(String(255))
-    privilege = Column(String(100))
+    menu = mapped_column(String(100))
+    function = mapped_column(String(255))
+    privilege = mapped_column(String(100))
     roles = relationship("Role",secondary=rolepermission,back_populates="permissions")
 
 
 class App(Base):
     __tablename__ = "app"
 
-    domainurl = Column(String(200), nullable=False) 
-    appname = Column(String(200), nullable=False)
-    appid = Column(String(100), index=True, nullable=False)
-    version = Column(Integer)
-    createuserid = Column(Integer,ForeignKey("user.id"))
-    updateuserid = Column(Integer,ForeignKey("user.id"))
+    domainurl = mapped_column(String(200), nullable=False) 
+    appname = mapped_column(String(200), nullable=False)
+    appid = mapped_column(String(100), index=True, nullable=False)
+    version = mapped_column(Integer)
+    createuserid = mapped_column(Integer,ForeignKey("user.id"))
+    updateuserid = mapped_column(Integer,ForeignKey("user.id"))
     createuser = relationship('User',foreign_keys=[createuserid]) 
     updateuser = relationship('User',foreign_keys=[updateuserid]) 
 
 class AppVersion(Base):
     __tablename__ = "appversion"
 
-    domainurl = Column(String(200), nullable=False) 
-    appname = Column(String(200), nullable=False)
-    appid = Column(String(100), index=True, nullable=False)
-    version = Column(Integer)
-    versionname = Column(String(200), nullable=False)
-    comment = Column(String(200), nullable=False)
-    createuserid = Column(Integer,ForeignKey("user.id"))
-    updateuserid = Column(Integer,ForeignKey("user.id"))
+    domainurl = mapped_column(String(200), nullable=False) 
+    appname = mapped_column(String(200), nullable=False)
+    appid = mapped_column(String(100), index=True, nullable=False)
+    version = mapped_column(Integer)
+    versionname = mapped_column(String(200), nullable=False)
+    comment = mapped_column(String(200), nullable=False)
+    createuserid = mapped_column(Integer,ForeignKey("user.id"))
+    updateuserid = mapped_column(Integer,ForeignKey("user.id"))
     createuser = relationship('User',foreign_keys=[createuserid]) 
     updateuser = relationship('User',foreign_keys=[updateuserid]) 
 
@@ -89,82 +89,82 @@ class AppVersion(Base):
 class AppSetting(Base):
     __tablename__ = "appsetting"
 
-    appid = Column(String(100), index=True, nullable=False)
-    setting = Column(String(1000))   
+    appid = mapped_column(String(100), index=True, nullable=False)
+    setting = mapped_column(String(1000))   
 
 class Kintone(Base):
     __tablename__ = "kintone"
 
-    type = Column(Integer, index=True, nullable=False)
-    name = Column(String(100), nullable=False)   
-    desc = Column(String)
-    content = Column(String)
+    type = mapped_column(Integer, index=True, nullable=False)
+    name = mapped_column(String(100), nullable=False)   
+    desc = mapped_column(String)
+    content = mapped_column(String)
 
 class Action(Base):
     __tablename__ = "action"
 
-    name = Column(String(100), index=True, nullable=False)
-    title = Column(String(200))   
-    subtitle = Column(String(500))   
-    outputpoints = Column(String)
-    property =  Column(String)
-    categoryid = Column(Integer,ForeignKey("category.id"))
-    nosort = Column(Integer)
+    name = mapped_column(String(100), index=True, nullable=False)
+    title = mapped_column(String(200))   
+    subtitle = mapped_column(String(500))   
+    outputpoints = mapped_column(String)
+    property =  mapped_column(String)
+    categoryid = mapped_column(Integer,ForeignKey("category.id"))
+    nosort = mapped_column(Integer)
 
 class Flow(Base):
     __tablename__ = "flow"
 
-    flowid = Column(String(100), index=True, nullable=False)
-    appid = Column(String(100), index=True, nullable=False)
-    eventid = Column(String(100), index=True, nullable=False)
-    domainurl = Column(String(200)) 
-    name = Column(String(200))   
-    content = Column(String) 
-    createuserid = Column(Integer,ForeignKey("user.id"))
-    updateuserid = Column(Integer,ForeignKey("user.id"))
+    flowid = mapped_column(String(100), index=True, nullable=False)
+    appid = mapped_column(String(100), index=True, nullable=False)
+    eventid = mapped_column(String(100), index=True, nullable=False)
+    domainurl = mapped_column(String(200)) 
+    name = mapped_column(String(200))   
+    content = mapped_column(String) 
+    createuserid = mapped_column(Integer,ForeignKey("user.id"))
+    updateuserid = mapped_column(Integer,ForeignKey("user.id"))
     createuser = relationship('User',foreign_keys=[createuserid]) 
     updateuser = relationship('User',foreign_keys=[updateuserid]) 
 
 class FlowHistory(Base):
     __tablename__ = "flowhistory"
 
-    flowid = Column(String(100), index=True, nullable=False)
-    appid = Column(String(100), index=True, nullable=False)
-    eventid = Column(String(100), index=True, nullable=False)
-    domainurl = Column(String(200)) 
-    name = Column(String(200))   
-    content = Column(String)  
-    version = Column(Integer)
-    createuserid = Column(Integer,ForeignKey("user.id"))
-    updateuserid = Column(Integer,ForeignKey("user.id"))
+    flowid = mapped_column(String(100), index=True, nullable=False)
+    appid = mapped_column(String(100), index=True, nullable=False)
+    eventid = mapped_column(String(100), index=True, nullable=False)
+    domainurl = mapped_column(String(200)) 
+    name = mapped_column(String(200))   
+    content = mapped_column(String)  
+    version = mapped_column(Integer)
+    createuserid = mapped_column(Integer,ForeignKey("user.id"))
+    updateuserid = mapped_column(Integer,ForeignKey("user.id"))
     createuser = relationship('User',foreign_keys=[createuserid]) 
     updateuser = relationship('User',foreign_keys=[updateuserid]) 
 
 class Tenant(Base):
     __tablename__ = "tenant"
 
-    tenantid =  Column(String(100), index=True, nullable=False)
-    name = Column(String(200)) 
-    licence  = Column(String(200)) 
-    startdate = Column(DateTime)
-    enddate = Column(DateTime) 
+    tenantid =  mapped_column(String(100), index=True, nullable=False)
+    name = mapped_column(String(200)) 
+    licence  = mapped_column(String(200)) 
+    startdate = mapped_column(DateTime)
+    enddate = mapped_column(DateTime) 
 
 
 class Domain(Base):
     __tablename__ = "domain"
 
-    tenantid =  Column(String(100), index=True, nullable=False)
-    name = Column(String(100), nullable=False)   
-    url = Column(String(200), nullable=False)
-    kintoneuser = Column(String(100), nullable=False)
-    kintonepwd = Column(String(100), nullable=False)
-    is_active = Column(Boolean, default=True)
+    tenantid =  mapped_column(String(100), index=True, nullable=False)
+    name = mapped_column(String(100), nullable=False)   
+    url = mapped_column(String(200), nullable=False)
+    kintoneuser = mapped_column(String(100), nullable=False)
+    kintonepwd = mapped_column(String(100), nullable=False)
+    is_active = mapped_column(Boolean, default=True)
     def decrypt_kintonepwd(self):
         decrypted_pwd = chacha20Decrypt(self.kintonepwd)
         return decrypted_pwd
-    createuserid = Column(Integer,ForeignKey("user.id"))
-    updateuserid = Column(Integer,ForeignKey("user.id"))
-    ownerid = Column(Integer,ForeignKey("user.id"))
+    createuserid = mapped_column(Integer,ForeignKey("user.id"))
+    updateuserid = mapped_column(Integer,ForeignKey("user.id"))
+    ownerid = mapped_column(Integer,ForeignKey("user.id"))
     createuser = relationship('User',foreign_keys=[createuserid]) 
     updateuser = relationship('User',foreign_keys=[updateuserid]) 
     owner = relationship('User',foreign_keys=[ownerid]) 
@@ -173,11 +173,11 @@ class Domain(Base):
 class UserDomain(Base):
     __tablename__ = "userdomain"
 
-    userid = Column(Integer,ForeignKey("user.id"))
-    domainid = Column(Integer,ForeignKey("domain.id"))
-    is_default = Column(Boolean, default=False)
-    createuserid = Column(Integer,ForeignKey("user.id"))
-    updateuserid = Column(Integer,ForeignKey("user.id"))
+    userid = mapped_column(Integer,ForeignKey("user.id"))
+    domainid = mapped_column(Integer,ForeignKey("domain.id"))
+    is_default = mapped_column(Boolean, default=False)
+    createuserid = mapped_column(Integer,ForeignKey("user.id"))
+    updateuserid = mapped_column(Integer,ForeignKey("user.id"))
     domain = relationship("Domain")
     user = relationship("User",foreign_keys=[userid])
     createuser = relationship('User',foreign_keys=[createuserid]) 
@@ -186,51 +186,51 @@ class UserDomain(Base):
 class Event(Base):
     __tablename__ = "event"
 
-    category = Column(String(100), nullable=False)
-    type = Column(String(100), nullable=False)
-    eventid= Column(String(100), nullable=False)
-    function = Column(String(500), nullable=False)   
-    mobile = Column(Boolean, default=False)
-    eventgroup = Column(Boolean, default=False)
+    category = mapped_column(String(100), nullable=False)
+    type = mapped_column(String(100), nullable=False)
+    eventid= mapped_column(String(100), nullable=False)
+    function = mapped_column(String(500), nullable=False)   
+    mobile = mapped_column(Boolean, default=False)
+    eventgroup = mapped_column(Boolean, default=False)
 
 class EventAction(Base):
     __tablename__ = "eventaction"
 
-    eventid = Column(String(100),ForeignKey("event.eventid"))
-    actionid = Column(Integer,ForeignKey("action.id"))
+    eventid = mapped_column(String(100),ForeignKey("event.eventid"))
+    actionid = mapped_column(Integer,ForeignKey("action.id"))
 
 
 class ErrorLog(Base):
        __tablename__ = "errorlog"
 
-       title = Column(String(50))
-       location = Column(String(500))
-       content = Column(String(5000))
+       title = mapped_column(String(50))
+       location = mapped_column(String(500))
+       content = mapped_column(String(5000))
 
 class OperationLog(Base):
        __tablename__ = "operationlog"
 
-       tenantid =  Column(String(100))
-       domainurl = Column(String(200))
-       userid = Column(Integer,ForeignKey("user.id"))
-       operation = Column(String(200))
-       function = Column(String(200))
-       detail = Column(String(200))
+       tenantid =  mapped_column(String(100))
+       domainurl = mapped_column(String(200))
+       userid = mapped_column(Integer,ForeignKey("user.id"))
+       operation = mapped_column(String(200))
+       function = mapped_column(String(200))
+       detail = mapped_column(String(200))
        user = relationship('User')
 
 class KintoneFormat(Base):
       __tablename__ = "kintoneformat"
 
-      name = Column(String(50))
-      startrow =Column(Integer)
-      startcolumn =Column(Integer)
-      typecolumn =Column(Integer)
-      codecolumn =Column(Integer)
-      field = Column(String(5000))
-      trueformat = Column(String(10))
+      name = mapped_column(String(50))
+      startrow =mapped_column(Integer)
+      startmapped_column =mapped_column(Integer)
+      typemapped_column =mapped_column(Integer)
+      codemapped_column =mapped_column(Integer)
+      field = mapped_column(String(5000))
+      trueformat = mapped_column(String(10))
 
 class Category(Base):
     __tablename__ = "category"
 
-    categoryname = Column(String(20))
-    nosort = Column(Integer)
\ No newline at end of file
+    categoryname = mapped_column(String(20))
+    nosort = mapped_column(Integer)
\ No newline at end of file