diff --git a/jwthenticator/models.py b/jwthenticator/models.py
index 240a0c5..6707077 100644
--- a/jwthenticator/models.py
+++ b/jwthenticator/models.py
@@ -1,79 +1,65 @@
 # pylint: disable=too-few-public-methods
 from __future__ import absolute_import
 
-from typing import Any
-
-from sqlalchemy import create_engine, Column, Integer, String, DateTime, ForeignKey
-from sqlalchemy.orm import sessionmaker, declarative_base
+from datetime import datetime, timezone
+from sqlalchemy import create_engine, Integer, String, DateTime, ForeignKey
+from sqlalchemy.orm import sessionmaker, DeclarativeBase, mapped_column
 from sqlalchemy_utils import database_exists, create_database
 from sqlalchemy_utils.types.uuid import UUIDType
-from sqlalchemy.ext.hybrid import hybrid_property
-from datetime import datetime, timezone
 from jwthenticator.consts import DB_URI
 from jwthenticator.utils import utcnow
 
 engine = create_engine(DB_URI)
 SessionMaker = sessionmaker(bind=engine)
 
-Base = declarative_base()   # type: Any # pylint: disable=invalid-name
-
-
-class KeyInfo(Base):
-    __tablename__ = "keys"
-    id = Column(Integer, primary_key=True, autoincrement=True)
-    _created = Column("created", DateTime, default=utcnow())
-    expires_at = Column(DateTime)
-    key_hash = Column(String(256), unique=True)
-    identifier = Column(UUIDType(binary=False), nullable=False) # type: ignore
-
-    @hybrid_property
-    def created(self):
-        if self._created and self._created.tzinfo is None:
-            return self._created.replace(tzinfo=timezone.utc)
-        return self._created
-
-    @created.setter
-    def created(self, created: datetime):
-        if created and created.tzinfo:
-            self._created = created.astimezone(timezone.utc).replace(tzinfo=None)
-        else:
-            self._created = created
-    
 
-class RefreshTokenInfo(Base):
-    __tablename__ = "refresh_tokens"
-    id = Column(Integer, primary_key=True, autoincrement=True)
-    _created = Column("created", DateTime, default=utcnow())
-    _expires_at = Column("expires_at", DateTime)
-    token = Column(String(512))
-    key_id = Column(Integer, ForeignKey("keys.id"))
+class DateTimeMixin:
+    _created = mapped_column("created", DateTime, default=utcnow().replace(tzinfo=None))
+    _expires_at = mapped_column("expires_at", DateTime)
 
-    @hybrid_property
-    def created(self):
+    @property
+    def created(self)-> datetime:
         if self._created and self._created.tzinfo is None:
             return self._created.replace(tzinfo=timezone.utc)
         return self._created
 
     @created.setter
-    def created(self, created: datetime):
+    def created(self, created: datetime)-> None:
         if created and created.tzinfo:
             self._created = created.astimezone(timezone.utc).replace(tzinfo=None)
         else:
             self._created = created
 
-    @hybrid_property
-    def expires_at(self):
+    @property
+    def expires_at(self)-> datetime:
         if self._expires_at and self._expires_at.tzinfo is None:
             return self._expires_at.replace(tzinfo=timezone.utc)
         return self._expires_at
 
     @expires_at.setter
-    def expires_at(self, expires_at: datetime):
+    def expires_at(self, expires_at: datetime)-> None:
         if expires_at and expires_at.tzinfo:
             self._expires_at = expires_at.astimezone(timezone.utc).replace(tzinfo=None)
         else:
             self._expires_at = expires_at
 
+class Base(DeclarativeBase, DateTimeMixin):
+    pass
+
+class KeyInfo(Base):
+    __tablename__ = "keys"
+    id = mapped_column(Integer, primary_key=True, autoincrement=True)
+    key_hash = mapped_column(String(256), unique=True)
+    identifier = mapped_column(UUIDType(binary=False), nullable=False) # type: ignore
+
+
+class RefreshTokenInfo(Base):
+    __tablename__ = "refresh_tokens"
+    id = mapped_column(Integer, primary_key=True, autoincrement=True)
+    token = mapped_column(String(512))
+    key_id = mapped_column(Integer, ForeignKey("keys.id"))
+
+
 # Create database + tables
 if not database_exists(DB_URI):
     create_database(DB_URI)