diff --git a/app/models/user.py b/app/models/user.py
index 4796811..5c5fc8d 100644
--- a/app/models/user.py
+++ b/app/models/user.py
@@ -25,12 +25,17 @@ class User(UserMixin):
         self.password_hash = password_hash
         self.role = role
         self.product_ids = product_ids or []
-        self.is_active = is_active
+        self._is_active = is_active
 
     def get_id(self):
         """Get user ID for Flask-Login"""
         return self.user_id
 
+    @property
+    def is_active(self):
+        """Check if user account is active (Flask-Login property)"""
+        return self._is_active
+
     @property
     def is_authenticated(self):
         """Check if user is authenticated"""
@@ -78,7 +83,7 @@ class User(UserMixin):
             'password_hash': self.password_hash,
             'role': self.role,
             'product_ids': self.product_ids,
-            'is_active': self.is_active
+            'is_active': self._is_active
         }
 
     @classmethod