diff --git a/backend/app/models/certificate.py b/backend/app/models/certificate.py
index b2e9774..d5be581 100644
--- a/backend/app/models/certificate.py
+++ b/backend/app/models/certificate.py
@@ -10,7 +10,7 @@ from typing import Optional
 from sqlalchemy import Column, Integer, String, Text, Boolean, DateTime, ForeignKey, Enum as SQLEnum, DECIMAL, JSON
 from sqlalchemy.orm import relationship
 
-from app.core.database import Base
+from app.models.base import Base
 
 
 class CertificateType(str, Enum):