diff --git a/app/core/config.py b/app/core/config.py
index f4efd8e..ebba67e 100644
--- a/app/core/config.py
+++ b/app/core/config.py
@@ -1,5 +1,5 @@
 from pathlib import Path
-from typing import List
+from typing import List, ClassVar
 
 from pydantic import BaseModel
 
@@ -11,7 +11,7 @@ class Settings(BaseModel):
     CORS_ORIGINS: List[str] = ["*"]
     
     # Database settings
-    DB_DIR = Path("/app") / "storage" / "db"
+    DB_DIR: ClassVar[Path] = Path("/app") / "storage" / "db"
     DB_DIR.mkdir(parents=True, exist_ok=True)
     DATABASE_URL: str = f"sqlite:///{DB_DIR}/db.sqlite"