diff --git a/app/core/config.py b/app/core/config.py
index cc7da1e..70d5321 100644
--- a/app/core/config.py
+++ b/app/core/config.py
@@ -1,4 +1,5 @@
 from pathlib import Path
+from typing import ClassVar
 from pydantic_settings import BaseSettings
 
 
@@ -9,13 +10,14 @@ class Settings(BaseSettings):
     PROJECT_VERSION: str = "0.1.0"
 
     # Database settings
-    DB_DIR = Path("/app") / "storage" / "db"
+    DB_DIR: ClassVar[Path] = Path("/app") / "storage" / "db"
     DB_DIR.mkdir(parents=True, exist_ok=True)
     SQLALCHEMY_DATABASE_URL: str = f"sqlite:///{DB_DIR}/db.sqlite"
 
-    class Config:
-        case_sensitive = True
-        env_file = ".env"
+    model_config = {
+        "case_sensitive": True,
+        "env_file": ".env",
+    }
 
 
 settings = Settings()
diff --git a/app/schemas/todo.py b/app/schemas/todo.py
index 23c46fa..27ec18e 100644
--- a/app/schemas/todo.py
+++ b/app/schemas/todo.py
@@ -25,5 +25,4 @@ class Todo(TodoBase):
     created_at: datetime
     updated_at: datetime
 
-    class Config:
-        orm_mode = True
+    model_config = {"from_attributes": True}