diff --git a/back/db.py b/back/db.py
index 6c1b951..cab4b6f 100644
--- a/back/db.py
+++ b/back/db.py
@@ -11,7 +11,11 @@ from fastapi import Depends
 
 SQLALCHEMY_DATABASE_URL = "sqlite:///./sql_app.db"
 
-SessionLocal = sessionmaker(class_='Session', bind=Engine(sqlite:///./sql_app.db), autoflush=True, autocommit=False, expire_on_commit=False)
+engine = create_engine(
+    SQLALCHEMY_DATABASE_URL, connect_args={"check_same_thread": False}
+)
+
+SessionLocal = sessionmaker(bind=engine, autoflush=True, autocommit=False, expire_on_commit=False)
 
 database = SessionLocal()
 Base = declarative_base()
\ No newline at end of file