diff --git a/backend/app/auth/signup_routes.py b/backend/app/auth/signup_routes.py
index 592d24b..fb8ef30 100644
--- a/backend/app/auth/signup_routes.py
+++ b/backend/app/auth/signup_routes.py
@@ -66,7 +66,7 @@ async def signup_request(
                 )
         
         # 비밀번호 해싱
-        auth_service = AuthService()
+        auth_service = AuthService(db)
         hashed_password = auth_service.hash_password(signup_data.password)
         
         # 승인 대기 상태로 사용자 생성