diff --git a/apps/api/app/dependencies.py b/apps/api/app/dependencies.py
index e0c0d57ac..a1d45a039 100644
--- a/apps/api/app/dependencies.py
+++ b/apps/api/app/dependencies.py
@@ -1,3 +1,5 @@
+from typing import Generator
+
 import redis
 from app.config import settings
 from fastapi import Depends
@@ -40,7 +42,8 @@ from packages.ports.workspace_repository import WorkspaceRepository
 _engine, _SessionLocal = build_session_factory(settings.DATABASE_URL)
 
 
-def get_db_session():
+def get_db_session() -> Generator[Session, None, None]:
+    """获取数据库会话"""
     session: Session = _SessionLocal()
     try:
         yield session
@@ -120,13 +123,13 @@ def get_workspace_invitation_repository(
     return SQLAlchemyWorkspaceInvitationRepository(session)
 
 
-def get_auth_session_store():
-    if not settings.ENABLE_REDIS_SESSIONS:
+def get_auth_session_store() -> NoopSessionStore | SessionStore:
+    if not settings.ENABLE_REDIS_SESSION:
         return NoopSessionStore()
     return SessionStore(redis_client=redis.from_url(settings.REDIS_URL, decode_responses=True))
 
 
-def get_auth_email_service():
+def get_auth_email_service() -> NoopEmailService:
     if not settings.ENABLE_EMAIL_DELIVERY:
         return NoopEmailService()
     return get_email_service(