diff --git a/app/main.py b/app/main.py
index fd93df9..577c491 100644
--- a/app/main.py
+++ b/app/main.py
@@ -41,7 +41,7 @@ app.add_middleware(
     session_cookie=os.getenv("SESSION_COOKIE_NAME", "session"),
     same_site=os.getenv("SESSION_SAME_SITE", "lax"),
     https_only=os.getenv("SESSION_HTTPS_ONLY", "0") == "1",
-    max_age=int(os.getenv("SESSION_MAX_AGE", str(60 * 60 * 24 * 14))),  # 14d
+    max_age=int(os.getenv("SESSION_MAX_AGE", "28800")),  # 8h — dbx-main 과 통일
 )
 
 # Include routers