diff --git a/ecs/jskult-webapp/src/model/internal/session.py b/ecs/jskult-webapp/src/model/internal/session.py
index 2fce4869..f2495c2a 100644
--- a/ecs/jskult-webapp/src/model/internal/session.py
+++ b/ecs/jskult-webapp/src/model/internal/session.py
@@ -29,10 +29,10 @@ class UserSession(DynamoDBTableModel):
         return datetime.datetime.now().timestamp()
 
     @classmethod
-    # FIXME: 20分にしない方がいい。12時間とかでいい
-    def new_record_expiration_time(cls, expire=environment.SESSION_EXPIRE_MINUTE):
+    def new_record_expiration_time(cls):
         last_access_time = datetime.datetime.fromtimestamp(cls.new_last_access_time())
-        return (last_access_time + datetime.timedelta(minutes=expire)).timestamp()
+        # 1時間後に有効期限切れにする
+        return (last_access_time + datetime.timedelta(hours=1)).timestamp().timestamp()
 
     @classmethod
     def new(