diff --git a/app/controllers/account_controller.rb b/app/controllers/account_controller.rb
index 1ae326c26..7976e1aa4 100644
--- a/app/controllers/account_controller.rb
+++ b/app/controllers/account_controller.rb
@@ -333,7 +333,7 @@ class AccountController < ApplicationController
     token = Token.get_or_create_permanent_login_token(user)
     cookie_options = {
       :value => token.value,
-      :expires => 7.days.from_now,
+      :expires => 1.month.from_now,
       :path => (Redmine::Configuration['autologin_cookie_path'] || '/'),
       :secure => (Redmine::Configuration['autologin_cookie_secure'] ? true : false),
       :httponly => true