diff --git a/app/controllers/oauth/callbacks_controller.rb b/app/controllers/oauth/callbacks_controller.rb
index ccfd35418..b97fdc023 100644
--- a/app/controllers/oauth/callbacks_controller.rb
+++ b/app/controllers/oauth/callbacks_controller.rb
@@ -39,7 +39,9 @@ class Oauth::CallbacksController < Oauth::BaseController
           new_user = true
           login = build_login_name(platform, auth_hash.info.nickname)
           mail = "#{login}@example.org" if mail.blank?
-          reg_result = autologin_register(login, mail, "Ec#{login}2022#", platform, nil, nickname)
+          code = %W(0 1 2 3 4 5 6 7 8 9)
+          rand_password = code.sample(10).join
+          reg_result = autologin_register(login, mail, rand_password, platform, nil, nickname)
           Rails.logger.info("[OAuth2] omniauth.auth [reg_result] #{reg_result} ")
           if reg_result[:message].blank?
             open_user = "OpenUsers::#{platform.to_s.capitalize}".constantize.create!(user_id: reg_result[:user][:id], uid: uid, extra: auth_hash.extra)