diff --git a/webapp/controller/SignController.class.php b/webapp/controller/SignController.class.php
index 9164889..fb3ceb5 100644
--- a/webapp/controller/SignController.class.php
+++ b/webapp/controller/SignController.class.php
@@ -124,12 +124,13 @@ class SignController{
             if ($nowTime - phpcommon\getdayseconds($row['sign_time']) > 0) {
                 $sign_days = $row['sign_days'] + 1;
                 $signable = 0;
-                $ret = $conn->execScript('UPDATE sign SET sign_days=:sign_days, signable=:signable ' .
+                $ret = $conn->execScript('UPDATE sign SET sign_days=:sign_days, sign_time=:sign_time, signable=:signable ' .
                                          ' WHERE accountid=:accountid;',
                                          array(
                                              ':accountid' => $account_id,
                                              ':sign_days' => $sign_days,
-                                             ':signable' => $signable
+                                             ':signable' => $signable,
+                                             ':sign_time' => time()
                                          ));
                 if (!$ret) {
                     die();