diff --git a/kona3engine/action/login.inc.php b/kona3engine/action/login.inc.php
index ce7bdc0..33ee0e2 100644
--- a/kona3engine/action/login.inc.php
+++ b/kona3engine/action/login.inc.php
@@ -101,13 +101,13 @@ function kona3_action_login() {
   }
   // login form
   $kona3conf["robots"] = "noindex";
-  kona3template('login.html', array(
+  kona3template('login.html', [
     "page_title" => $page,
     "msg" => $msg,
     "action" => $action,
     "signup_link" => kona3getPageURL($page, 'signup'),
     "edit_token" => kona3_getEditToken($editTokenKey, TRUE),
-  ));
+  ]);
 }
 
 
diff --git a/kona3engine/index.inc.php b/kona3engine/index.inc.php
index 0b059c1..c776105 100644
--- a/kona3engine/index.inc.php
+++ b/kona3engine/index.inc.php
@@ -31,8 +31,9 @@
     }
 }
 // session
-$wiki_title = isset($kona3conf['wiki_title']) ? $kona3conf['wiki_title'] : '_def';
-session_start(['name' => urlencode("kona3{$wiki_title}")]);
+$wiki_title = isset($kona3conf['wiki_title']) ? $kona3conf['wiki_title'] : 'KonaWiki3';
+$session_name = isset($kona3conf['session_name']) ? $kona3conf['session_name'] : 'kona3session';
+session_start(['name' => $session_name]);
 
 // --------------------
 // include library
diff --git a/kona3engine/kona3conf.inc.php b/kona3engine/kona3conf.inc.php
index 87d895e..5d55ce8 100644
--- a/kona3engine/kona3conf.inc.php
+++ b/kona3engine/kona3conf.inc.php
@@ -18,6 +18,7 @@
 // --------------------
 function kona3conf_init(&$conf) {
   check_conf($conf, 'wiki_title', 'KonaWiki3');
+  check_conf($conf, 'session_name', 'kona3session');
   check_conf($conf, 'admin_email', 'admin@example.com');
   check_conf($conf, 'wiki_private', TRUE);
   check_conf($conf, 'lang', 'ja');
diff --git a/kona3engine/kona3lib.inc.php b/kona3engine/kona3lib.inc.php
index 9abf070..e682966 100644
--- a/kona3engine/kona3lib.inc.php
+++ b/kona3engine/kona3lib.inc.php
@@ -695,13 +695,13 @@ function kona3_getEditTokenForceUpdate($key = 'default') {
     $sname = kona3_getEditTokenKeyName($key);
     $sname_time = "{$sname}.time";
     // update token
-    if (empty($kona3conf["{$sname}_token"])) {
+    if (empty($kona3conf[$sname])) {
         $token = bin2hex(random_bytes(32));
         $_SESSION[$sname] = $token;
         $_SESSION[$sname_time] = time();
-        $kona3conf["{$sname}_token"] = $token;
+        $kona3conf[$sname] = $token;
     }
-    return $kona3conf["{$sname}_token"];
+    return $kona3conf[$sname];
 }
 
 function kona3_getEditToken($key = 'default', $update = TRUE) {
@@ -716,7 +716,7 @@ function kona3_getEditToken($key = 'default', $update = TRUE) {
         return kona3_getEditTokenForceUpdate($key);
     }
     // check time
-    $ONE_DAY = 60 * 60 * 24; // 1day
+    $ONE_DAY = 3;// 60 * 60 * 24; // 1day
     $time = isset($_SESSION[$sname_time]) ? $_SESSION[$sname_time] : time();
     $expire_time = $time + $ONE_DAY;
     if (time() > $expire_time) {