diff --git a/composer.json b/composer.json
index bba24c9..42c9ec3 100644
--- a/composer.json
+++ b/composer.json
@@ -1,9 +1,7 @@
 {
-    "minimum-stability": "dev",
-    "prefer-stable": true,
     "require": {
-        "flashwave/index": "dev-master",
-        "flashwave/syokuhou": "dev-master",
+        "flashwave/index": "^0.2408.40014",
+        "flashwave/syokuhou": "^1.2",
         "sentry/sdk": "^4.0"
     },
     "autoload": {
diff --git a/uiharu.php b/uiharu.php
index e9c1721..12655e9 100644
--- a/uiharu.php
+++ b/uiharu.php
@@ -1,7 +1,6 @@
 <?php
 namespace Uiharu;
 
-use Index\Environment;
 use Index\Data\DbTools;
 use Syokuhou\SharpConfig;
 
@@ -15,10 +14,9 @@ define('UIH_VERSION', '20240330');
 
 require_once UIH_ROOT . '/vendor/autoload.php';
 
-Environment::setDebug(UIH_DEBUG);
-
-mb_internal_encoding('utf-8');
-date_default_timezone_set('utc');
+error_reporting(UIH_DEBUG ? -1 : 0);
+mb_internal_encoding('UTF-8');
+date_default_timezone_set('GMT');
 
 $cfg = SharpConfig::fromFile(UIH_ROOT . '/uiharu.cfg');