diff --git a/.gitignore b/.gitignore
index 5a5d9ad..4d57da9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@
 /config.ini
 /public/robots.txt
 /lib/index-dev
+/vendor
diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..527358d
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,13 @@
+{
+    "minimum-stability": "dev",
+    "prefer-stable": true,
+    "require": {
+        "flashwave/index": "dev-master",
+        "flashwave/syokuhou": "dev-master"
+    },
+    "autoload": {
+        "psr-4": {
+            "Uiharu\\": "src"
+        }
+    }
+}
diff --git a/composer.lock b/composer.lock
new file mode 100644
index 0000000..7d04793
--- /dev/null
+++ b/composer.lock
@@ -0,0 +1,107 @@
+{
+    "_readme": [
+        "This file locks the dependencies of your project to a known state",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
+        "This file is @generated automatically"
+    ],
+    "content-hash": "d909826a501788db19148054e389ec5f",
+    "packages": [
+        {
+            "name": "flashwave/index",
+            "version": "dev-master",
+            "source": {
+                "type": "git",
+                "url": "https://git.flash.moe/flash/index.git",
+                "reference": "82a350a5c719cc83aa22382201683a68a2629f2a"
+            },
+            "require": {
+                "ext-mbstring": "*",
+                "php": ">=8.1"
+            },
+            "require-dev": {
+                "phpstan/phpstan": "^1.10",
+                "phpunit/phpunit": "^10.2"
+            },
+            "suggest": {
+                "ext-mysqli": "Support for the Index\\Data\\MariaDB namespace (both mysqlnd and libmysql are supported).",
+                "ext-sqlite3": "Support for the Index\\Data\\SQLite namespace."
+            },
+            "default-branch": true,
+            "type": "library",
+            "autoload": {
+                "files": [
+                    "index.php"
+                ],
+                "psr-4": {
+                    "Index\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "bsd-3-clause-clear"
+            ],
+            "authors": [
+                {
+                    "name": "flashwave",
+                    "email": "packagist@flash.moe",
+                    "homepage": "https://flash.moe",
+                    "role": "mom"
+                }
+            ],
+            "description": "Composer package for the common library for my projects.",
+            "homepage": "https://railgun.sh/index",
+            "time": "2023-09-15T22:44:36+00:00"
+        },
+        {
+            "name": "flashwave/syokuhou",
+            "version": "dev-master",
+            "source": {
+                "type": "git",
+                "url": "https://git.flash.moe/flash/syokuhou.git",
+                "reference": "b3470ad8605b0484294c73cd95be6e7ba4551e5a"
+            },
+            "require": {
+                "flashwave/index": "dev-master",
+                "php": ">=8.2"
+            },
+            "require-dev": {
+                "phpstan/phpstan": "^1.10",
+                "phpunit/phpunit": "^10.4"
+            },
+            "default-branch": true,
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Syokuhou\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "bsd-3-clause-clear"
+            ],
+            "authors": [
+                {
+                    "name": "flashwave",
+                    "email": "packagist@flash.moe",
+                    "homepage": "https://flash.moe",
+                    "role": "mom"
+                }
+            ],
+            "description": "Configuration library for PHP.",
+            "homepage": "https://railgun.sh/syokuhou",
+            "time": "2023-10-20T21:26:38+00:00"
+        }
+    ],
+    "packages-dev": [],
+    "aliases": [],
+    "minimum-stability": "dev",
+    "stability-flags": {
+        "flashwave/index": 20,
+        "flashwave/syokuhou": 20
+    },
+    "prefer-stable": true,
+    "prefer-lowest": false,
+    "platform": [],
+    "platform-dev": [],
+    "plugin-api-version": "2.3.0"
+}
diff --git a/public/index.html b/public/index.html
index 84a536d..8fbedce 100644
--- a/public/index.html
+++ b/public/index.html
@@ -18,7 +18,7 @@
                     </div>
                 </div>
                 <div class="uiharu-footer">
-                    <a href="https://flash.moe" target="_blank" rel="noopener">Flashwave</a> 2021-2023
+                    <a href="https://flash.moe" target="_blank" rel="noopener">flashwave</a> 2021-2023
                 </div>
             </div>
         </div>
diff --git a/uiharu.php b/uiharu.php
index cbff564..53c2acc 100644
--- a/uiharu.php
+++ b/uiharu.php
@@ -1,7 +1,6 @@
 <?php
 namespace Uiharu;
 
-use Index\Autoloader;
 use Index\Environment;
 use Index\Data\ConnectionFailedException;
 use Index\Data\DbTools;
@@ -12,15 +11,10 @@ define('UIH_DEBUG', is_file(UIH_ROOT . '/.debug'));
 define('UIH_PUBLIC', UIH_ROOT . '/public');
 define('UIH_SOURCE', UIH_ROOT . '/src');
 define('UIH_LIBRARY', UIH_ROOT . '/lib');
-define('UIH_VERSION', '20230609');
+define('UIH_VERSION', '20231021');
 
-define('UIH_NDX_PATH', UIH_LIBRARY . '/index');
-define('UIH_NDX_PATH_DEV', UIH_LIBRARY . '/index-dev');
+require_once UIH_ROOT . '/vendor/autoload.php';
 
-require_once (UIH_DEBUG && is_dir(UIH_NDX_PATH_DEV) ? UIH_NDX_PATH_DEV : UIH_NDX_PATH) . '/index.php';
-
-Autoloader::addNamespace('Masterminds', UIH_LIBRARY . '/html5-php/src');
-Autoloader::addNamespace(__NAMESPACE__, UIH_SOURCE);
 Environment::setDebug(UIH_DEBUG);
 
 mb_internal_encoding('utf-8');