diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9ec9999..f7b1a61 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # nystudio107/craft Change Log
 
+## 2.4.51 - 2021.12.22
+### Changed
+* Updated to use a unified `bootstrap.php`
+* Updated to use `vlucas/phpdotenv` `^5.4.0`
+* Updated to Tailwind CSS `^3.0.0`
+
 ## 2.4.50 - 2021.12.07
 ### Changed
 * Use Node 16 for the webpack buildchain container
diff --git a/buildchain/package.json b/buildchain/package.json
index 0af211d..8c1b698 100644
--- a/buildchain/package.json
+++ b/buildchain/package.json
@@ -38,7 +38,6 @@
     "core-js": "^3.0.0",
     "lazysizes": "^5.2.2",
     "regenerator-runtime": "^0.13.2",
-    "tailwindcss": "^2.1.0",
     "vue": "^3.0.0",
     "vue-confetti": "^2.0.8"
   },
@@ -102,6 +101,7 @@
     "stylelint": "^13.7.0",
     "stylelint-config-recommended": "^3.0.0",
     "symlink-webpack-plugin": "^0.0.4",
+    "tailwindcss": "^3.0.0",
     "terser-webpack-plugin": "^5.0.0",
     "ts-loader": "^8.0.0",
     "tsconfig-paths-webpack-plugin": "^3.3.0",
diff --git a/buildchain/tailwind.config.js b/buildchain/tailwind.config.js
index 219a3dc..0269fee 100644
--- a/buildchain/tailwind.config.js
+++ b/buildchain/tailwind.config.js
@@ -1,26 +1,11 @@
 // module exports
 module.exports = {
-  mode: 'jit',
-  purge: {
-    content: [
-      '../cms/templates/**/*.{twig,html}',
-      '../src/vue/**/*.{vue,html}',
-    ],
-    layers: [
-      'base',
-      'components',
-      'utilities',
-    ],
-    mode: 'layers',
-    options: {
-    }
-  },
+  content: [
+    '../cms/templates/**/*.{twig,html}',
+    '../src/vue/**/*.{vue,html}',
+    '../src/css/components/**/*.css',
+  ],
   theme: {
-    // Extend the default Tailwind config here
-    extend: {
-    },
-    // Replace the default Tailwind config here
   },
-  corePlugins: {},
   plugins: [],
 };
diff --git a/buildchain/webpack-configs/postcss-loader.config.js b/buildchain/webpack-configs/postcss-loader.config.js
index debf85f..3056865 100644
--- a/buildchain/webpack-configs/postcss-loader.config.js
+++ b/buildchain/webpack-configs/postcss-loader.config.js
@@ -37,11 +37,11 @@ module.exports = (type = 'modern', settings) => {
                                         ['postcss-import', {
                                             path: ['./node_modules'],
                                         }],
+                                        ['tailwindcss/nesting', {
+                                        }],
                                         TailwindCss('./tailwind.config.js'),
                                         ['postcss-mixins', {
                                         }],
-                                        ['postcss-nested', {
-                                        }],
                                         ['postcss-hexrgba', {
                                         }],
                                         ...postCssPlugins,
diff --git a/cms/bootstrap.php b/cms/bootstrap.php
new file mode 100644
index 0000000..2502887
--- /dev/null
+++ b/cms/bootstrap.php
@@ -0,0 +1,20 @@
+<?php
+/**
+ * Shared bootstrap file
+ */
+
+// Define path constants
+define('CRAFT_BASE_PATH', __DIR__);
+define('CRAFT_VENDOR_PATH', CRAFT_BASE_PATH . '/vendor');
+
+// Load Composer's autoloader
+require_once CRAFT_VENDOR_PATH . '/autoload.php';
+
+// Load dotenv?
+if (class_exists('Dotenv\Dotenv')) {
+    Dotenv\Dotenv::createUnsafeImmutable(CRAFT_BASE_PATH)->safeLoad();
+}
+
+// Define additional PHP constants
+// (see https://craftcms.com/docs/3.x/config/#php-constants)
+define('CRAFT_ENVIRONMENT', getenv('ENVIRONMENT') ?: 'production');
diff --git a/cms/composer.json b/cms/composer.json
index 118dfca..30b5c62 100644
--- a/cms/composer.json
+++ b/cms/composer.json
@@ -1,7 +1,7 @@
 {
   "require": {
     "craftcms/cms": "^3.6.9",
-    "vlucas/phpdotenv": "^3.4.0",
+    "vlucas/phpdotenv": "^5.4.0",
     "yiisoft/yii2-redis": "^2.0.6",
     "nystudio107/craft-imageoptimize": "^1.0.0",
     "nystudio107/craft-fastcgicachebust": "^1.0.0",
diff --git a/cms/craft b/cms/craft
index f7d775b..547e508 100755
--- a/cms/craft
+++ b/cms/craft
@@ -4,20 +4,11 @@
  * Craft console bootstrap file
  */
 
-// Set path constants
-define('CRAFT_BASE_PATH', __DIR__);
-define('CRAFT_VENDOR_PATH', CRAFT_BASE_PATH.'/vendor');
-
-// Load Composer's autoloader
-require_once CRAFT_VENDOR_PATH.'/autoload.php';
-
-// Load dotenv?
-if (class_exists('Dotenv\Dotenv') && file_exists(CRAFT_BASE_PATH.'/.env')) {
-    Dotenv\Dotenv::create(CRAFT_BASE_PATH)->load();
-}
+// Load shared bootstrap
+require __DIR__ . '/bootstrap.php';
 
 // Load and run Craft
-define('CRAFT_ENVIRONMENT', getenv('ENVIRONMENT') ?: 'production');
-$app = require CRAFT_VENDOR_PATH.'/craftcms/cms/bootstrap/console.php';
+/** @var craft\console\Application $app */
+$app = require CRAFT_VENDOR_PATH . '/craftcms/cms/bootstrap/console.php';
 $exitCode = $app->run();
 exit($exitCode);
diff --git a/cms/web/index.php b/cms/web/index.php
index b310965..774c24f 100644
--- a/cms/web/index.php
+++ b/cms/web/index.php
@@ -3,19 +3,10 @@
  * Craft web bootstrap file
  */
 
-// Set path constants
-define('CRAFT_BASE_PATH', dirname(__DIR__));
-define('CRAFT_VENDOR_PATH', CRAFT_BASE_PATH.'/vendor');
-
-// Load Composer's autoloader
-require_once CRAFT_VENDOR_PATH.'/autoload.php';
-
-// Load dotenv?
-if (class_exists('Dotenv\Dotenv') && file_exists(CRAFT_BASE_PATH.'/.env')) {
-    Dotenv\Dotenv::create(CRAFT_BASE_PATH)->load();
-}
+// Load shared bootstrap
+require dirname(__DIR__) . '/bootstrap.php';
 
 // Load and run Craft
-define('CRAFT_ENVIRONMENT', getenv('ENVIRONMENT') ?: 'production');
-$app = require CRAFT_VENDOR_PATH.'/craftcms/cms/bootstrap/web.php';
+/** @var craft\web\Application $app */
+$app = require CRAFT_VENDOR_PATH . '/craftcms/cms/bootstrap/web.php';
 $app->run();