diff --git a/.env.example b/.env.example
index 09a4d577..d058c34e 100644
--- a/.env.example
+++ b/.env.example
@@ -32,6 +32,8 @@ MAIL_ENCRYPTION=null
 
 AWS_ACCESS_KEY_ID=
 AWS_SECRET_ACCESS_KEY=
+AWS_DEFAULT_REGION=us-east-1
+AWS_BUCKET=
 
 PUSHER_APP_ID=
 PUSHER_APP_KEY=
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 58c52246..aa0c0ce7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,24 @@
 # Release Notes
 
+## [Unreleased](https://github.com/laravel/laravel/compare/v5.8.3...master)
+
+### Changed
+- Upgrade the collision dependency from v2 to v3 ([#4963](https://github.com/laravel/laravel/pull/4963))
+
+
+## [v5.8.3 (2019-03-05)](https://github.com/laravel/laravel/compare/v5.8.0...v5.8.3)
+
+### Added
+- Add AWS S3 Bucket to `.env.example` ([f84a69e](https://github.com/laravel/laravel/commit/f84a69ee852bd44363042a61995d330574b6b8c3))
+
+### Changed
+- Set default AWS region ([ff4f40f](https://github.com/laravel/laravel/commit/ff4f40fbabcefcb87facb1346fcfe5b8266eb40d), [#4956](https://github.com/laravel/laravel/pull/4956))
+
+### Fixed
+- Comment out non-existing model class and policy example ([f4ff4f4](https://github.com/laravel/laravel/commit/f4ff4f4176f7d931e301f36b95a46285ac61b8b8))
+- Only apply MySQL PDO options when extension exists ([3001f3c](https://github.com/laravel/laravel/commit/3001f3c6e232ba7ce2ecdbdfe6e43b4c64ee05ad))
+
+
 ## [v5.8.0 (2019-02-26)](https://github.com/laravel/laravel/compare/v5.7.28...v5.8.0)
 
 ### Added
diff --git a/app/Providers/AuthServiceProvider.php b/app/Providers/AuthServiceProvider.php
index 9784b1a3..0acc984b 100644
--- a/app/Providers/AuthServiceProvider.php
+++ b/app/Providers/AuthServiceProvider.php
@@ -13,7 +13,7 @@ class AuthServiceProvider extends ServiceProvider
      * @var array
      */
     protected $policies = [
-        'App\Model' => 'App\Policies\ModelPolicy',
+        // 'App\Model' => 'App\Policies\ModelPolicy',
     ];
 
     /**
diff --git a/composer.json b/composer.json
index a6fbbfbd..b4e434dd 100644
--- a/composer.json
+++ b/composer.json
@@ -18,7 +18,7 @@
         "filp/whoops": "^2.0",
         "fzaninotto/faker": "^1.4",
         "mockery/mockery": "^1.0",
-        "nunomaduro/collision": "^2.0",
+        "nunomaduro/collision": "^3.0",
         "phpunit/phpunit": "^8.0"
     },
     "config": {
diff --git a/config/cache.php b/config/cache.php
index 49767228..30f0cae2 100644
--- a/config/cache.php
+++ b/config/cache.php
@@ -80,7 +80,7 @@
             'driver' => 'dynamodb',
             'key' => env('AWS_ACCESS_KEY_ID'),
             'secret' => env('AWS_SECRET_ACCESS_KEY'),
-            'region' => env('AWS_REGION', 'us-east-1'),
+            'region' => env('AWS_DEFAULT_REGION', 'us-east-1'),
             'table' => env('DYNAMODB_CACHE_TABLE', 'cache'),
         ],
 
diff --git a/config/database.php b/config/database.php
index 77c31843..49ec59af 100644
--- a/config/database.php
+++ b/config/database.php
@@ -54,9 +54,9 @@
             'prefix_indexes' => true,
             'strict' => true,
             'engine' => null,
-            'options' => array_filter([
+            'options' => extension_loaded('pdo_mysql') ? array_filter([
                 PDO::MYSQL_ATTR_SSL_CA => env('MYSQL_ATTR_SSL_CA'),
-            ]),
+            ]) : [],
         ],
 
         'pgsql' => [
diff --git a/config/mail.php b/config/mail.php
index f4006459..6f8469f8 100644
--- a/config/mail.php
+++ b/config/mail.php
@@ -12,7 +12,7 @@
     | your application here. By default, Laravel is setup for SMTP mail.
     |
     | Supported: "smtp", "sendmail", "mailgun", "mandrill", "ses",
-    |            "sparkpost", "log", "array"
+    |            "sparkpost", "postmark", "log", "array"
     |
     */
 
diff --git a/config/queue.php b/config/queue.php
index ec520ec6..07c7d2a9 100644
--- a/config/queue.php
+++ b/config/queue.php
@@ -55,7 +55,7 @@
             'secret' => env('AWS_SECRET_ACCESS_KEY'),
             'prefix' => env('SQS_PREFIX', 'https://sqs.us-east-1.amazonaws.com/your-account-id'),
             'queue' => env('SQS_QUEUE', 'your-queue-name'),
-            'region' => env('AWS_REGION', 'us-east-1'),
+            'region' => env('AWS_DEFAULT_REGION', 'us-east-1'),
         ],
 
         'redis' => [
diff --git a/config/services.php b/config/services.php
index e546cbf9..f026b2c7 100644
--- a/config/services.php
+++ b/config/services.php
@@ -27,7 +27,7 @@
     'ses' => [
         'key' => env('AWS_ACCESS_KEY_ID'),
         'secret' => env('AWS_SECRET_ACCESS_KEY'),
-        'region' => env('AWS_REGION', 'us-east-1'),
+        'region' => env('AWS_DEFAULT_REGION', 'us-east-1'),
     ],
 
     'sparkpost' => [