diff --git a/Dockerfile b/Dockerfile
index 199458d..d0db361 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,43 +1,19 @@
-FROM php:7.4-cli
+FROM erikaheidi/minicli:php81
 
-ARG user=dynacover
-ARG uid=1000
-
-# Install system dependencies
-RUN apt-get update && apt-get install -y \
-    git \
-    curl \
-    libonig-dev \
-    libxml2-dev \
-    libfreetype6-dev \
-    libjpeg62-turbo-dev \
-    libpng-dev \
-    zip \
-    unzip
-
-# Clear cache
-RUN apt-get clean && rm -rf /var/lib/apt/lists/*
-
-# Install PHP extensions
-RUN docker-php-ext-configure gd --with-freetype --with-jpeg && \
-    docker-php-ext-install pdo_mysql mbstring exif pcntl bcmath gd
+ARG user=minicli
 
 # Get latest Composer
 COPY --from=composer:latest /usr/bin/composer /usr/bin/composer
 
-# Create system user to run commands
-RUN useradd -G sudo,root -u $uid -d /home/$user $user
 RUN mkdir -p /home/$user/.composer && \
     chown -R $user:$user /home/$user
 
 USER $user
 
-# Copy app files
-RUN mkdir -p /home/$user/dynacover
-COPY . /home/$user/dynacover/
+COPY . /home/$user
 
 # Set working directory
-WORKDIR /home/$user/dynacover
+WORKDIR /home/$user
 
 # Install dependencies
 RUN composer install
diff --git a/README.md b/README.md
index 5145fa0..07c1dcb 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ You can run Dynacover in three different ways:
 - as a **GitHub action**: the easiest way to run Dynacover is by setting it up in a public repository with [GitHub Actions](https://docs.github.com/en/actions), using repository secrets for credentials. [Follow this step-by-step guide](https://github.com/erikaheidi/dynacover/wiki/Setting-Up-Dynacover-with-GitHub-Actions) to set this up - no coding required.
 - with **Docker**: you can use the public [erikaheidi/dynacover](https://hub.docker.com/repository/docker/erikaheidi/dynacover) Docker image to run Dynacover with a single command, no PHP required. [Follow this guide](https://github.com/erikaheidi/dynacover/wiki/Running-Dynacover-with-Docker) to set this up.
   - to further customize your cover, you can clone the [dynacover repo](https://hub.docker.com/repository/docker/erikaheidi/dynacover) to customize banner resources (JSON template and header images, both located at `app/Resources`), then build a local copy of the Dynacover Docker image to use your custom changes.
-- with a **PHP CLI environment**: this will require `php-cli` 7.4+, Composer, and a few extensions: `php-gd`, `php-mbstring`, `php-curl`, and `php-json`. [Follow this guide](https://github.com/erikaheidi/dynacover/wiki/Running-Dynacover-on-a-PHP-CLI-environment) to set it up.
+- with a **PHP CLI environment**: this will require `php-cli` 8.1+, Composer, and a few extensions: `php-gd`, `php-mbstring`, `php-curl`, and `php-json`. [Follow this guide](https://github.com/erikaheidi/dynacover/wiki/Running-Dynacover-on-a-PHP-CLI-environment) to set it up.
 
 ### Obtaining Required Tokens
 
diff --git a/app/Command/Cover/GenerateController.php b/app/Command/Cover/GenerateController.php
index 6eaafc4..78058b2 100644
--- a/app/Command/Cover/GenerateController.php
+++ b/app/Command/Cover/GenerateController.php
@@ -10,7 +10,7 @@
 
 class GenerateController extends CommandController
 {
-    public function handle()
+    public function handle(): void
     {
         $template_file = $this->hasParam('template') ? $this->getParam('template') : $this->getApp()->config->default_template;
 
diff --git a/app/Command/Cover/UpdateController.php b/app/Command/Cover/UpdateController.php
index c878091..f8d71d6 100644
--- a/app/Command/Cover/UpdateController.php
+++ b/app/Command/Cover/UpdateController.php
@@ -7,7 +7,7 @@
 
 class UpdateController extends CommandController
 {
-    public function handle()
+    public function handle(): void
     {
         $template_file = $this->hasParam('template') ? $this->getParam('template') : $this->getApp()->config->default_template;
 
diff --git a/app/Command/Cover/UploadController.php b/app/Command/Cover/UploadController.php
index d052694..2ac3b81 100644
--- a/app/Command/Cover/UploadController.php
+++ b/app/Command/Cover/UploadController.php
@@ -5,18 +5,21 @@
 use App\Service\TwitterServiceProvider;
 use App\Storage;
 use Minicli\Command\CommandController;
+use MongoDB\Driver\Exception\CommandException;
 
 class UploadController extends CommandController
 {
-    public function handle()
+    /**
+     * @throws \Exception
+     */
+    public function handle(): void
     {
         /** @var TwitterServiceProvider $twitter */
         $twitter = $this->getApp()->twitter;
         $banner_path = Storage::root() . 'latest_header.png';
 
         if (!is_file($banner_path)) {
-            $this->getPrinter()->error("Header not found at default location.");
-            return 1;
+            throw new \Exception("Header not found at default location.");
         }
 
         $post = [
@@ -31,7 +34,6 @@ public function handle()
         $twitter->client->post('/account/update_profile_banner', $post);
 
         $this->getPrinter()->info("Finished uploading new banner.");
-        return 0;
     }
 
 }
\ No newline at end of file
diff --git a/app/Command/Fetch/FollowersController.php b/app/Command/Fetch/FollowersController.php
index a0b2bab..84b5a49 100644
--- a/app/Command/Fetch/FollowersController.php
+++ b/app/Command/Fetch/FollowersController.php
@@ -8,7 +8,7 @@
 
 class FollowersController extends CommandController
 {
-    public function handle()
+    public function handle(): void
     {
         /** @var TwitterServiceProvider $twitter */
         $twitter = $this->getApp()->twitter;
@@ -24,6 +24,5 @@ public function handle()
         }
 
         $this->getPrinter()->info("Finished.");
-        return 0;
     }
 }
\ No newline at end of file
diff --git a/app/Command/Generate/InteractionsController.php b/app/Command/Generate/InteractionsController.php
index 43ef05a..895cab7 100644
--- a/app/Command/Generate/InteractionsController.php
+++ b/app/Command/Generate/InteractionsController.php
@@ -12,7 +12,7 @@
 
 class InteractionsController extends CommandController
 {
-    public function handle(): int
+    public function handle(): void
     {
         //Start by building a dynamic template
         $template = new Template('twitter-interactions', [
@@ -104,7 +104,5 @@ public function handle(): int
         $save_path = Storage::root() . 'latest_header.png';
         $template->write($save_path);
         $this->getPrinter()->info("Finished generating cover at $save_path.");
-
-        return 0;
     }
 }
\ No newline at end of file
diff --git a/app/Command/Generate/TwitterController.php b/app/Command/Generate/TwitterController.php
index add8173..6091524 100644
--- a/app/Command/Generate/TwitterController.php
+++ b/app/Command/Generate/TwitterController.php
@@ -11,7 +11,10 @@
 
 class TwitterController extends CommandController
 {
-    public function handle(): int
+    /**
+     * @throws \Exception
+     */
+    public function handle(): void
     {
         $template_dir = $this->getApp()->config->templates_dir;
         $template_file = $this->getApp()->config->default_template;
@@ -25,8 +28,7 @@ public function handle(): int
         if (!is_file($template_file)) {
             $template_file = $template_dir . '/' . $template_file;
             if (!is_file($template_file)) {
-                $this->getPrinter()->error("Template $template_file not found.");
-                return 1;
+                throw new \Exception("Template $template_file not found.");
             }
         }
 
@@ -63,7 +65,5 @@ public function handle(): int
 
         $template->write($save_path);
         $this->getPrinter()->info("Finished generating cover at $save_path, using $template_file as template.");
-
-        return 0;
     }
 }
\ No newline at end of file
diff --git a/app/Command/Help/DefaultController.php b/app/Command/Help/DefaultController.php
index ba48d57..8836e87 100644
--- a/app/Command/Help/DefaultController.php
+++ b/app/Command/Help/DefaultController.php
@@ -10,13 +10,13 @@ class DefaultController extends CommandController
     /** @var  array */
     protected $command_map = [];
 
-    public function boot(App $app)
+    public function boot(App $app): void
     {
         parent::boot($app);
-        $this->command_map = $app->command_registry->getCommandMap();
+        $this->command_map = $app->commandRegistry->getCommandMap();
     }
     
-    public function handle()
+    public function handle(): void
     {
         $this->getPrinter()->info('Available Commands');
 
diff --git a/app/Command/Help/TableController.php b/app/Command/Help/TableController.php
deleted file mode 100644
index 6a49170..0000000
--- a/app/Command/Help/TableController.php
+++ /dev/null
@@ -1,26 +0,0 @@
-<?php
-
-namespace App\Command\Help;
-
-use Minicli\Command\CommandController;
-use Minicli\Output\Filter\ColorOutputFilter;
-use Minicli\Output\Helper\TableHelper;
-
-class TableController extends CommandController
-{
-    public function handle()
-    {
-        $this->getPrinter()->display('Testing Tables');
-
-        $table = new TableHelper();
-        $table->addHeader(['Header 1', 'Header 2', 'Header 3']);
-
-        for($i = 1; $i <= 10; $i++) {
-            $table->addRow([$i, rand(0, 10), "other string $i"]);
-        }
-
-        $this->getPrinter()->newline();
-        $this->getPrinter()->rawOutput($table->getFormattedTable(new ColorOutputFilter()));
-        $this->getPrinter()->newline();
-    }
-}
\ No newline at end of file
diff --git a/app/Command/Help/TestController.php b/app/Command/Help/TestController.php
deleted file mode 100644
index 321294c..0000000
--- a/app/Command/Help/TestController.php
+++ /dev/null
@@ -1,16 +0,0 @@
-<?php
-
-namespace App\Command\Help;
-
-use Minicli\Command\CommandController;
-
-class TestController extends CommandController
-{
-    public function handle()
-    {
-        $name = $this->hasParam('user') ? $this->getParam('user') : 'World';
-        $this->getPrinter()->display(sprintf("Hello, %s!", $name));
-
-        print_r($this->getParams());
-    }
-}
\ No newline at end of file
diff --git a/app/Service/GithubServiceProvider.php b/app/Service/GithubServiceProvider.php
index e42a766..ae2ebbb 100644
--- a/app/Service/GithubServiceProvider.php
+++ b/app/Service/GithubServiceProvider.php
@@ -20,7 +20,7 @@ class GithubServiceProvider implements ServiceInterface
 
     static string $API_ENDPOINT = "https://api.github.com/graphql";
 
-    public function load(App $app)
+    public function load(App $app): void
     {
         $this->agent = new Client();
         $this->token = $app->config->github_api_bearer;
diff --git a/app/Service/TwitterServiceProvider.php b/app/Service/TwitterServiceProvider.php
index 53cf9d1..8cbdfe1 100644
--- a/app/Service/TwitterServiceProvider.php
+++ b/app/Service/TwitterServiceProvider.php
@@ -12,7 +12,7 @@ class TwitterServiceProvider implements ServiceInterface
 {
     public TwitterOAuth $client;
 
-    public function load(App $app)
+    public function load(App $app): void
     {
         $api_token = $app->config->twitter_consumer_key;
         $api_secret = $app->config->twitter_consumer_secret;
diff --git a/composer.json b/composer.json
index f71911b..741e17d 100644
--- a/composer.json
+++ b/composer.json
@@ -10,12 +10,12 @@
     }
   },
   "require": {
-    "minicli/minicli": "^2.0",
+    "minicli/minicli": "^3.2.1",
     "abraham/twitteroauth": "^2.0",
     "ext-gd": "*",
     "ext-json": "*",
     "minicli/curly": "^0.1.2",
-    "erikaheidi/gdaisy": "^0.1.5"
+    "erikaheidi/gdaisy": "^0.3.0"
   },
   "scripts": {
     "post-install-cmd": [
diff --git a/composer.lock b/composer.lock
index 30eb046..9eb5980 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "ff2d15be925595100cccb7157e46e9c4",
+    "content-hash": "a5bc7912e73ac3b7c52cd20567b14fa1",
     "packages": [
         {
             "name": "abraham/twitteroauth",
@@ -69,16 +69,16 @@
         },
         {
             "name": "composer/ca-bundle",
-            "version": "1.2.10",
+            "version": "1.3.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/composer/ca-bundle.git",
-                "reference": "9fdb22c2e97a614657716178093cd1da90a64aa8"
+                "reference": "30897edbfb15e784fe55587b4f73ceefd3c4d98c"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/composer/ca-bundle/zipball/9fdb22c2e97a614657716178093cd1da90a64aa8",
-                "reference": "9fdb22c2e97a614657716178093cd1da90a64aa8",
+                "url": "https://api.github.com/repos/composer/ca-bundle/zipball/30897edbfb15e784fe55587b4f73ceefd3c4d98c",
+                "reference": "30897edbfb15e784fe55587b4f73ceefd3c4d98c",
                 "shasum": ""
             },
             "require": {
@@ -90,7 +90,7 @@
                 "phpstan/phpstan": "^0.12.55",
                 "psr/log": "^1.0",
                 "symfony/phpunit-bridge": "^4.2 || ^5",
-                "symfony/process": "^2.5 || ^3.0 || ^4.0 || ^5.0"
+                "symfony/process": "^2.5 || ^3.0 || ^4.0 || ^5.0 || ^6.0"
             },
             "type": "library",
             "extra": {
@@ -125,7 +125,7 @@
             "support": {
                 "irc": "irc://irc.freenode.org/composer",
                 "issues": "https://github.com/composer/ca-bundle/issues",
-                "source": "https://github.com/composer/ca-bundle/tree/1.2.10"
+                "source": "https://github.com/composer/ca-bundle/tree/1.3.3"
             },
             "funding": [
                 {
@@ -141,27 +141,27 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2021-06-07T13:58:28+00:00"
+            "time": "2022-07-20T07:14:26+00:00"
         },
         {
             "name": "erikaheidi/gdaisy",
-            "version": "0.1.6",
+            "version": "0.3.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/erikaheidi/gdaisy.git",
-                "reference": "2c9bdcb602b4118e6e17b588b2497c81a052dfc0"
+                "reference": "eaf23e5d047d0077457c5215329f00e3417e80d2"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/erikaheidi/gdaisy/zipball/2c9bdcb602b4118e6e17b588b2497c81a052dfc0",
-                "reference": "2c9bdcb602b4118e6e17b588b2497c81a052dfc0",
+                "url": "https://api.github.com/repos/erikaheidi/gdaisy/zipball/eaf23e5d047d0077457c5215329f00e3417e80d2",
+                "reference": "eaf23e5d047d0077457c5215329f00e3417e80d2",
                 "shasum": ""
             },
             "require": {
                 "ext-gd": "*",
                 "ext-json": "*",
-                "minicli/minicli": "^2.2",
-                "php": "^7.4|^8.0"
+                "minicli/minicli": "^3.2",
+                "php": "^8.1"
             },
             "require-dev": {
                 "pestphp/pest": "^1.0"
@@ -183,9 +183,9 @@
             "description": "php-gd templating system",
             "support": {
                 "issues": "https://github.com/erikaheidi/gdaisy/issues",
-                "source": "https://github.com/erikaheidi/gdaisy/tree/0.1.6"
+                "source": "https://github.com/erikaheidi/gdaisy/tree/0.3.1"
             },
-            "time": "2021-06-30T16:55:26+00:00"
+            "time": "2022-09-28T16:07:04+00:00"
         },
         {
             "name": "minicli/curly",
@@ -229,32 +229,31 @@
         },
         {
             "name": "minicli/minicli",
-            "version": "2.2.1",
+            "version": "3.2.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/minicli/minicli.git",
-                "reference": "b359a740b7dc258acaf52d4373cac5f545705b33"
+                "reference": "2d31b303461d0ec1f8c6d0be00f8b26be8766fbe"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/minicli/minicli/zipball/b359a740b7dc258acaf52d4373cac5f545705b33",
-                "reference": "b359a740b7dc258acaf52d4373cac5f545705b33",
+                "url": "https://api.github.com/repos/minicli/minicli/zipball/2d31b303461d0ec1f8c6d0be00f8b26be8766fbe",
+                "reference": "2d31b303461d0ec1f8c6d0be00f8b26be8766fbe",
                 "shasum": ""
             },
             "require": {
                 "ext-readline": "*",
-                "php": ">=7.3"
+                "php": ">=8"
             },
             "require-dev": {
-                "friendsofphp/php-cs-fixer": "^2.16",
+                "friendsofphp/php-cs-fixer": "^3.5",
                 "pestphp/pest": "^1.0",
                 "phpunit/phpunit": "^9.0"
             },
             "type": "library",
             "autoload": {
                 "psr-4": {
-                    "Minicli\\": "src/",
-                    "Assets\\": "tests/Assets"
+                    "Minicli\\": "src/"
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -269,7 +268,7 @@
             ],
             "support": {
                 "issues": "https://github.com/minicli/minicli/issues",
-                "source": "https://github.com/minicli/minicli/tree/2.2.1"
+                "source": "https://github.com/minicli/minicli/tree/3.2.1"
             },
             "funding": [
                 {
@@ -277,7 +276,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2021-05-08T15:36:01+00:00"
+            "time": "2022-09-23T09:04:22+00:00"
         }
     ],
     "packages-dev": [],
@@ -291,5 +290,5 @@
         "ext-json": "*"
     },
     "platform-dev": [],
-    "plugin-api-version": "2.0.0"
+    "plugin-api-version": "2.3.0"
 }