diff --git a/app/Commands/SelfUpdateCommand.php b/app/Commands/SelfUpdateCommand.php
new file mode 100644
index 00000000..a642e3f0
--- /dev/null
+++ b/app/Commands/SelfUpdateCommand.php
@@ -0,0 +1,348 @@
+<?php
+
+/** @noinspection PhpComposerExtensionStubsInspection as we have our own extension check */
+
+declare(strict_types=1);
+
+namespace App\Commands;
+
+use Throwable;
+use App\Application;
+use RuntimeException;
+use Illuminate\Support\Str;
+use Illuminate\Console\Command;
+
+use function fopen;
+use function assert;
+use function fclose;
+use function rename;
+use function getenv;
+use function explode;
+use function ini_set;
+use function sprintf;
+use function implode;
+use function tempnam;
+use function passthru;
+use function array_map;
+use function curl_init;
+use function curl_exec;
+use function urlencode;
+use function base_path;
+use function curl_close;
+use function array_keys;
+use function json_decode;
+use function is_writable;
+use function curl_setopt;
+use function str_replace;
+use function array_combine;
+use function sys_get_temp_dir;
+use function extension_loaded;
+use function file_get_contents;
+use function get_included_files;
+
+/**
+ * @experimental This command is highly experimental and may contain bugs.
+ *
+ * @internal This command should not be accessed from the code as it may change significantly.
+ */
+class SelfUpdateCommand extends Command
+{
+    /** @var string */
+    protected $signature = 'self-update';
+
+    /** @var string */
+    protected $description = 'Update the standalone application to the latest version.';
+
+    protected const STATE_BEHIND = 1;
+    protected const STATE_UP_TO_DATE = 2;
+    protected const STATE_AHEAD = 3;
+
+    protected const STRATEGY_DIRECT = 'direct';
+    protected const STRATEGY_COMPOSER = 'composer';
+
+    /** @var array<string, string|array<string>> The latest release information from the GitHub API */
+    protected array $release;
+
+    public function handle(): int
+    {
+        try {
+            $this->output->title('Checking for a new version...');
+
+            $applicationPath = $this->findApplicationPath();
+            $this->debug("Application path: $applicationPath");
+
+            $strategy = $this->determineUpdateStrategy($applicationPath);
+            $this->debug('Update strategy: '.($strategy === self::STRATEGY_COMPOSER ? 'Composer' : 'Direct download'));
+
+            $currentVersion = $this->parseVersion(Application::APP_VERSION);
+            $this->debug('Current version: v'.implode('.', $currentVersion));
+
+            $latestVersion = $this->parseVersion($this->getLatestReleaseVersion());
+            $this->debug('Latest version: v'.implode('.', $latestVersion));
+
+            // Add a newline for better readability
+            $this->debug();
+
+            $state = $this->compareVersions($currentVersion, $latestVersion);
+            $this->printVersionStateInformation($state);
+
+            if ($state !== self::STATE_BEHIND) {
+                return Command::SUCCESS;
+            }
+
+            $this->output->title('Updating to the latest version...');
+
+            $this->updateApplication($strategy);
+
+            // Add a newline for better readability
+            $this->debug();
+
+            $this->info('The application has been updated successfully.');
+
+            return Command::SUCCESS;
+        } catch (Throwable $exception) {
+            $this->output->error('Something went wrong while updating the application!');
+
+            $this->line(" <error>{$exception->getMessage()}</error> on line <comment>{$exception->getLine()}</comment> in file <comment>{$exception->getFile()}</comment>");
+
+            if (! $this->output->isVerbose()) {
+                $this->line(' <fg=gray>For more information, run the command again with the `-v` option to throw the exception.</>');
+            }
+
+            $this->newLine();
+            $this->warn('As the self-update command is experimental, this may be a bug within the command itself.');
+
+            $this->line(sprintf('<info>%s</info> <href=%s>%s</>', 'Please report this issue on GitHub so we can fix it!',
+                $this->buildUrl('https://github.com/hydephp/cli/issues/new', [
+                    'title' => 'Error while self-updating the application',
+                    'body' => $this->stripPersonalInformation($this->getIssueMarkdown($exception))
+                ]), 'https://github.com/hydephp/cli/issues/new?title=Error+while+self-updating+the+application'
+            ));
+
+            if ($this->output->isVerbose()) {
+                throw $exception;
+            }
+
+            return Command::FAILURE;
+        }
+    }
+
+    protected function getLatestReleaseVersion(): string
+    {
+        $this->getLatestReleaseInformation();
+
+        return $this->release['tag_name'];
+    }
+
+    protected function getLatestReleaseInformation(): void
+    {
+        $data = json_decode($this->makeGitHubApiResponse(), true);
+
+        assert($data !== null);
+        assert(isset($data['tag_name']));
+        assert(isset($data['assets']));
+        assert(isset($data['assets'][0]));
+        assert(isset($data['assets'][0]['browser_download_url']));
+        assert(isset($data['assets'][0]['name']) && $data['assets'][0]['name'] === 'hyde');
+
+        $this->release = $data;
+    }
+
+    protected function makeGitHubApiResponse(): string
+    {
+        // Set the user agent as required by the GitHub API
+        ini_set('user_agent', $this->getUserAgent());
+
+        return file_get_contents('https://api.github.com/repos/hydephp/cli/releases/latest');
+    }
+
+    protected function getUserAgent(): string
+    {
+        return sprintf('HydePHP CLI updater v%s (github.com/hydephp/cli)', Application::APP_VERSION);
+    }
+
+    /** @return array{major: int, minor: int, patch: int} */
+    protected function parseVersion(string $semver): array
+    {
+        return array_combine(['major', 'minor', 'patch'],
+            array_map('intval', explode('.', $semver))
+        );
+    }
+
+    /** @return self::STATE_* */
+    protected function compareVersions(array $currentVersion, array $latestVersion): int
+    {
+        if ($currentVersion === $latestVersion) {
+            return self::STATE_UP_TO_DATE;
+        }
+
+        if ($currentVersion < $latestVersion) {
+            return self::STATE_BEHIND;
+        }
+
+        return self::STATE_AHEAD;
+    }
+
+    protected function findApplicationPath(): string
+    {
+        // Get the full path to the application executable
+        // Generally /user/bin/hyde, /usr/local/bin/hyde, or C:\Users\User\AppData\Roaming\Composer\vendor\bin\hyde
+
+        return get_included_files()[0];
+    }
+
+    /** @param self::STATE_* $state */
+    protected function printVersionStateInformation(int $state): void
+    {
+        match ($state) {
+            self::STATE_BEHIND => $this->info('A new version is available.'),
+            self::STATE_UP_TO_DATE => $this->info('You are already using the latest version.'),
+            self::STATE_AHEAD => $this->info('You are using a development version.'),
+        };
+    }
+
+    /** @param self::STRATEGY_* $strategy */
+    protected function updateApplication(string $strategy): void
+    {
+        $this->output->writeln('Updating the application...');
+
+        match ($strategy) {
+            self::STRATEGY_DIRECT => $this->updateDirectly(),
+            self::STRATEGY_COMPOSER => $this->updateViaComposer(),
+        };
+    }
+
+    /** @return self::STRATEGY_* */
+    protected function determineUpdateStrategy(string $applicationPath): string
+    {
+        // Check if the application is installed via Composer
+        if (Str::contains($applicationPath, 'composer', true)) {
+            return self::STRATEGY_COMPOSER;
+        }
+
+        // Check that the executable path is writable
+        if (! is_writable($applicationPath)) {
+            throw new RuntimeException('The application path is not writable. Please rerun the command with elevated privileges.');
+        }
+
+        // Check that the Curl extension is available
+        if (! extension_loaded('curl')) {
+            throw new RuntimeException('The Curl extension is required to use the self-update command.');
+        }
+
+        return self::STRATEGY_DIRECT;
+    }
+
+    protected function updateDirectly(): void
+    {
+        $this->output->writeln('Downloading the latest version...');
+
+        // Download the latest release from GitHub
+        $downloadUrl = $this->release['assets'][0]['browser_download_url'];
+        $downloadedFile = tempnam(sys_get_temp_dir(), 'hyde');
+        $this->downloadFile($downloadUrl, $downloadedFile);
+
+        // Replace the current application with the downloaded one
+        $this->replaceApplication($downloadedFile);
+    }
+
+    protected function downloadFile(string $url, string $destination): void
+    {
+        $this->debug("Downloading $url to $destination");
+
+        $file = fopen($destination, 'wb');
+        $ch = curl_init($url);
+
+        curl_setopt($ch, CURLOPT_FILE, $file);
+        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
+        curl_exec($ch);
+
+        curl_close($ch);
+        fclose($file);
+    }
+
+    protected function replaceApplication(string $downloadedFile): void
+    {
+        $applicationPath = $this->findApplicationPath();
+
+        $this->debug("Moving file $downloadedFile to $applicationPath");
+
+        // Replace the current application with the downloaded one
+        rename($downloadedFile, $applicationPath);
+    }
+
+    protected function updateViaComposer(): void
+    {
+        $this->output->writeln('Updating via Composer...');
+
+        // Invoke the Composer command to update the application
+        passthru('composer global update hyde/hyde');
+    }
+
+    protected function debug(string $message = ''): void
+    {
+        if ($this->output->isVerbose()) {
+            $this->output->writeln($message);
+        }
+    }
+
+    /** @param array<string, string> $params */
+    private function buildUrl(string $url, array $params): string
+    {
+        return sprintf("$url?%s", implode('&', array_map(function (string $key, string $value): string {
+            return sprintf('%s=%s', $key, urlencode($value));
+        }, array_keys($params), $params)));
+    }
+
+    private function getDebugEnvironment(): string
+    {
+        return implode("\n", [
+            'Application version: v'.Application::APP_VERSION,
+            'PHP version:         v'.PHP_VERSION,
+            'Operating system:    '.PHP_OS,
+        ]);
+    }
+
+    private function getIssueMarkdown(Throwable $exception): string
+    {
+        return <<<MARKDOWN
+        ### Description
+        
+        A fatal error occurred while trying to update the application using the self-update command.
+        
+        ### Error message
+        
+        ```
+        {$exception->getMessage()} on line {$exception->getLine()} in file {$exception->getFile()}
+        ```
+        
+        ### Stack trace
+        
+        ```
+        {$exception->getTraceAsString()}
+        ```
+        
+        ### Environment
+        
+        ```
+        {$this->getDebugEnvironment()}
+        ```
+        
+        ### Context
+        
+        - Add any additional context here that may be relevant to the issue.
+        
+        MARKDOWN;
+    }
+
+    private function stripPersonalInformation(string $markdown): string
+    {
+        // As the stacktrace may contain the user's name, we remove it to protect their privacy
+        $markdown = str_replace(getenv('USER') ?: getenv('USERNAME'), '<USERNAME>', $markdown);
+
+        // We also convert absolute paths to relative paths to avoid leaking the user's directory structure
+        $markdown = str_replace(base_path().DIRECTORY_SEPARATOR, '<project>'.DIRECTORY_SEPARATOR, $markdown);
+
+        return ($markdown);
+    }
+}
diff --git a/app/Providers/AppServiceProvider.php b/app/Providers/AppServiceProvider.php
index 35264a0c..c21870d1 100644
--- a/app/Providers/AppServiceProvider.php
+++ b/app/Providers/AppServiceProvider.php
@@ -4,6 +4,7 @@
 
 use App\Commands\Internal\Describer;
 use App\Commands\NewProjectCommand;
+use App\Commands\SelfUpdateCommand;
 use App\Commands\ServeCommand;
 use App\Commands\VendorPublishCommand;
 use Illuminate\Support\ServiceProvider;
@@ -18,6 +19,7 @@ public function register(): void
     {
         $this->commands([
             NewProjectCommand::class,
+            SelfUpdateCommand::class,
         ]);
     }
 
diff --git a/composer.json b/composer.json
index 910d6780..ff073a5c 100644
--- a/composer.json
+++ b/composer.json
@@ -62,5 +62,8 @@
         "laravel-zero/framework": "^10.0",
         "mockery/mockery": "^1.6",
         "pestphp/pest": "^2.26"
+    },
+    "suggest": {
+        "ext-curl": "Required for using the self-update feature when not installing through Composer."
     }
 }