public function getConfig() {
        $key = abs($this->version()) == 5 ? 'croppa' : 'croppa::config';

        $config = $this->app->make('config')->get($key);

        // Use Laravel's encryption key if instructed to
        if (isset($config['signing_key']) && $config['signing_key'] == 'app.key') {
            $config['signing_key'] = $this->app->make('config')->get('app.key');
        }

        return $config;
    }