<?php

namespace Illuminate\Encryption;

use Illuminate\Support\ServiceProvider;

class EncryptionServiceProvider extends ServiceProvider
{
    /**
     * Register the service provider.
     *
     * @return void
     */
    public function register()
    {
        $this->app->singleton('encrypter', function ($app) {
            return new Encrypter($app['config']['app.key'], $app['config']['app.cipher']);
        });
    }
}

<?php

namespace Illuminate\Encryption;

use Illuminate\Support\ServiceProvider;

class EncryptionServiceProvider extends ServiceProvider
{
    /**
     * Register the service provider.
     *
     * @return void
     */
    public function register()
    {
        $this->app->singleton('encrypter', function ($app) {
            return new Encrypter($app['config']['app.key']);
        });
    }
}

--- 
+++ 
@@ -14,7 +14,7 @@
     public function register()
     {
         $this->app->singleton('encrypter', function ($app) {
-            return new Encrypter($app['config']['app.key']);
+            return new Encrypter($app['config']['app.key'], $app['config']['app.cipher']);
         });
     }
 }
Configure the cipher in the SP
