diff --git a/.gitignore b/.gitignore
index 63cfbc8..bad7e9a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,5 @@ vendor
 lumen.log
 .php_cs.cache
 tmp[a-zA-Z0-9]{6,99}
+Vagrantfile
+.vagrant/
diff --git a/.travis.yml b/.travis.yml
index de010e8..38e2f09 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,14 +1,14 @@
 language: php
 
 php:
-  - 5.5
   - 5.6
   - 7.0
+  - 7.1
   - hhvm
 
 before_script:
   - travis_retry composer self-update
-  - travis_retry composer install --prefer-source --no-interaction --dev
+  - travis_retry composer install --prefer-source --no-interaction
 
 script:
   - "phpunit --process-isolation"
diff --git a/bootstrap.php b/bootstrap.php
index 95f7709..3853139 100644
--- a/bootstrap.php
+++ b/bootstrap.php
@@ -1,6 +1,6 @@
 <?php
 
-require_once 'vendor/autoload.php';
+require_once __DIR__ . '/vendor/autoload.php';
 
 $path = __DIR__.'/fixture';
 
@@ -34,9 +34,15 @@
 |
 */
 
-$app->singleton('Illuminate\Contracts\Console\Kernel', 'App\Console\Kernel');
+$app->singleton(
+    Illuminate\Contracts\Console\Kernel::class,
+    App\Console\Kernel::class
+);
 
-$app->get('awesome/action', 'AwesomeController@action');
+$app->singleton(
+    Illuminate\Contracts\Debug\ExceptionHandler::class,
+    Laravel\Lumen\Exceptions\Handler::class
+);
 
 /*
 |--------------------------------------------------------------------------
@@ -50,11 +56,8 @@
 */
 
 $app->middleware([
-    Illuminate\Cookie\Middleware\EncryptCookies::class,
-    Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse::class,
     Illuminate\Session\Middleware\StartSession::class,
-    Illuminate\View\Middleware\ShareErrorsFromSession::class,
-    Laravel\Lumen\Http\Middleware\VerifyCsrfToken::class,
+    Illuminate\View\Middleware\ShareErrorsFromSession::class
 ]);
 
 $app->routeMiddleware([]);
diff --git a/composer.json b/composer.json
index e7ba3a2..7ce5593 100644
--- a/composer.json
+++ b/composer.json
@@ -5,19 +5,23 @@
     "license": "MIT",
     "type": "package",
     "authors":[
-      {
-        "name": "Vagner do Carmo",
-        "email": "vluzrmos@gmail.com"
-      }
+        {
+            "name": "Vagner do Carmo",
+            "email": "vluzrmos@gmail.com"
+        },
+        {
+            "name": "Szabolcs (Szasza) Palmer",
+            "email": "szasza@szasza.info"
+        }
     ],
     "require":{
-      "laravel/lumen-framework": "~5.1",
-      "psy/psysh":"~0.5.1|~0.6.1"
+        "laravel/lumen-framework": "~5.3",
+        "psy/psysh":"~0.7.0|~0.8.0"
     },
     "require-dev":{
-      "phpunit/phpunit": "~4.0",
-      "fzaninotto/faker": "~1.4",
-      "fabpot/php-cs-fixer": "~2.0"
+        "phpunit/phpunit": "~5.0",
+        "fzaninotto/faker": "~1.4",
+        "friendsofphp/php-cs-fixer": "^2.0"
     },
     "autoload": {
         "psr-4": {
@@ -25,12 +29,12 @@
         }
     },
     "autoload-dev": {
-      "psr-4": {
-        "App\\": "fixture/app/"
-      }
+        "psr-4": {
+            "App\\": "fixture/app/"
+        }
     },
     "config":{
-      "preferred-install":"dist"
+        "preferred-install":"dist"
     },
     "minimum-stability":"dev"
 }
diff --git a/readme.md b/readme.md
index bedad23..21c7174 100644
--- a/readme.md
+++ b/readme.md
@@ -21,6 +21,7 @@ Package Versions:
 |-------|--------|
 | 5.0   | 1.0.*  |
 | 5.1   | 1.1.*  |
+| 5.3   | 1.3.*  |
 
 Download from packagist:
 
diff --git a/src/TinkerServiceProvider.php b/src/TinkerServiceProvider.php
index b3de2d3..779f01b 100644
--- a/src/TinkerServiceProvider.php
+++ b/src/TinkerServiceProvider.php
@@ -17,7 +17,7 @@ class TinkerServiceProvider extends ServiceProvider
     public function register()
     {
         $this->commands([
-            'Vluzrmos\Tinker\TinkerCommand',
+            TinkerCommand::class,
         ]);
     }
 }
diff --git a/src/TinkerShell.php b/src/TinkerShell.php
index 6869fc8..5a8619b 100644
--- a/src/TinkerShell.php
+++ b/src/TinkerShell.php
@@ -9,6 +9,9 @@
 namespace Vluzrmos\Tinker;
 
 use Illuminate\Contracts\Console\Kernel as Console;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Support\Collection;
+use Laravel\Lumen\Application;
 use Psy\Configuration;
 use Psy\Shell;
 
@@ -88,9 +91,9 @@ public function getShell()
     protected function getCasters()
     {
         return [
-            'Laravel\Lumen\Application' => 'Vluzrmos\Tinker\TinkerCaster::castApplication',
-            'Illuminate\Support\Collection' => 'Vluzrmos\Tinker\TinkerCaster::castCollection',
-            'Illuminate\Database\Eloquent\Model' => 'Vluzrmos\Tinker\TinkerCaster::castModel',
+            Application::class => 'Vluzrmos\Tinker\TinkerCaster::castApplication',
+            Collection::class => 'Vluzrmos\Tinker\TinkerCaster::castCollection',
+            Model::class => 'Vluzrmos\Tinker\TinkerCaster::castModel',
         ];
     }