diff --git a/DependencyInjection/DoctrineMigrationToolsExtension.php b/DependencyInjection/DoctrineMigrationToolsExtension.php
index e84f019..4d6c9d0 100644
--- a/DependencyInjection/DoctrineMigrationToolsExtension.php
+++ b/DependencyInjection/DoctrineMigrationToolsExtension.php
@@ -2,6 +2,8 @@
 
 namespace A5sys\DoctrineMigrationToolsBundle\DependencyInjection;
 
+use Symfony\Component\Config\FileLocator;
+use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\HttpKernel\DependencyInjection\Extension;
 
@@ -17,5 +19,10 @@ public function load(array $configs, ContainerBuilder $container)
     {
         $configuration = new Configuration();
         $this->processConfiguration($configuration, $configs);
+
+        $locator = new FileLocator(__DIR__.'/../Resources/config/');
+        $loader  = new YamlFileLoader($container, $locator);
+
+        $loader->load('services.yml');
     }
 }
diff --git a/README.md b/README.md
index 0eec5b9..eb2a530 100644
--- a/README.md
+++ b/README.md
@@ -6,13 +6,13 @@ Tools for the doctrine migration bundle
 
     composer require a5sys/doctrine-migration-tools-bundle:dev-master
 
-# Generate versions from schema file for the doctrine-migration 
+# Generate versions from schema file for the doctrine-migration
 The diff command of doctrine generate the version file from the diff between your database and the current schema.
 
 This command generate the version from the diff between the schema stored in a file and your current schema.
 
 So you only have to run the command before doing a new version of your app.
 
-    php app/console doctrine:migrations:diff-file
+    php bin/console doctrine:migrations:diff-file
 
 A version file will be generated (if required) and your current schema will be dumped in a file. (in /app/DoctrineMigrations/SchemaVersion)
diff --git a/Resources/config/services.yml b/Resources/config/services.yml
new file mode 100644
index 0000000..537c1d8
--- /dev/null
+++ b/Resources/config/services.yml
@@ -0,0 +1,4 @@
+services:
+  A5sys\DoctrineMigrationToolsBundle\Command\MigrationsDiffFileDoctrineCommand:
+    public: false
+    tags: [console.command]
diff --git a/composer.json b/composer.json
index 3aff580..fa9fdfe 100644
--- a/composer.json
+++ b/composer.json
@@ -6,9 +6,9 @@
     },
     "license": "MIT",
     "require": {
-        "php": ">=5.4.0",
-        "symfony/framework-bundle": "~2.3|~3.0",
+        "php": ">=7.1",
+        "symfony/framework-bundle": "~4.0",
         "doctrine/doctrine-bundle": "~1.0",
-        "doctrine/migrations": "~1.4"
+        "doctrine/migrations": "~1.6"
     }
 }