diff --git a/src/Wallabag/CoreBundle/DependencyInjection/WallabagCoreExtension.php b/src/Wallabag/CoreBundle/DependencyInjection/WallabagCoreExtension.php
index 7cc4165ef..c6ecc99e0 100644
--- a/src/Wallabag/CoreBundle/DependencyInjection/WallabagCoreExtension.php
+++ b/src/Wallabag/CoreBundle/DependencyInjection/WallabagCoreExtension.php
@@ -3,7 +3,7 @@
 namespace Wallabag\CoreBundle\DependencyInjection;
 
 use Symfony\Component\DependencyInjection\ContainerBuilder;
-use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
+use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
 use Symfony\Component\HttpKernel\DependencyInjection\Extension;
 use Symfony\Component\Config\FileLocator;
 
@@ -11,8 +11,8 @@ class WallabagCoreExtension extends Extension
 {
     public function load(array $configs, ContainerBuilder $container)
     {
-        $loader = new XmlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
-        $loader->load('services.xml');
+        $loader = new YamlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
+        $loader->load('services.yml');
     }
 
     public function getAlias()
diff --git a/src/Wallabag/CoreBundle/Resources/config/services.xml b/src/Wallabag/CoreBundle/Resources/config/services.xml
deleted file mode 100644
index ca2ba3830..000000000
--- a/src/Wallabag/CoreBundle/Resources/config/services.xml
+++ /dev/null
@@ -1,29 +0,0 @@
-<?xml version="1.0" ?>
-
-<container xmlns="http://symfony.com/schema/dic/services"
-    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-    xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">
-
-    <services>
-        <!-- Twig -->
-        <service id="wallabag_core.twig.wallabag" class="Wallabag\CoreBundle\Twig\Extension\WallabagExtension">
-            <tag name="twig.extension" />
-        </service>
-
-        <!-- Security -->
-        <service id="wsse.security.authentication.provider"
-                 class="Wallabag\CoreBundle\Security\Authentication\Provider\WsseProvider" public="false">
-            <argument /> <!-- User Provider -->
-            <argument>%kernel.cache_dir%/security/nonces</argument>
-        </service>
-
-        <service id="wsse.security.authentication.listener"
-                 class="Wallabag\CoreBundle\Security\Firewall\WsseListener" public="false">
-            <argument type="service" id="security.context"/>
-            <argument type="service" id="security.authentication.manager" />
-            <argument type="service" id="logger" />
-            <tag name="monolog.logger" channel="wsse" />
-        </service>
-    </services>
-
-</container>
diff --git a/src/Wallabag/CoreBundle/Resources/config/services.yml b/src/Wallabag/CoreBundle/Resources/config/services.yml
new file mode 100644
index 000000000..b066c1a3b
--- /dev/null
+++ b/src/Wallabag/CoreBundle/Resources/config/services.yml
@@ -0,0 +1,15 @@
+services:
+    wallabag_core.twig.wallabag:
+        class: Wallabag\CoreBundle\Twig\Extension\WallabagExtension
+        tags:
+            - { name: twig.extension }
+    wsse.security.authentication.provider:
+        class: Wallabag\CoreBundle\Security\Authentication\Provider\WsseProvider
+        public: false
+        arguments: ['', '%kernel.cache_dir%/security/nonces']
+    wsse.security.authentication.listener:
+        class: Wallabag\CoreBundle\Security\Firewall\WsseListener
+        public: false
+        tags:
+            - { name: monolog.logger, channel: wsse }
+        arguments: ['@security.context', '@security.authentication.manager', '@logger']