diff --git a/cookbook/symfony2/the-symfony2-security-component-and-propel.markdown b/cookbook/symfony2/the-symfony2-security-component-and-propel.markdown
index d2a50484..4472066b 100644
--- a/cookbook/symfony2/the-symfony2-security-component-and-propel.markdown
+++ b/cookbook/symfony2/the-symfony2-security-component-and-propel.markdown
@@ -11,13 +11,29 @@ If you've started to play with the awesome Symfony2 Security Component, you'll k
 to retrieve your users. Symfony2, and the PropelBundle provide a `propel` provider, so you just need to add the following
 configuration to your `security.yml` file:
 
-``` yaml
+{% highlight yaml %}
+# app/config/security.yml
 providers:
     main:
         propel:
             class: My\AwesomeBundle\Model\User
             property: username
-```
+{% endhighlight %}
+
+Your `User` class have to implement the [`UserInterface`](https://github.com/symfony/symfony/blob/master/src/Symfony/Component/Security/Core/User/UserInterface.php):
+
+{% highlight php %}
+<?php
+// src/My/AwesomeBundle/Model/User.php
+
+use Symfony\Component\Security\Core\User\UserInterface;
+
+class User extends BaseUser implements UserInterface
+{
+}
+{% endhighlight %}
+
+That's all!
 
 
 ## ACL implementation ##
diff --git a/cookbook/symfony2/working-with-symfony2.markdown b/cookbook/symfony2/working-with-symfony2.markdown
index 742e8af1..09d505c3 100644
--- a/cookbook/symfony2/working-with-symfony2.markdown
+++ b/cookbook/symfony2/working-with-symfony2.markdown
@@ -542,9 +542,11 @@ If you want to remove parts of a schema, you only need to add an empty schema fi
 The `PropelBundle` provides a model-based implementation of the Security components' interfaces.
 To make use of this `AuditableAclProvider` you only need to change your security configuration.
 
-    security:
-        acl:
-            provider: propel.security.acl.provider
+{% highlight yaml %}
+security:
+    acl:
+        provider: propel.security.acl.provider
+{% endhighlight %}
 
 This will switch the provider to be the `AuditableAclProvider` of the `PropelBundle`.
 
@@ -558,13 +560,15 @@ If you already got an ACL database, the schema of the `PropelBundle` is compatib
 
 In case you want to use a different database for your ACL than your business model, you only need to configure this service.
 
-    services:
-        propel.security.acl.connection:
-            class: PropelPDO
-            factory_class: Propel
-            factory_method: getConnection
-            arguments:
-                - "acl"
+{% highlight yaml %}
+services:
+    propel.security.acl.connection:
+        class: PropelPDO
+        factory_class: Propel
+        factory_method: getConnection
+        arguments:
+            - "acl"
+{% endhighlight %}
 
 The `PropelBundle` looks for this service, and if given uses the provided connection for all ACL related operations.
 The given argument (`acl` in the example) is the name of the connection to use, as defined in your runtime configuration.