diff --git a/Resources/doc/cookbook/custom-repositories.md b/Resources/doc/cookbook/custom-repositories.md
index 9eff5f7..866f72d 100644
--- a/Resources/doc/cookbook/custom-repositories.md
+++ b/Resources/doc/cookbook/custom-repositories.md
@@ -4,7 +4,7 @@ As well as the default repository you can create a custom repository for an enti
 methods for particular searches. These need to extend `FOS\ElasticaBundle\Repository` to have
 access to the finder:
 
-```
+```php
 <?php
 
 namespace Acme\ElasticaBundle\SearchRepository;
@@ -23,37 +23,41 @@ class UserRepository extends Repository
 
 To use the custom repository specify it in the mapping for the entity:
 
-    fos_elastica:
-        clients:
-            default: { host: localhost, port: 9200 }
-        indexes:
-            website:
-                client: default
-                types:
-                    user:
-                        mappings:
-                            # your mappings
-                        persistence:
-                            driver: orm
-                            model: Application\UserBundle\Entity\User
-                            provider: ~
-                            finder: ~
-                            repository: Acme\ElasticaBundle\SearchRepository\UserRepository
+```yaml
+fos_elastica:
+    clients:
+        default: { host: localhost, port: 9200 }
+    indexes:
+        website:
+            client: default
+            types:
+                user:
+                    mappings:
+                        # your mappings
+                    persistence:
+                        driver: orm
+                        model: Application\UserBundle\Entity\User
+                        provider: ~
+                        finder: ~
+                        repository: Acme\ElasticaBundle\SearchRepository\UserRepository
+```
 
 Then the custom queries will be available when using the repository returned from the manager:
 
-    /** var FOS\ElasticaBundle\Manager\RepositoryManager */
-    $repositoryManager = $container->get('fos_elastica.manager');
+```php
+/** var FOS\ElasticaBundle\Manager\RepositoryManager */
+$repositoryManager = $container->get('fos_elastica.manager');
 
-    /** var FOS\ElasticaBundle\Repository */
-    $repository = $repositoryManager->getRepository('UserBundle:User');
+/** var FOS\ElasticaBundle\Repository */
+$repository = $repositoryManager->getRepository('UserBundle:User');
 
-    /** var array of Acme\UserBundle\Entity\User */
-    $users = $repository->findWithCustomQuery('bob');
+/** var array of Acme\UserBundle\Entity\User */
+$users = $repository->findWithCustomQuery('bob');
+```
 
 Alternatively you can specify the custom repository using an annotation in the entity:
 
-```
+```php
 <?php
 
 namespace Application\UserBundle\Entity;
@@ -69,4 +73,4 @@ class User
    //---
 
 }
-```
\ No newline at end of file
+```