diff --git a/ChillMainBundle.php b/ChillMainBundle.php
index 2b4b4649b..7cd34037c 100644
--- a/ChillMainBundle.php
+++ b/ChillMainBundle.php
@@ -6,7 +6,7 @@ use Symfony\Component\HttpKernel\Bundle\Bundle;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Chill\MainBundle\DependencyInjection\SearchableServicesCompilerPass;
 use Chill\MainBundle\DependencyInjection\ConfigConsistencyCompilerPass;
-use Chill\MainBundle\DependencyInjection\TimelineCompilerClass;
+use Chill\MainBundle\DependencyInjection\CompilerPass\TimelineCompilerClass;
 use Chill\MainBundle\DependencyInjection\RoleProvidersCompilerPass;
 use Chill\MainBundle\DependencyInjection\CompilerPass\ExportsCompilerPass;
 use Chill\MainBundle\DependencyInjection\CompilerPass\WidgetsCompilerPass;
diff --git a/DependencyInjection/ChillMainExtension.php b/DependencyInjection/ChillMainExtension.php
index d33ef4eb9..92092d889 100644
--- a/DependencyInjection/ChillMainExtension.php
+++ b/DependencyInjection/ChillMainExtension.php
@@ -120,6 +120,7 @@ class ChillMainExtension extends Extension implements PrependExtensionInterface,
         $loader->load('services/phonenumber.yml');
         $loader->load('services/cache.yml');
         $loader->load('services/templating.yml');
+        $loader->load('services/timeline.yml');
                 
         $this->configureCruds($container, $config['cruds'], $loader);
     }
diff --git a/DependencyInjection/TimelineCompilerClass.php b/DependencyInjection/CompilerPass/TimelineCompilerClass.php
similarity index 83%
rename from DependencyInjection/TimelineCompilerClass.php
rename to DependencyInjection/CompilerPass/TimelineCompilerClass.php
index 92aaaa003..d5b8efbde 100644
--- a/DependencyInjection/TimelineCompilerClass.php
+++ b/DependencyInjection/CompilerPass/TimelineCompilerClass.php
@@ -17,28 +17,28 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-namespace Chill\MainBundle\DependencyInjection;
+namespace Chill\MainBundle\DependencyInjection\CompilerPass;
 
 use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Reference;
 
 /**
  * Add services taggued with  `name: chill.timeline` to 
  * timeline_builder service definition
  *
- * @author Julien Fastré <julien.fastre@champs-libres.coop>
  */
 class TimelineCompilerClass implements CompilerPassInterface
 {
     public function process(ContainerBuilder $container)
     {
-        if (!$container->hasDefinition('chill.main.timeline_builder')) {
-            throw new \LogicException('service chill.main.timeline_builder '
+        if (!$container->hasDefinition('chill_main.timeline_builder')) {
+            throw new \LogicException('service chill_main.timeline_builder '
                     . 'is not defined.');
         }
         
         $definition = $container->getDefinition(
-            'chill.main.timeline_builder'
+            'chill_main.timeline_builder'
         );
 
         $taggedServices = $container->findTaggedServiceIds(
@@ -56,7 +56,7 @@ class TimelineCompilerClass implements CompilerPassInterface
 
                 $definition->addMethodCall(
                     'addProvider',
-                    array($attributes["context"], $id)
+                    array($attributes["context"], $id, new Reference($id))
                 );
             }
         }
diff --git a/Resources/config/services.yml b/Resources/config/services.yml
index 9fdbd6a62..3f2c59506 100644
--- a/Resources/config/services.yml
+++ b/Resources/config/services.yml
@@ -40,14 +40,6 @@ services:
     chill.main.search_provider:
         class: Chill\MainBundle\Search\SearchProvider
         public: true
-        
-    chill.main.timeline_builder:
-        class: Chill\MainBundle\Timeline\TimelineBuilder
-        arguments:
-            - "@doctrine.orm.entity_manager"
-        public: true
-        calls:
-            - [ setContainer, ["@service_container"]]
 
     chill.main.validator.role_scope_scope_presence:
         class: Chill\MainBundle\Validation\Validator\RoleScopeScopePresence
diff --git a/Resources/config/services/pagination.yml b/Resources/config/services/pagination.yml
index 95ea5a387..ca9b50e4f 100644
--- a/Resources/config/services/pagination.yml
+++ b/Resources/config/services/pagination.yml
@@ -1,7 +1,6 @@
 services:
     chill_main.paginator_factory:
         class: Chill\MainBundle\Pagination\PaginatorFactory
-        public: true   # TODO sf4 check if service is public or if container is must be loaded via __constuct
         arguments:
             - "@request_stack"
             - "@router"
diff --git a/Resources/config/services/timeline.yml b/Resources/config/services/timeline.yml
new file mode 100644
index 000000000..241f6a6f1
--- /dev/null
+++ b/Resources/config/services/timeline.yml
@@ -0,0 +1,7 @@
+services:
+    chill_main.timeline_builder:
+        class: Chill\MainBundle\Timeline\TimelineBuilder
+        arguments:
+            - "@doctrine.orm.entity_manager"
+        calls:
+            - [ setContainer, ["@service_container"]]
\ No newline at end of file
diff --git a/Timeline/TimelineBuilder.php b/Timeline/TimelineBuilder.php
index eb95d6c1c..1c5f364e2 100644
--- a/Timeline/TimelineBuilder.php
+++ b/Timeline/TimelineBuilder.php
@@ -40,17 +40,29 @@ class TimelineBuilder implements ContainerAwareInterface
      */
     private $em;
     
+    /**
+     * Record provider
+     * 
+     * This array has the structure `[ 'service id' => $service ]`
+     *
+     * @var TimelineProviderInterface[]
+     */
+    private $providers = [];
+    
+    /**
+     * Record provider and their context
+     * 
+     * This array has the structure `[ 'context' => [ 'service id' ] ]`
+     *
+     * @var array
+     */
+    private $providersByContext = [];
+    
     public function __construct(EntityManagerInterface $em)
     {
         $this->em = $em;
     }
     
-    /**
-     *
-     * @var string references to providers services
-     */
-    private $providers = array();
-    
     /**
      * return an HTML string with timeline
      *
@@ -108,9 +120,10 @@ class TimelineBuilder implements ContainerAwareInterface
      * @param string $context the context of the service
      * @param string $id the
      */
-    public function addProvider($context, $id)
+    public function addProvider($context, $id, TimelineProviderInterface $provider)
     {
-        $this->providers[$context][] = $id;
+        $this->providersByContext[$context][] = $id;
+        $this->providers[$id] = $provider;
     }
     
     /**
@@ -121,10 +134,16 @@ class TimelineBuilder implements ContainerAwareInterface
      */
     public function getProvidersByContext($context)
     {
-        $providers = array();
+        //throw an exception if no provider have been defined for this context
+        if (!array_key_exists($context, $this->providersByContext)) {
+            throw new \LogicException(sprintf('No builders have been defined for "%s"'
+                    . ' context', $context));
+        }
+    
+        $providers = [];
         
-        foreach($this->providers[$context] as $providerId) {
-            $providers[] = $this->container->get($providerId);
+        foreach($this->providersByContext[$context] as $providerId) {
+            $providers[] = $this->providers[$providerId];
         }
         
         return $providers;
@@ -144,12 +163,6 @@ class TimelineBuilder implements ContainerAwareInterface
      */
     private function buildUnionQuery($context, array $args)
     {
-        //throw an exception if no provider have been defined for this context
-        if (!array_key_exists($context, $this->providers)) {
-            throw new \LogicException(sprintf('No builders have been defined for "%s"'
-                    . ' context', $context));
-        }
-        
         //append SELECT queries with UNION keyword between them
         $union = '';
         foreach($this->getProvidersByContext($context) as $provider) {