diff --git a/Twig/Node/TimelineActionThemeNode.php b/Twig/Node/TimelineActionThemeNode.php
index 4d0bb7d..1eae0a6 100644
--- a/Twig/Node/TimelineActionThemeNode.php
+++ b/Twig/Node/TimelineActionThemeNode.php
@@ -2,6 +2,8 @@
 
 namespace Spy\TimelineBundle\Twig\Node;
 
+use Spy\TimelineBundle\Twig\Extension\TimelineExtension;
+
 class TimelineActionThemeNode extends \Twig_Node
 {
     public function __construct(\Twig_NodeInterface $action, \Twig_NodeInterface $resources, array $attributes = array(), $lineno = 0, $tag = null)
@@ -16,7 +18,7 @@ public function compile(\Twig_Compiler $compiler)
     {
         $compiler
             ->addDebugInfo($this)
-            ->write('echo $this->env->getExtension(\'timeline_render\')->setTheme(')
+            ->write('echo $this->env->getExtension(\''.TimelineExtension::class.'\')->setTheme(')
             ->subcompile($this->getNode('action'))
             ->raw(', array(')
         ;
diff --git a/composer.json b/composer.json
index 0f94379..4007eb3 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,7 @@
         "atoum/atoum": "1.*|3.*",
         "doctrine/orm": "^2.6",
         "symfony/console": "~2.0|~3.0|~4.0",
-        "symfony/twig-bundle": "~2.0|~3.0|~4.0",
+        "symfony/twig-bundle": "~2.8.13|~3.0|~4.0",
         "symfony/expression-language": "~2.0|~3.0|~4.0"
     },
     "suggest": {