diff --git a/.travis.yml b/.travis.yml
index af68c8b..48a4e0a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,10 +5,9 @@ php:
   - 7.1
 
 env:
-  - SYMFONY_VERSION=2.3.*
-  - SYMFONY_VERSION=2.7.*
-  - SYMFONY_VERSION=2.8.*
-  - SYMFONY_VERSION=3.0.*
+  - SYMFONY_VERSION=4.4.*
+  - SYMFONY_VERSION=5.0.*
+  - SYMFONY_VERSION=5.3.*
       
 branches:
   only:
diff --git a/composer.json b/composer.json
index b992b49..11c3505 100644
--- a/composer.json
+++ b/composer.json
@@ -11,16 +11,19 @@
     ],
     "require": {
         "php": ">=7.0",
+        "ext-json": "*",
         "elasticsearch/elasticsearch": "^5.1.0||^6.0.0"
     },
     "require-dev": {
         "atoum/atoum":                      "^2.8||^3.0",
         "m6web/coke":                       "~1.2.0",
         "m6web/symfony2-coding-standard":   "~1.2.0",
-        "symfony/dependency-injection":     "^2.3||^3.0",
-        "symfony/event-dispatcher":         "^2.3||^3.0",
-        "symfony/config":                   "^2.3||^3.0",
-        "symfony/yaml":                     "^2.3||^3.0"
+        "symfony/dependency-injection":     "^4.4||^5.0",
+        "symfony/event-dispatcher":         "^4.4||^5.0",
+        "symfony/config":                   "^4.4||^5.0",
+        "symfony/yaml":                     "^4.4||^5.0",
+        "symfony/http-foundation":          "^4.4||^5.0",
+        "symfony/http-kernel":              "^4.4||^5.0"
     },
     "autoload": {
         "psr-0": { "": "src/" }
diff --git a/src/M6Web/Bundle/ElasticsearchBundle/DataCollector/ElasticsearchDataCollector.php b/src/M6Web/Bundle/ElasticsearchBundle/DataCollector/ElasticsearchDataCollector.php
index d605658..174c17d 100644
--- a/src/M6Web/Bundle/ElasticsearchBundle/DataCollector/ElasticsearchDataCollector.php
+++ b/src/M6Web/Bundle/ElasticsearchBundle/DataCollector/ElasticsearchDataCollector.php
@@ -43,7 +43,7 @@ public function handleEvent(ElasticsearchEvent $event)
     /**
      * {@inheritdoc}
      */
-    public function collect(Request $request, Response $response, \Exception $exception = null)
+    public function collect(Request $request, Response $response, \Throwable $exception = null)
     {
     }
 
diff --git a/src/M6Web/Bundle/ElasticsearchBundle/DependencyInjection/Configuration.php b/src/M6Web/Bundle/ElasticsearchBundle/DependencyInjection/Configuration.php
index 4692740..de22105 100644
--- a/src/M6Web/Bundle/ElasticsearchBundle/DependencyInjection/Configuration.php
+++ b/src/M6Web/Bundle/ElasticsearchBundle/DependencyInjection/Configuration.php
@@ -17,8 +17,8 @@ class Configuration implements ConfigurationInterface
      */
     public function getConfigTreeBuilder()
     {
-        $treeBuilder = new TreeBuilder();
-        $rootNode = $treeBuilder->root('m6web_elasticsearch');
+        $treeBuilder = new TreeBuilder('m6web_elasticsearch');
+        $rootNode = $treeBuilder->getRootNode();
 
         $rootNode
             ->children()
diff --git a/src/M6Web/Bundle/ElasticsearchBundle/DependencyInjection/M6WebElasticsearchExtension.php b/src/M6Web/Bundle/ElasticsearchBundle/DependencyInjection/M6WebElasticsearchExtension.php
index 2ec8cec..5f5dc08 100644
--- a/src/M6Web/Bundle/ElasticsearchBundle/DependencyInjection/M6WebElasticsearchExtension.php
+++ b/src/M6Web/Bundle/ElasticsearchBundle/DependencyInjection/M6WebElasticsearchExtension.php
@@ -147,14 +147,8 @@ protected function createHandler(ContainerBuilder $container, array $config, $de
      */
     private function setFactoryToDefinition($className, $method, Definition $definition)
     {
-        // Symfony 2.3 backward compatibility
-        if (method_exists('Symfony\Component\DependencyInjection\Definition', 'setFactory')) {
-            $definition->setFactory([$className, $method]);
-        } else {
-            $definition
-                ->setFactoryClass($className)
-                ->setFactoryMethod($method);
-        }
+        $definition
+            ->setFactory([$className, $method]);
     }
 
     /**
@@ -168,7 +162,7 @@ protected function createDataCollector(ContainerBuilder $container)
         $collectorDefinition->addTag(
             'data_collector',
             [
-                'template' => 'M6WebElasticsearchBundle:Collector:elasticsearch',
+                'template' => '@M6WebElasticsearch/Collector/elasticsearch.html.twig',
                 'id'       => 'elasticsearch'
             ]
         );
diff --git a/src/M6Web/Bundle/ElasticsearchBundle/EventDispatcher/ElasticsearchEvent.php b/src/M6Web/Bundle/ElasticsearchBundle/EventDispatcher/ElasticsearchEvent.php
index 43eb536..63486ab 100644
--- a/src/M6Web/Bundle/ElasticsearchBundle/EventDispatcher/ElasticsearchEvent.php
+++ b/src/M6Web/Bundle/ElasticsearchBundle/EventDispatcher/ElasticsearchEvent.php
@@ -4,7 +4,7 @@
 namespace M6Web\Bundle\ElasticsearchBundle\EventDispatcher;
 
 
-use Symfony\Component\EventDispatcher\Event;
+use Symfony\Contracts\EventDispatcher\Event;
 
 /**
  * Class ElasticsearchEvent
diff --git a/src/M6Web/Bundle/ElasticsearchBundle/Handler/EventHandler.php b/src/M6Web/Bundle/ElasticsearchBundle/Handler/EventHandler.php
index c0cc710..6648514 100644
--- a/src/M6Web/Bundle/ElasticsearchBundle/Handler/EventHandler.php
+++ b/src/M6Web/Bundle/ElasticsearchBundle/Handler/EventHandler.php
@@ -72,7 +72,7 @@ public function __invoke(array $request)
                 $event->setError($response['error']->getMessage());
             }
 
-            $this->eventDispatcher->dispatch('m6web.elasticsearch', $event);
+            $this->eventDispatcher->dispatch($event, 'm6web.elasticsearch');
 
             return $response;
         };
diff --git a/src/M6Web/Bundle/ElasticsearchBundle/Resources/views/Collector/elasticsearch.html.twig b/src/M6Web/Bundle/ElasticsearchBundle/Resources/views/Collector/elasticsearch.html.twig
index b549680..27b2775 100644
--- a/src/M6Web/Bundle/ElasticsearchBundle/Resources/views/Collector/elasticsearch.html.twig
+++ b/src/M6Web/Bundle/ElasticsearchBundle/Resources/views/Collector/elasticsearch.html.twig
@@ -1,4 +1,4 @@
-{% extends 'WebProfilerBundle:Profiler:layout.html.twig' %}
+{% extends '@WebProfiler/Profiler/layout.html.twig' %}
 
 {% block toolbar %}
     {% set icon %}
@@ -18,7 +18,7 @@
         <span>{{ '%0.2f'|format(collector.totalExecutionTime * 1000) }} ms</span>
     </div>
     {% endset %}
-    {% include 'WebProfilerBundle:Profiler:toolbar_item.html.twig' with {'link': profiler_url} %}
+    {% include '@WebProfiler/Profiler/toolbar_item.html.twig' with {'link': profiler_url} %}
 {% endblock %}
 
 {% block menu %}