diff --git a/Tests/Middleware/EventDispatchMiddlewareTest.php b/Tests/Middleware/EventDispatchMiddlewareTest.php
index 4e8ddf0..5a4dec8 100644
--- a/Tests/Middleware/EventDispatchMiddlewareTest.php
+++ b/Tests/Middleware/EventDispatchMiddlewareTest.php
@@ -11,7 +11,7 @@
 use Prophecy\Prophecy\ObjectProphecy;
 use Psr\Http\Message\RequestInterface;
 use Psr\Http\Message\ResponseInterface;
-use Symfony\Component\EventDispatcher\EventDispatcherInterface;
+use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;
 
 /**
  * Class EventDispatchMiddlewareTest
diff --git a/composer.json b/composer.json
index b54d36a..f2fc5a5 100644
--- a/composer.json
+++ b/composer.json
@@ -22,13 +22,13 @@
   "require": {
     "php":                          "^7.0",
     "guzzlehttp/guzzle":            "~6.0",
-    "symfony/dependency-injection": "~2.8|~3.0|~4.0",
-    "symfony/expression-language":  "~2.8|~3.0|~4.0",
-    "symfony/event-dispatcher":     "~2.8|~3.0|~4.0",
-    "symfony/http-kernel":          "~2.8|~3.0|~4.0",
-    "symfony/serializer":           "~2.8|~3.0|~4.0",
-    "symfony/property-access":      "~2.8|~3.0|~4.0",
-    "symfony/monolog-bundle":       "~2.8|~3.0|~4.0",
+    "symfony/dependency-injection": "~2.8|~3.0|~4.0|~5.0",
+    "symfony/expression-language":  "~2.8|~3.0|~4.0|~5.0",
+    "symfony/event-dispatcher":     "~2.8|~3.0|~4.0|~5.0",
+    "symfony/http-kernel":          "~2.8|~3.0|~4.0|~5.0",
+    "symfony/serializer":           "~2.8|~3.0|~4.0|~5.0",
+    "symfony/property-access":      "~2.8|~3.0|~4.0|~5.0",
+    "symfony/monolog-bundle":       "~2.8|~3.0",
     "psr/log":                      "~1.0"
   },
   "require-dev": {
diff --git a/src/DataCollector/RequestDataCollector.php b/src/DataCollector/RequestDataCollector.php
index b1d7599..c5c326d 100644
--- a/src/DataCollector/RequestDataCollector.php
+++ b/src/DataCollector/RequestDataCollector.php
@@ -22,7 +22,7 @@ class RequestDataCollector extends DataCollector
     /**
      * {@inheritdoc}Adds the requests to the data array of the Data Collector
      */
-    public function collect(Request $request, Response $response, \Exception $exception = null)
+    public function collect(Request $request, Response $response, \Throwable $exception = null)
     {
         $this->data['requests'] = $this->messages;
     }
diff --git a/src/DependencyInjection/Configuration.php b/src/DependencyInjection/Configuration.php
index 5dcde78..eeddad6 100644
--- a/src/DependencyInjection/Configuration.php
+++ b/src/DependencyInjection/Configuration.php
@@ -33,8 +33,13 @@ public function __construct(string $alias)
      */
     public function getConfigTreeBuilder()
     {
-        $builder = new TreeBuilder();
-        $builder->root($this->alias)
+        $builder = new TreeBuilder($this->alias);
+
+        $rootNode = method_exists($builder, 'getRootNode')
+            ? $builder->getRootNode()
+            : $builder->root($this->alias);
+
+        $rootNode
             ->children()
                 ->append($this->createClientsNode())->end()
             ->end();
@@ -49,8 +54,10 @@ public function getConfigTreeBuilder()
      */
     private function createClientsNode()
     {
-        $builder = new TreeBuilder();
-        $node    = $builder->root('clients');
+        $builder = new TreeBuilder('clients');
+        $node = method_exists($builder, 'getRootNode')
+            ? $builder->getRootNode()
+            : $builder->root('clients');
 
         $node
             ->useAttributeAsKey('name')
diff --git a/src/Events/PostTransactionEvent.php b/src/Events/PostTransactionEvent.php
index e4568af..e921f19 100644
--- a/src/Events/PostTransactionEvent.php
+++ b/src/Events/PostTransactionEvent.php
@@ -2,7 +2,7 @@
 namespace Mapudo\Bundle\GuzzleBundle\Events;
 
 use Psr\Http\Message\ResponseInterface;
-use Symfony\Component\EventDispatcher\Event;
+use Symfony\Contracts\EventDispatcher\Event;
 
 /**
  * Class PreTransactionEvent
diff --git a/src/Events/PreTransactionEvent.php b/src/Events/PreTransactionEvent.php
index 0f32a1e..3d4bcec 100644
--- a/src/Events/PreTransactionEvent.php
+++ b/src/Events/PreTransactionEvent.php
@@ -2,7 +2,7 @@
 namespace Mapudo\Bundle\GuzzleBundle\Events;
 
 use Psr\Http\Message\RequestInterface;
-use Symfony\Component\EventDispatcher\Event;
+use Symfony\Contracts\EventDispatcher\Event;
 
 /**
  * Class PreTransactionEvent
diff --git a/src/Middleware/EventDispatchMiddleware.php b/src/Middleware/EventDispatchMiddleware.php
index 2205461..43570b5 100644
--- a/src/Middleware/EventDispatchMiddleware.php
+++ b/src/Middleware/EventDispatchMiddleware.php
@@ -8,7 +8,7 @@
 use Mapudo\Bundle\GuzzleBundle\Events\GuzzleTransactionEventListenerInterface;
 use Psr\Http\Message\RequestInterface;
 use Psr\Http\Message\ResponseInterface;
-use Symfony\Component\EventDispatcher\EventDispatcherInterface;
+use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;
 
 /**
  * Class EventDispatchMiddleware
@@ -55,8 +55,8 @@ public function dispatch(): Closure
                 $this
                     ->eventDispatcher
                     ->dispatch(
-                        GuzzleTransactionEventListenerInterface::EVENT_PRE_TRANSACTION,
-                        $preTransactionEvent
+                        $preTransactionEvent,
+                        GuzzleTransactionEventListenerInterface::EVENT_PRE_TRANSACTION
                     );
 
                 /** @var PromiseInterface $promise */
@@ -68,8 +68,8 @@ function (ResponseInterface $response) {
                         $this
                             ->eventDispatcher
                             ->dispatch(
-                                GuzzleTransactionEventListenerInterface::EVENT_POST_TRANSACTION,
-                                $postTransactionEvent
+                                $postTransactionEvent,
+                                GuzzleTransactionEventListenerInterface::EVENT_POST_TRANSACTION
                             );
 
                         return $postTransactionEvent->getTransaction();