diff --git a/.travis.yml b/.travis.yml
index ed44ad0..97254a6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,7 @@ language: php
 
 php:
     - 7.2
+    - 7.3
 
 env:
     global:
diff --git a/README.md b/README.md
index dac3e0b..1538867 100644
--- a/README.md
+++ b/README.md
@@ -86,3 +86,4 @@ services:
         arguments: [ "%twilio.username%", "%twilio.password%", ~, ~, '@twilio.http.client']
 
 ```
+
diff --git a/composer.json b/composer.json
index 4589f2e..6abdd52 100644
--- a/composer.json
+++ b/composer.json
@@ -17,7 +17,7 @@
   ],
   "require": {
     "php": ">=5.6",
-    "symfony/framework-bundle": "~2.3||~3",
+    "symfony/framework-bundle": "~2.3||~3||~4",
     "twig/twig": "~1.24||~2",
     "kriswallsmith/buzz": "<0.16"
   },
@@ -29,7 +29,7 @@
     "sebastian/phpcpd": "^4.0",
     "leanphp/phpspec-code-coverage": "^4.2",
     "php-coveralls/php-coveralls": "^2.1",
-    "symfony/expression-language": "~2.3||~3",
+    "symfony/expression-language": "~2.3||~3||~4",
     "twilio/sdk": "^5.19"
   },
   "autoload": {
diff --git a/spec/Proxy/Twilio/CurlClientSpec.php b/spec/Proxy/Twilio/CurlClientSpec.php
index 4192c73..48bc69d 100644
--- a/spec/Proxy/Twilio/CurlClientSpec.php
+++ b/spec/Proxy/Twilio/CurlClientSpec.php
@@ -2,6 +2,7 @@
 
 namespace spec\Nixilla\Api\LoggerBundle\Proxy\Twilio;
 
+use Nixilla\Api\LoggerBundle\Logger\ApiInterface;
 use Nixilla\Api\LoggerBundle\Proxy\Twilio\CurlClient;
 use PhpSpec\ObjectBehavior;
 use Prophecy\Argument;
@@ -12,4 +13,23 @@ function it_is_initializable()
     {
         $this->shouldHaveType(CurlClient::class);
     }
+
+    function it_monitors_http_requests(ApiInterface $logger)
+    {
+        $this->setLogger($logger);
+
+        $logger->logCall(
+            Argument::any(),
+            Argument::any(),
+            Argument::any(),
+            Argument::any(),
+            Argument::any(),
+            Argument::any(),
+            Argument::any(),
+            Argument::any()
+        )->shouldBeCalled()
+        ;
+
+        $this->request('GET', 'http://packagist.org', [], [], ['Content-Type' => 'text/plain'])->shouldNotReturn(null);
+    }
 }