diff --git a/.travis.yml b/.travis.yml
index 704ae61c..48dad698 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,22 +22,15 @@ matrix:
     include:
           # Minimum supported Symfony version and latest PHP version
         - php: 7.3
-          env: COMPOSER_FLAGS="--prefer-stable --prefer-lowest" SYMFONY_DEPRECATIONS_HELPER="weak" SYMFONY_PHPUNIT_VERSION="5.7"
+          env: COMPOSER_FLAGS="--prefer-stable --prefer-lowest" SYMFONY_DEPRECATIONS_HELPER="weak"
 
           # Test the latest stable release
-        - php: 5.5
-          env: SYMFONY_PHPUNIT_VERSION="5.7"
-        - php: 5.6
-          env: SYMFONY_PHPUNIT_VERSION="5.7"
-        - php: 7.0
         - php: 7.1
         - php: 7.2
         - php: 7.3
           env: COVERAGE=true TEST_COMMAND="composer test-ci"
 
           # Test LTS versions
-        - php: 7.3
-          env: DEPENDENCIES="dunglas/symfony-lock:^2"
         - php: 7.3
           env: DEPENDENCIES="dunglas/symfony-lock:^3"
         - php: 7.3
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 07f76616..27360216 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,13 @@
 
 The change log describes what is "Added", "Removed", "Changed" or "Fixed" between each release.
 
+## 1.16.0 - unreleased
+
+### Changed
+
+- Dropped support for PHP < 7.1
+- Dropped support for Symfony 2 
+
 ### Added
 
 - Integration for VCR Plugin
diff --git a/composer.json b/composer.json
index 479bea70..018dd1be 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,7 @@
         }
     ],
     "require": {
-        "php": "^5.5 || ^7.0",
+        "php": "^7.1",
         "php-http/client-common": "^1.9 || ^2.0",
         "php-http/client-implementation": "^1.0",
         "php-http/discovery": "^1.0",
@@ -26,15 +26,15 @@
         "php-http/message-factory": "^1.0.2",
         "php-http/stopwatch-plugin": "^1.2",
         "psr/http-message": "^1.0",
-        "symfony/config": "^2.8.49 || ^3.0.9 || ^3.1.10 || ^3.2.14 || ^3.3.18 || ^3.4.20 || ^4.0.15 || ^4.1.9 || ^4.2.1",
-        "symfony/dependency-injection": "^2.8.49 || ^3.0.9 || ^3.1.10 || ^3.2.14 || ^3.3.18 || ^3.4.20 || ^4.0.15 || ^4.1.9 || ^4.2.1",
-        "symfony/event-dispatcher": "^2.8.49 || ^3.0.9 || ^3.1.10 || ^3.2.14 || ^3.3.18 || ^3.4.20 || ^4.0.15 || ^4.1.9 || ^4.2.1",
-        "symfony/http-kernel": "^2.8.49 || ^3.0.9 || ^3.1.10 || ^3.2.14 || ^3.3.18 || ^3.4.20 || ^4.0.15 || ^4.1.9 || ^4.2.1",
-        "symfony/options-resolver": "^2.8.49 || ^3.0.9 || ^3.1.10 || ^3.2.14 || ^3.3.18 || ^3.4.20 || ^4.0.15 || ^4.1.9 || ^4.2.1"
+        "symfony/config": "^3.4.20 || ^4.0.15 || ^4.1.9 || ^4.2.1",
+        "symfony/dependency-injection": "^3.4.20 || ^4.0.15 || ^4.1.9 || ^4.2.1",
+        "symfony/event-dispatcher": "^3.4.20 || ^4.0.15 || ^4.1.9 || ^4.2.1",
+        "symfony/http-kernel": "^3.4.20 || ^4.0.15 || ^4.1.9 || ^4.2.1",
+        "symfony/options-resolver": "^3.4.20 || ^4.0.15 || ^4.1.9 || ^4.2.1"
     },
     "require-dev": {
         "guzzlehttp/psr7": "^1.0",
-        "matthiasnoback/symfony-dependency-injection-test": "^1.1 || ^2.3",
+        "matthiasnoback/symfony-dependency-injection-test": "^3.0",
         "nyholm/nsa": "^1.1",
         "php-http/cache-plugin": "^1.6",
         "php-http/guzzle6-adapter": "^1.1.1 || ^2.0.1",
@@ -42,15 +42,15 @@
         "php-http/promise": "^1.0",
         "php-http/vcr-plugin": "^1.0@dev",
         "polishsymfonycommunity/symfony-mocker-container": "^1.0",
-        "symfony/browser-kit": "^2.8.49 || ^3.0.9 || ^3.1.10 || ^3.2.14 || ^3.3.18 || ^3.4.20 || ^4.0.15 || ^4.1.9 || ^4.2.1",
-        "symfony/cache": "^3.1.10 || ^3.2.14 || ^3.3.18 || ^3.4.20 || ^4.0.15 || ^4.1.9 || ^4.2.1",
-        "symfony/dom-crawler": "^2.8.49 || ^3.0.9 || ^3.1.10 || ^3.2.14 || ^3.3.18 || ^3.4.20 || ^4.0.15 || ^4.1.9 || ^4.2.1",
-        "symfony/framework-bundle": "^2.8.1 || ^3.0.1 || ^4.0",
-        "symfony/http-foundation": "^2.8.49 || ^3.0.9 || ^3.1.10 || ^3.2.14 || ^3.3.18 || ^3.4.20 || ^4.0.15 || ^4.1.9 || ^4.2.1",
+        "symfony/browser-kit": "^3.4.20 || ^4.0.15 || ^4.1.9 || ^4.2.1",
+        "symfony/cache": "^3.4.20 || ^4.0.15 || ^4.1.9 || ^4.2.1",
+        "symfony/dom-crawler": "^3.4.20 || ^4.0.15 || ^4.1.9 || ^4.2.1",
+        "symfony/framework-bundle": "^3.4.0 || ^4.0",
+        "symfony/http-foundation": "^3.4.20 || ^4.0.15 || ^4.1.9 || ^4.2.1",
         "symfony/phpunit-bridge": "^3.4 || ^4.2",
-        "symfony/stopwatch": "^2.8.49 || ^3.0.9 || ^3.1.10 || ^3.2.14 || ^3.3.18 || ^3.4.20 || ^4.0.15 || ^4.1.9 || ^4.2.1",
-        "symfony/twig-bundle": "^2.8.49 || ^3.0.9 || ^3.1.10 || ^3.2.14 || ^3.3.18 || ^3.4.20 || ^4.0.15 || ^4.1.9 || ^4.2.1",
-        "symfony/web-profiler-bundle": "^2.8.49 || ^3.0.9 || ^3.1.10 || ^3.2.14 || ^3.3.18 || ^3.4.20 || ^4.0.15 || ^4.1.9 || ^4.2.1",
+        "symfony/stopwatch": "^3.4.20 || ^4.0.15 || ^4.1.9 || ^4.2.1",
+        "symfony/twig-bundle": "^3.4.20 || ^4.0.15 || ^4.1.9 || ^4.2.1",
+        "symfony/web-profiler-bundle": "^3.4.20 || ^4.0.15 || ^4.1.9 || ^4.2.1",
         "twig/twig": "^1.36 || ^2.6"
     },
     "conflict": {
diff --git a/src/DependencyInjection/Configuration.php b/src/DependencyInjection/Configuration.php
index d5027de4..f2982d35 100644
--- a/src/DependencyInjection/Configuration.php
+++ b/src/DependencyInjection/Configuration.php
@@ -768,7 +768,14 @@ private function createCachePluginNode()
             ->end()
         ;
 
-        $cache = $builder->root('cache');
+        $treeBuilder = new TreeBuilder('cache');
+        // Keep compatibility with symfony/config < 4.2
+        if (!method_exists($treeBuilder, 'getRootNode')) {
+            $cache = $treeBuilder->root('cache');
+        } else {
+            $cache = $treeBuilder->getRootNode();
+        }
+
         $cache
             ->canBeEnabled()
             ->info('Configure HTTP caching, requires the php-http/cache-plugin package')
diff --git a/tests/Functional/ServiceInstantiationTest.php b/tests/Functional/ServiceInstantiationTest.php
index 71852e04..3ebecb1a 100644
--- a/tests/Functional/ServiceInstantiationTest.php
+++ b/tests/Functional/ServiceInstantiationTest.php
@@ -17,6 +17,7 @@
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpKernel\Event\GetResponseEvent;
 use Symfony\Component\HttpKernel\HttpKernelInterface;
+use Symfony\Component\HttpKernel\Kernel;
 use Symfony\Component\HttpKernel\KernelEvents;
 use Symfony\Component\HttpKernel\Profiler\Profiler;
 
@@ -113,7 +114,11 @@ protected static function bootKernel(array $options = [])
 
         $event = new GetResponseEvent(static::$kernel, new Request(), HttpKernelInterface::MASTER_REQUEST);
 
-        $dispatcher->dispatch(KernelEvents::REQUEST, $event);
+        if (version_compare(Kernel::VERSION, '4.3.0', '>=')) {
+            $dispatcher->dispatch($event, KernelEvents::REQUEST);
+        } else {
+            $dispatcher->dispatch(KernelEvents::REQUEST, $event);
+        }
 
         return static::$kernel;
     }