diff --git a/.travis.yml b/.travis.yml
index f29481b..28dc454 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,7 +2,6 @@ language: php
 
 php:
   - 7.0
-  - 5.5
   - 5.6
   - 7.1
 
@@ -35,8 +34,8 @@ before_script:
   - sh -c "if [ '$PHPCS' = '1' ]; then composer require cakephp/cakephp-codesniffer; fi"
 
 script:
-  - if [[ $DEFAULT = 1 && $TRAVIS_PHP_VERSION = 7.* ]]; then phpunit --coverage-clover=clover.xml; fi
-  - if [[ $DEFAULT = 1 && $TRAVIS_PHP_VERSION != 7.* ]]; then phpunit; fi
+  - if [[ $DEFAULT = 1 && $TRAVIS_PHP_VERSION = 7.* ]]; then vendor/bin/phpunit --coverage-clover=clover.xml; fi
+  - if [[ $DEFAULT = 1 && $TRAVIS_PHP_VERSION != 7.* ]]; then vendor/bin/phpunit; fi
 
   - if [[ $PHPCS = 1 ]]; then vendor/bin/phpcs -p --extensions=php --standard=vendor/cakephp/cakephp-codesniffer/CakePHP ./src ./tests; fi
 
diff --git a/composer.json b/composer.json
index b8daf14..4d1c299 100644
--- a/composer.json
+++ b/composer.json
@@ -23,10 +23,11 @@
         "issues":"https://github.com/ADmad/cakephp-i18n/issues"
     },
     "require": {
-        "cakephp/cakephp": "~3.0"
+        "cakephp/cakephp": "^3.4"
     },
     "require-dev": {
-        "cakephp/cakephp": "~3.3"
+        "cakephp/cakephp": "^3.4",
+        "phpunit/phpunit": "<6.0"
     },
     "autoload": {
         "psr-4": {
@@ -43,6 +44,5 @@
             "dev-master": "1.0.x-dev"
         }
     },
-    "minimum-stability": "beta",
     "prefer-stable": true
 }
diff --git a/src/Middleware/I18nMiddleware.php b/src/Middleware/I18nMiddleware.php
index 6f9ab0b..2533541 100644
--- a/src/Middleware/I18nMiddleware.php
+++ b/src/Middleware/I18nMiddleware.php
@@ -112,8 +112,7 @@ public function detectLanguage(ServerRequestInterface $request, $default = null)
             $lang = $default;
         }
 
-        $cakeRequest = new Request();
-        $browserLangs = $cakeRequest->acceptLanguage();
+        $browserLangs = $request->acceptLanguage();
         foreach ($browserLangs as $k => $langKey) {
             if (strpos($langKey, '-') !== false) {
                 $browserLangs[$k] = substr($langKey, 0, 2);
diff --git a/tests/TestCase/Middleware/I18nMiddlewareTest.php b/tests/TestCase/Middleware/I18nMiddlewareTest.php
index ad905e7..359f082 100644
--- a/tests/TestCase/Middleware/I18nMiddlewareTest.php
+++ b/tests/TestCase/Middleware/I18nMiddlewareTest.php
@@ -2,12 +2,11 @@
 namespace ADmad\I18n\Test\TestCase\Middleware;
 
 use ADmad\I18n\Middleware\I18nMiddleware;
+use Cake\Http\Response;
 use Cake\Http\ServerRequestFactory;
 use Cake\I18n\I18n;
 use Cake\TestSuite\TestCase;
 use Locale;
-use Zend\Diactoros\Request;
-use Zend\Diactoros\Response;
 
 /**
  * I18nMiddleware test.
@@ -23,6 +22,8 @@ public function setUp()
     {
         parent::setUp();
 
+        $this->server = $_SERVER;
+
         $this->locale = Locale::getDefault();
 
         $this->config = [
@@ -30,9 +31,8 @@ public function setUp()
             'languages' => ['fr', 'en'],
         ];
 
-        $this->request = ServerRequestFactory::fromGlobals([
-            'REQUEST_URI' => '/',
-        ]);
+        $_SERVER['REQUEST_URI'] = '/';
+        $this->request = ServerRequestFactory::fromGlobals();
         $this->request = $this->request->withAttribute('webroot', '/');
         $this->response = new Response();
         $this->next = function ($req, $res) {
@@ -50,7 +50,7 @@ public function tearDown()
         parent::tearDown();
 
         Locale::setDefault($this->locale);
-        unset($_SERVER['HTTP_ACCEPT_LANGUAGE']);
+        $_SERVER = $this->server;
     }
 
     /**
@@ -68,9 +68,8 @@ public function testRedirectionFromSiteRoot()
         $this->assertEquals(301, $response->getStatusCode());
 
         $_SERVER['HTTP_ACCEPT_LANGUAGE'] = 'en-US,en;q=0.8,es;q=0.6,da;q=0.4';
-        $request = ServerRequestFactory::fromGlobals([
-            'REQUEST_URI' => '/',
-        ]);
+        $request = ServerRequestFactory::fromGlobals();
+        $request->webroot = '/';
         $middleware = new I18nMiddleware($this->config);
         $response = $middleware($request, $this->response, $this->next);
 
@@ -86,9 +85,8 @@ public function testRedirectionFromSiteRoot()
      */
     public function testLocaleSetting()
     {
-        $request = ServerRequestFactory::fromGlobals([
-            'REQUEST_URI' => '/fr',
-        ]);
+        $_SERVER['REQUEST_URI'] = '/fr';
+        $request = ServerRequestFactory::fromGlobals();
         $request = $request->withAttribute('params', ['lang' => 'fr']);
         $middleware = new I18nMiddleware($this->config);
         $response = $middleware($request, $this->response, $this->next);