diff --git a/.travis.yml b/.travis.yml
index 1778618..492949f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,5 @@
-dist: trusty
-sudo: false
+dist: bionic
+
 language: php
 
 php:
@@ -7,9 +7,10 @@ php:
   - '7.2'
   - '7.3'
   - '7.4'
+  - '8.0snapshot'
 
 before_script:
-  - composer install --dev
+  - composer update --no-interaction --no-progress
 
 script:
   - php bin/phpspec run -f pretty
diff --git a/README.md b/README.md
index 18d06bd..8576ec0 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ Simple object oriented wrapper for Packagist API.
 
 ## Requirements
 
-* PHP ^7.1
+* PHP `^7.1 || ^8.0`
 
 ## Installation
 
diff --git a/composer.json b/composer.json
index c1c77bc..b067184 100644
--- a/composer.json
+++ b/composer.json
@@ -12,12 +12,12 @@
         }
     ],
     "require": {
-        "php": ">=7.1",
-        "guzzlehttp/guzzle": "~6.0",
-        "doctrine/inflector": "~1.0 || ~2.0"
+        "php": "^7.1 || ^8.0",
+        "guzzlehttp/guzzle": "^6.0 || ^7.0",
+        "doctrine/inflector": "^1.0 || ^2.0"
     },
     "require-dev": {
-        "phpspec/phpspec": "~5.1 || ~6.0",
+        "phpspec/phpspec": "^5.1 || ^6.0 || ^7.0",
         "squizlabs/php_codesniffer": "^3.0"
     },
     "config": {
diff --git a/spec/Packagist/Api/ClientSpec.php b/spec/Packagist/Api/ClientSpec.php
index 4fbc802..79158f6 100644
--- a/spec/Packagist/Api/ClientSpec.php
+++ b/spec/Packagist/Api/ClientSpec.php
@@ -28,7 +28,7 @@ function it_search_for_packages(HttpClient $client, Factory $factory, Response $
         $data = file_get_contents('spec/Packagist/Api/Fixture/search.json');
         $response->getBody()->shouldBeCalled()->willReturn($data);
 
-        $client->request('get', 'https://packagist.org/search.json?q=sylius')->shouldBeCalled()->willReturn($response);
+        $client->request('GET', 'https://packagist.org/search.json?q=sylius')->shouldBeCalled()->willReturn($response);
         $factory->create(json_decode($data, true))->shouldBeCalled()->willReturn(array());
 
         $this->search('sylius');
@@ -39,7 +39,7 @@ function it_search_for_packages_with_limit(HttpClient $client, Factory $factory,
         $data = file_get_contents('spec/Packagist/Api/Fixture/search.json');
         $response->getBody()->shouldBeCalled()->willReturn($data);
 
-        $client->request('get', 'https://packagist.org/search.json?q=sylius')->shouldBeCalled()->willReturn($response);
+        $client->request('GET', 'https://packagist.org/search.json?q=sylius')->shouldBeCalled()->willReturn($response);
         $factory->create(json_decode($data, true))->shouldBeCalled()->willReturn(array());
 
         $this->search('sylius', [], 2);
@@ -50,7 +50,7 @@ function it_searches_for_packages_with_filters(HttpClient $client, Factory $fact
         $data = file_get_contents('spec/Packagist/Api/Fixture/search.json');
         $response->getBody()->shouldBeCalled()->willReturn($data);
 
-        $client->request('get', 'https://packagist.org/search.json?tag=storage&q=sylius')->shouldBeCalled()->willReturn($response);
+        $client->request('GET', 'https://packagist.org/search.json?tag=storage&q=sylius')->shouldBeCalled()->willReturn($response);
 
         $factory->create(json_decode($data, true))->shouldBeCalled()->willReturn(array());
 
@@ -62,7 +62,7 @@ function it_gets_popular_packages(HttpClient $client, Factory $factory, Response
         $data = file_get_contents('spec/Packagist/Api/Fixture/popular.json');
         $response->getBody()->shouldBeCalled()->willReturn($data);
 
-        $client->request('get', 'https://packagist.org/explore/popular.json?page=1')->shouldBeCalled()->willReturn($response);
+        $client->request('GET', 'https://packagist.org/explore/popular.json?page=1')->shouldBeCalled()->willReturn($response);
 
         $factory->create(json_decode($data, true))->shouldBeCalled()->willReturn(array_pad(array(), 5, null));
 
@@ -74,7 +74,7 @@ function it_gets_package_details(HttpClient $client, Factory $factory, Response
         $data = file_get_contents('spec/Packagist/Api/Fixture/get.json');
         $response->getBody()->shouldBeCalled()->willReturn($data);
 
-        $client->request('get', 'https://packagist.org/packages/sylius/sylius.json')->shouldBeCalled()->willReturn($response);
+        $client->request('GET', 'https://packagist.org/packages/sylius/sylius.json')->shouldBeCalled()->willReturn($response);
 
         $factory->create(json_decode($data, true))->shouldBeCalled();
 
@@ -86,7 +86,7 @@ function it_lists_all_package_names(HttpClient $client, Factory $factory, Respon
         $data = file_get_contents('spec/Packagist/Api/Fixture/all.json');
         $response->getBody()->shouldBeCalled()->willReturn($data);
 
-        $client->request('get', 'https://packagist.org/packages/list.json')->shouldBeCalled()->willReturn($response);
+        $client->request('GET', 'https://packagist.org/packages/list.json')->shouldBeCalled()->willReturn($response);
 
         $factory->create(json_decode($data, true))->shouldBeCalled();
 
@@ -98,7 +98,7 @@ function it_filters_package_names_by_type(HttpClient $client, Factory $factory,
         $data = file_get_contents('spec/Packagist/Api/Fixture/all.json');
         $response->getBody()->shouldBeCalled()->willReturn($data);
 
-        $client->request('get', 'https://packagist.org/packages/list.json?type=library')->shouldBeCalled()->willReturn($response);
+        $client->request('GET', 'https://packagist.org/packages/list.json?type=library')->shouldBeCalled()->willReturn($response);
 
         $factory->create(json_decode($data, true))->shouldBeCalled();
 
@@ -110,7 +110,7 @@ function it_filters_package_names_by_vendor(HttpClient $client, Factory $factory
         $data = file_get_contents('spec/Packagist/Api/Fixture/all.json');
         $response->getBody()->shouldBeCalled()->willReturn($data);
 
-        $client->request('get', 'https://packagist.org/packages/list.json?vendor=sylius')->shouldBeCalled()->willReturn($response);
+        $client->request('GET', 'https://packagist.org/packages/list.json?vendor=sylius')->shouldBeCalled()->willReturn($response);
 
         $factory->create(json_decode($data, true))->shouldBeCalled();
 
diff --git a/src/Packagist/Api/Client.php b/src/Packagist/Api/Client.php
index 00f4edb..9db99f5 100644
--- a/src/Packagist/Api/Client.php
+++ b/src/Packagist/Api/Client.php
@@ -199,7 +199,7 @@ protected function request($url)
         }
 
         return $this->httpClient
-            ->request('get', $url)
+            ->request('GET', $url)
             ->getBody();
     }