diff --git a/.gitignore b/.gitignore
index ea7c474c..830fae86 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@
 /.phpcs.cache
 /infection-log.txt
 /phpstan.neon
+/.phpunit.result.cache
diff --git a/.scrutinizer.yml b/.scrutinizer.yml
index 53e89b0d..a6619605 100644
--- a/.scrutinizer.yml
+++ b/.scrutinizer.yml
@@ -8,7 +8,7 @@ build:
                 rabbitmq: false
                 mongodb: false
                 php:
-                    version: 7.2
+                    version: 7.4
             cache:
                 disabled: false
                 directories:
diff --git a/.travis.yml b/.travis.yml
index 12ae7f13..a29a95f4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,7 +3,7 @@ language: php
 sudo: false
 
 php:
-  - 7.2
+  - 7.4
   - nightly
 
 cache:
diff --git a/README.md b/README.md
index 8856d787..31160e83 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 [![Latest Stable Version](https://img.shields.io/packagist/v/lcobucci/clock.svg?style=flat-square)](https://packagist.org/packages/lcobucci/clock)
 
 ![Branch master](https://img.shields.io/badge/branch-master-brightgreen.svg?style=flat-square)
-[![Build Status](https://img.shields.io/travis/lcobucci/clock/master.svg?style=flat-square)](http://travis-ci.org/#!/lcobucci/clock)
+[![Build Status](https://img.shields.io/travis/lcobucci/clock/master.svg?style=flat-square)](http://travis-ci.org/lcobucci/clock)
 [![Scrutinizer Code Quality](https://img.shields.io/scrutinizer/g/lcobucci/clock/master.svg?style=flat-square)](https://scrutinizer-ci.com/g/lcobucci/clock/?branch=master)
 [![Code Coverage](https://img.shields.io/scrutinizer/coverage/g/lcobucci/clock/master.svg?style=flat-square)](https://scrutinizer-ci.com/g/lcobucci/clock/?branch=master)
 [![SensioLabsInsight](https://insight.sensiolabs.com/projects/50e3ef67-0f42-48fe-ace5-0beb9f78d117/mini.png)](https://insight.sensiolabs.com/projects/50e3ef67-0f42-48fe-ace5-0beb9f78d117)
diff --git a/composer.json b/composer.json
index 55f9fc37..31051de8 100644
--- a/composer.json
+++ b/composer.json
@@ -10,16 +10,17 @@
         }
     ],
     "require": {
-        "php": "^7.2"
+        "php": "^7.4"
     },
     "require-dev": {
-        "infection/infection": "^0.13",
-        "lcobucci/coding-standard": "^1.0",
-        "phpstan/phpstan": "^0.10",
-        "phpstan/phpstan-deprecation-rules": "^0.10",
-        "phpstan/phpstan-phpunit": "^0.10",
-        "phpstan/phpstan-strict-rules": "^0.10",
-        "phpunit/phpunit": "^8.5.2"
+        "infection/infection": "^0.15",
+        "lcobucci/coding-standard": "^4.0",
+        "phpstan/extension-installer": "^1.0",
+        "phpstan/phpstan": "^0.12",
+        "phpstan/phpstan-deprecation-rules": "^0.12",
+        "phpstan/phpstan-phpunit": "^0.12",
+        "phpstan/phpstan-strict-rules": "^0.12",
+        "phpunit/phpunit": "^9.0"
     },
     "autoload": {
         "psr-4": {
diff --git a/phpstan.neon.dist b/phpstan.neon.dist
index 52d355a4..673b56c6 100644
--- a/phpstan.neon.dist
+++ b/phpstan.neon.dist
@@ -1,9 +1,3 @@
-includes:
-    - vendor/phpstan/phpstan-phpunit/extension.neon
-    - vendor/phpstan/phpstan-phpunit/rules.neon
-    - vendor/phpstan/phpstan-strict-rules/rules.neon
-    - vendor/phpstan/phpstan-deprecation-rules/rules.neon
-
 parameters:
     level: 7
     paths:
diff --git a/src/FrozenClock.php b/src/FrozenClock.php
index 4de161a5..c6b90cb4 100644
--- a/src/FrozenClock.php
+++ b/src/FrozenClock.php
@@ -7,10 +7,7 @@
 
 final class FrozenClock implements Clock
 {
-    /**
-     * @var DateTimeImmutable
-     */
-    private $now;
+    private DateTimeImmutable $now;
 
     public function __construct(DateTimeImmutable $now)
     {
diff --git a/src/SystemClock.php b/src/SystemClock.php
index 3d38ef4c..460d5bc1 100644
--- a/src/SystemClock.php
+++ b/src/SystemClock.php
@@ -9,14 +9,11 @@
 
 final class SystemClock implements Clock
 {
-    /**
-     * @var DateTimeZone
-     */
-    private $timezone;
+    private DateTimeZone $timezone;
 
     public function __construct(?DateTimeZone $timezone = null)
     {
-        $this->timezone = $timezone ?: new DateTimeZone(date_default_timezone_get());
+        $this->timezone = $timezone ?? new DateTimeZone(date_default_timezone_get());
     }
 
     public function now(): DateTimeImmutable
diff --git a/test/FrozenClockTest.php b/test/FrozenClockTest.php
index 6b85fbae..fa168094 100644
--- a/test/FrozenClockTest.php
+++ b/test/FrozenClockTest.php
@@ -27,6 +27,7 @@ public function nowShouldReturnAlwaysTheSameObject(): void
      * @test
      *
      * @covers \Lcobucci\Clock\FrozenClock::setTo
+     *
      * @uses   \Lcobucci\Clock\FrozenClock::__construct()
      * @uses   \Lcobucci\Clock\FrozenClock::now
      */