diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0c312bc..1d1267d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,7 +8,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest]
-        php-version: ['5.6', '7.0', '7.1', '7.2', '7.3', '7.4', '8.0']
+        php-version: ['7.1', '7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3', '8.4']
     name: PHP ${{ matrix.php-version }} on ${{ matrix.os }}
 
     steps:
diff --git a/bin/update-tests b/bin/update-tests
index d1f7145..f1e3f48 100644
--- a/bin/update-tests
+++ b/bin/update-tests
@@ -2,7 +2,7 @@
 # This file updates tests according to the phpunit library used for current php version, or php version in 1st argument.
 # Usage:
 #   update-tests - to update tests according to the phpunit library used for current php version.
-#   update-tests x.x - to update tests according to the phpunit library used for specific php version x.x, where x.x = 5.6|7.0|7.1|7.2|7.3|7.4|8.0.
+#   update-tests x.x - to update tests according to the phpunit library used for specific php version x.x, where x.x = 5.6|7.0|7.1|7.2|7.3|7.4|8.0|8.1|8.2|8.3|8.4.
 
 # Directory with phpunit tests.
 TEST_DIR="tests"
@@ -14,7 +14,7 @@ else
 fi
 
 if [[ $1 == '' && $DEV_MODE != '1' ]]; then
-  echo "Script works with composer in dev mode only."
+#  Script works with composer in dev mode only.
   exit 0
 fi
 
@@ -52,7 +52,7 @@ elif [[ $PHP_VERSION == '7.1' ]]; then
   PHP_UNIT='7.5'
 elif [[ $PHP_VERSION == '7.2' ]]; then
   PHP_UNIT='8.5'
-elif [[ $PHP_VERSION == '7.3' || $PHP_VERSION == '7.4' || $PHP_VERSION == '8.0' ]]; then
+elif [[ $PHP_VERSION == '7.3' || $PHP_VERSION == '7.4' || $PHP_VERSION == '8.0' || $PHP_VERSION == '8.1' || $PHP_VERSION == '8.2' || $PHP_VERSION == '8.3' || $PHP_VERSION == '8.4' ]]; then
   PHP_UNIT='9.5'
 fi
 
diff --git a/changelog.md b/changelog.md
index 805344f..6805cd1 100644
--- a/changelog.md
+++ b/changelog.md
@@ -3,6 +3,13 @@ All notable changes to this project will be documented in this file. This projec
 
 ## [Unreleased][unreleased]
 
+## [1.5.0]
+### Added
+- Support for PHP 8.4.
+
+### Changed
+- The minimum required PHP version is now 7.2.
+
 ## [1.4.0]
 ### Added
 - PHP 8 compatibility and test coverage (thanks @kagg-design)
@@ -21,7 +28,7 @@ All notable changes to this project will be documented in this file. This projec
 
 ## [1.3.7]
 ### Fixed
-- issue that would generate en excpetion when providing an empty configuration to the `FunctionMocker::init` method
+- issue that would generate en exception when providing an empty configuration to the `FunctionMocker::init` method
 
 ## [1.3.6]
 ### Fixed
diff --git a/composer.json b/composer.json
index cf652f0..bf30b6c 100644
--- a/composer.json
+++ b/composer.json
@@ -10,9 +10,10 @@
   ],
   "minimum-stability": "stable",
   "require": {
-    "phpunit/phpunit": "5.7 - 9.5",
-    "antecedent/patchwork": "^2.0",
-    "lucatume/args": "^1.0"
+    "php": ">=7.1",
+    "phpunit/phpunit": "7.5 - 9.6",
+    "antecedent/patchwork": "^2.2.0",
+    "lucatume/args": "^1.0.1"
   },
   "autoload": {
     "psr-0": {
diff --git a/src/functions.php b/src/functions.php
index b6864d4..a0ca3f0 100644
--- a/src/functions.php
+++ b/src/functions.php
@@ -14,7 +14,7 @@
  * @see \Patchwork\configure()
  *
  */
-function init(array $options = null) {
+function init(?array $options = null) {
     FunctionMocker::init($options);
 }
 
diff --git a/src/tad/FunctionMocker/Call/Logger/LoggerInterface.php b/src/tad/FunctionMocker/Call/Logger/LoggerInterface.php
index f795afa..f59bed0 100644
--- a/src/tad/FunctionMocker/Call/Logger/LoggerInterface.php
+++ b/src/tad/FunctionMocker/Call/Logger/LoggerInterface.php
@@ -5,5 +5,5 @@
 interface LoggerInterface
 {
 
-    public function called(array $args = null);
+    public function called(?array $args = null);
 }
diff --git a/src/tad/FunctionMocker/Call/Logger/SpyCallLogger.php b/src/tad/FunctionMocker/Call/Logger/SpyCallLogger.php
index b34bdbb..e4b1d62 100644
--- a/src/tad/FunctionMocker/Call/Logger/SpyCallLogger.php
+++ b/src/tad/FunctionMocker/Call/Logger/SpyCallLogger.php
@@ -22,12 +22,12 @@ public function __construct()
             : '\\PHPUnit\\Framework\\Constraint\\Constraint';
     }
 
-    public function called(array $args = null)
+    public function called(?array $args = null)
     {
         $this->calls[] = CallTrace::fromArguments($args);
     }
 
-    public function getCallTimes(array $args = null)
+    public function getCallTimes(?array $args = null)
     {
         $calls = $this->calls;
         if ($args) {
diff --git a/src/tad/FunctionMocker/Call/Verifier/InstanceMethodCallVerifier.php b/src/tad/FunctionMocker/Call/Verifier/InstanceMethodCallVerifier.php
index 701ef42..7fc19ea 100644
--- a/src/tad/FunctionMocker/Call/Verifier/InstanceMethodCallVerifier.php
+++ b/src/tad/FunctionMocker/Call/Verifier/InstanceMethodCallVerifier.php
@@ -43,7 +43,7 @@ private function realWasCalledTimes( $times ) {
 	 *
 	 * @return array
 	 */
-	protected function getCallTimesWithArgs( $methodName, array $args = null ) {
+	protected function getCallTimesWithArgs( $methodName, ?array $args = null ) {
 		$invocations = $this->getInvocations();
 		$callTimes   = 0;
 		array_map( function ( $invocation ) use ( &$callTimes, $args, $methodName ) {
diff --git a/src/tad/FunctionMocker/CallTrace.php b/src/tad/FunctionMocker/CallTrace.php
index 2636eb8..91e09d1 100644
--- a/src/tad/FunctionMocker/CallTrace.php
+++ b/src/tad/FunctionMocker/CallTrace.php
@@ -7,7 +7,7 @@ class CallTrace
 
     protected $args;
 
-    public static function fromArguments(array $args = null)
+    public static function fromArguments(?array $args = null)
     {
         $instance = new self;
         $instance->args = $args ? $args : array();
diff --git a/src/tad/FunctionMocker/FunctionMocker.php b/src/tad/FunctionMocker/FunctionMocker.php
index 387b21f..4b9a4a2 100644
--- a/src/tad/FunctionMocker/FunctionMocker.php
+++ b/src/tad/FunctionMocker/FunctionMocker.php
@@ -54,7 +54,7 @@ public static function setUp() {
 	 *
 	 * @see \Patchwork\configure()
 	 */
-    public static function init(array $options = null, $forceReinit = false) {
+    public static function init(?array $options = null, $forceReinit = false) {
         if (!$forceReinit && self::$didInit) {
             return;
         }
@@ -300,7 +300,7 @@ private static function getIndexedReplacements($return) {
      *
      * @return mixed
      */
-    public static function callOriginal(array $args = null) {
+    public static function callOriginal(?array $args = null) {
         return \Patchwork\relay($args);
     }
 
@@ -367,7 +367,7 @@ public static function forge($class) {
 	 *
 	 * @throws \RuntimeException If the Patchwork configuration file or the checksum file could not be written.
 	 */
-	public static function writePatchworkConfig(array $options = null, $destinationFolder) {
+	public static function writePatchworkConfig(?array $options = null, $destinationFolder = '') {
 		$options = self::getPatchworkConfiguration($options, $destinationFolder);
 
 		$configFileContents = json_encode($options);
diff --git a/src/tad/FunctionMocker/Method/Verifier.php b/src/tad/FunctionMocker/Method/Verifier.php
index 3458a06..cc35c88 100644
--- a/src/tad/FunctionMocker/Method/Verifier.php
+++ b/src/tad/FunctionMocker/Method/Verifier.php
@@ -27,7 +27,7 @@ public function __construct()
     {
     }
 
-    public function __call($name, array $args = null)
+    public function __call($name, ?array $args = null)
     {
         return InstanceMethodCallVerifier::from($this->returnValue, $this->callLogger);
     }
diff --git a/src/tad/FunctionMocker/MockWrapper.php b/src/tad/FunctionMocker/MockWrapper.php
index 3bf1133..8376491 100644
--- a/src/tad/FunctionMocker/MockWrapper.php
+++ b/src/tad/FunctionMocker/MockWrapper.php
@@ -29,7 +29,12 @@ class MockWrapper
      */
     protected $classTemplate;
 
-    public function __construct($originalClassName = '', ClassTemplateInterface $classTemplate = null, MethodCodeInterface $methodCode = null)
+	/**
+	 * @var MethodCode|MethodCodeInterface
+	 */
+	private $methodCode;
+
+	public function __construct($originalClassName = '', ?ClassTemplateInterface $classTemplate = null, ?MethodCodeInterface $methodCode = null)
     {
         $this->originalClassName = $originalClassName;
         $this->classTemplate = $classTemplate ?: new ClassTemplate();
@@ -66,7 +71,7 @@ public function wrap($mockObject, $invokedRecorder, ReplacementRequest $request)
 	 * @throws \Exception
 	 *
 	 */
-    protected function getWrappedInstance($object, ExtenderInterface $extender, $invokedRecorder = null, ReplacementRequest $request = null)
+    protected function getWrappedInstance($object, ExtenderInterface $extender, $invokedRecorder = null, ?ReplacementRequest $request = null)
     {
         $mockClassName = get_class($object);
         $extendClassName = sprintf('%s_%s', uniqid('Extended_'), $mockClassName);
diff --git a/src/tad/FunctionMocker/PHPUnitFrameworkAssertWrapper.php b/src/tad/FunctionMocker/PHPUnitFrameworkAssertWrapper.php
index 764ee28..1e01340 100644
--- a/src/tad/FunctionMocker/PHPUnitFrameworkAssertWrapper.php
+++ b/src/tad/FunctionMocker/PHPUnitFrameworkAssertWrapper.php
@@ -32,7 +32,7 @@ public static function getTestCase()
      * @param array $args
      * @return mixed
      */
-    public static function __callStatic($name, array $args = null)
+    public static function __callStatic($name, ?array $args = null)
     {
         return call_user_func_array([self::getTestCase(), $name], $args);
     }
diff --git a/src/tad/FunctionMocker/Replacers/InstanceForger.php b/src/tad/FunctionMocker/Replacers/InstanceForger.php
index 78a24d6..34ee417 100644
--- a/src/tad/FunctionMocker/Replacers/InstanceForger.php
+++ b/src/tad/FunctionMocker/Replacers/InstanceForger.php
@@ -90,7 +90,7 @@ public function getPHPUnitMockObjectFor($className, array $methods)
      * @param $methodName
      * @param ReturnValue|null $returnValue
      */
-    public function setMockObjectExpectation(&$mockObject, $methodName, ReturnValue $returnValue = null)
+    public function setMockObjectExpectation(&$mockObject, $methodName, ?ReturnValue $returnValue = null)
     {
         if ($returnValue->isCallable()) {
             // callback