diff --git a/.github/CONTRIBUTING.md b/.github/CONTRIBUTING.md
new file mode 100644
index 0000000000000000000000000000000000000000..7cedbff512dd96541e36ef86ddcc84b9e310f53d
--- /dev/null
+++ b/.github/CONTRIBUTING.md
@@ -0,0 +1,75 @@
+# Contributing to `sebastian/lines-of-code`
+
+## Welcome!
+
+We look forward to your contributions! Here are some examples how you can contribute:
+
+* [Report a bug](https://github.com/sebastianbergmann/lines-of-code/issues/new)
+* [Send a pull request to fix a bug](https://github.com/sebastianbergmann/lines-of-code/pulls)
+
+Please do not send pull requests that expand the scope of this project (see below).
+
+
+## Any contributions you make will be under the BSD-3-Clause License
+
+When you submit code changes, your submissions are understood to be under the same [BSD-3-Clause License](https://github.com/sebastianbergmann/lines-of-code/blob/main/LICENSE) that covers the project. By contributing to this project, you agree that your contributions will be licensed under its BSD-3-Clause License.
+
+
+## Write bug reports with detail, background, and sample code
+
+[This is an example](https://github.com/sebastianbergmann/phpunit/issues/4376) of a bug report I wrote, and I think it's not too bad.
+
+In your bug report, please provide the following:
+
+* A quick summary and/or background
+* Steps to reproduce
+    * Be specific!
+    * Give sample code if you can.
+* What you expected would happen
+* What actually happens
+* Notes (possibly including why you think this might be happening, or stuff you tried that didn't work)
+
+Please post code and output as text ([using proper markup](https://guides.github.com/features/mastering-markdown/)). Do not post screenshots of code or output.
+
+
+## Workflow for Pull Requests
+
+1. Fork the repository.
+2. Create your branch from the oldest branch that is affected by the bug you plan to fix.
+3. Implement your change and add tests for it.
+4. Ensure the test suite passes.
+5. Ensure the code complies with our coding guidelines (see below).
+6. Send that pull request!
+
+Please make sure you have [set up your username and email address](https://git-scm.com/book/en/v2/Getting-Started-First-Time-Git-Setup) for use with Git. Strings such as `silly nick name <root@localhost>` look really stupid in the commit history of a project.
+
+We encourage you to [sign your Git commits with your GPG key](https://docs.github.com/en/github/authenticating-to-github/signing-commits).
+
+
+## Development
+
+This project uses [PHPUnit](https://phpunit.de/) for testing:
+
+```shell
+./vendor/bin/phpunit
+```
+
+This project uses [PHPStan](https://phpstan.org/) for static analysis:
+
+```shell
+./tools/phpstan
+```
+
+This project uses [PHP-CS-Fixer](https://cs.symfony.com/) to enforce coding guidelines:
+
+```shell
+./tools/php-cs-fixer fix
+```
+
+The commands shown above require an autoloader script at `vendor/autoload.php`. This can be generated like so:
+
+```shell
+./tools/composer dump-autoload
+```
+
+Please understand that we will not accept a pull request when its changes violate this project's coding guidelines or break the test suite.
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1efe0b0edcbadf9e897f2da6e83a565ddf7ce330..356e2290f1a0b001f5d9788b54aace2ae1bdd1d8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,7 +7,7 @@ on:
 name: "CI"
 
 env:
-  COMPOSER_ROOT_VERSION: "3.0-dev"
+  COMPOSER_ROOT_VERSION: "4.0.x-dev"
 
 permissions:
   contents: read
@@ -61,9 +61,9 @@ jobs:
       fail-fast: false
       matrix:
         php-version:
-          - "8.2"
           - "8.3"
           - "8.4"
+          - "8.5"
 
     steps:
       - name: "Checkout"
@@ -73,15 +73,21 @@ jobs:
         uses: "shivammathur/setup-php@v2"
         with:
           php-version: "${{ matrix.php-version }}"
-          coverage: "pcov"
+          coverage: "xdebug"
 
       - name: "Install dependencies with Composer"
         run: "./tools/composer update --no-ansi --no-interaction --no-progress"
 
       - name: "Run tests with PHPUnit"
-        run: "vendor/bin/phpunit --coverage-clover=coverage.xml"
+        run: "vendor/bin/phpunit --log-junit junit.xml --coverage-clover=coverage.xml"
 
-      - name: "Send code coverage report to Codecov.io"
-        env:
-          CODECOV_TOKEN: "${{ secrets.CODECOV_TOKEN }}"
-        run: "bash <(curl -s https://codecov.io/bash) || true"
+      - name: Upload test results to Codecov.io
+        if: ${{ !cancelled() }}
+        uses: codecov/test-results-action@v1
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+
+      - name: Upload code coverage data to Codecov.io
+        uses: codecov/codecov-action@v4
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
diff --git a/.phive/phars.xml b/.phive/phars.xml
index 91ac82b19d700618690f300fafc4a0e38140d0f2..5c83e40d15ae1fd16636c419b90fb93d8472061d 100644
--- a/.phive/phars.xml
+++ b/.phive/phars.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phive xmlns="https://phar.io/phive">
-  <phar name="php-cs-fixer" version="^3.59" installed="3.59.3" location="./tools/php-cs-fixer" copy="true"/>
-  <phar name="infection" version="^0.29" installed="0.29.6" location="./tools/infection" copy="true"/>
-  <phar name="composer" version="^2.7" installed="2.7.7" location="./tools/composer" copy="true"/>
-  <phar name="phpstan" version="^1.11" installed="1.11.5" location="./tools/phpstan" copy="true"/>
+  <phar name="php-cs-fixer" version="^3.64" installed="3.68.0" location="./tools/php-cs-fixer" copy="true"/>
+  <phar name="infection" version="^0.29" installed="0.29.10" location="./tools/infection" copy="true"/>
+  <phar name="composer" version="^2.8" installed="2.8.4" location="./tools/composer" copy="true"/>
+  <phar name="phpstan" version="^2.0" installed="2.1.1" location="./tools/phpstan" copy="true"/>
 </phive>
diff --git a/.php-cs-fixer.dist.php b/.php-cs-fixer.dist.php
index 5690319737a1255cce0d3a4c2a1842ede75b34e1..3d66eed6f58d40ac4ffebb6ca0a99ef23c1fd70e 100644
--- a/.php-cs-fixer.dist.php
+++ b/.php-cs-fixer.dist.php
@@ -100,7 +100,7 @@ $config->setFinder($finder)
         'explicit_string_variable' => true,
         'fopen_flag_order' => true,
         'full_opening_tag' => true,
-        'fully_qualified_strict_types' => true,
+        'fully_qualified_strict_types' => ['import_symbols' => true],
         'function_declaration' => true,
         'function_to_constant' => true,
         'get_class_to_class_keyword' => true,
@@ -136,7 +136,7 @@ $config->setFinder($finder)
         'modernize_types_casting' => true,
         'multiline_comment_opening_closing' => true,
         'multiline_whitespace_before_semicolons' => true,
-        'native_constant_invocation' => false,
+        'native_constant_invocation' => true,
         'native_function_casing' => false,
         'native_function_invocation' => [
             'include' => [
@@ -159,7 +159,23 @@ $config->setFinder($finder)
         'no_empty_comment' => true,
         'no_empty_phpdoc' => true,
         'no_empty_statement' => true,
-        'no_extra_blank_lines' => true,
+        'no_extra_blank_lines' => [
+            'tokens' => [
+                'attribute',
+                'break',
+                'case',
+                'continue',
+                'curly_brace_block',
+                'default',
+                'extra',
+                'parenthesis_brace_block',
+                'return',
+                'square_brace_block',
+                'switch',
+                'throw',
+                'use',
+            ],
+        ],
         'no_homoglyph_names' => true,
         'no_leading_import_slash' => true,
         'no_leading_namespace_whitespace' => true,
@@ -198,6 +214,7 @@ $config->setFinder($finder)
         'no_whitespace_in_blank_line' => true,
         'non_printable_character' => true,
         'normalize_index_brace' => true,
+        'nullable_type_declaration_for_default_null_value' => true,
         'object_operator_without_whitespace' => true,
         'octal_notation' => true,
         'operator_linebreak' => [
@@ -341,6 +358,8 @@ $config->setFinder($finder)
         'whitespace_after_comma_in_array' => true,
     ]);
 
-$config->setCacheFile(__DIR__ . '/.php-cs-fixer.cache/' . sha1(@trim((string) @shell_exec('git rev-parse --abbrev-ref HEAD'))));
+$config->setCacheFile(__DIR__ . '/.php-cs-fixer.cache/' . json_decode((string) @file_get_contents('composer.json'), true)["extra"]["branch-alias"]["dev-main"] ?? 'unknown');
+
+$config->setParallelConfig(\PhpCsFixer\Runner\Parallel\ParallelConfigFactory::detect());
 
 return $config;
diff --git a/ChangeLog.md b/ChangeLog.md
index d4e0905b0463c99d5daa63a906bdb750142d6e68..4e724be6f86975406177b358407b6d6cc16c5018 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -2,6 +2,12 @@
 
 All notable changes are documented in this file using the [Keep a CHANGELOG](https://keepachangelog.com/) principles.
 
+## [4.0.0] - 2025-02-07
+
+### Removed
+
+* This component is no longer supported on PHP 8.2
+
 ## [3.0.1] - 2024-07-03
 
 ### Changed
@@ -59,6 +65,7 @@ All notable changes are documented in this file using the [Keep a CHANGELOG](htt
 
 * Initial release
 
+[4.0.0]: https://github.com/sebastianbergmann/lines-of-code/compare/3.0...4.0.0
 [3.0.1]: https://github.com/sebastianbergmann/lines-of-code/compare/3.0.0...3.0.1
 [3.0.0]: https://github.com/sebastianbergmann/lines-of-code/compare/2.0...3.0.0
 [2.0.2]: https://github.com/sebastianbergmann/lines-of-code/compare/2.0.1...2.0.2
diff --git a/LICENSE b/LICENSE
index edaedf61938c1808f162dc7951866db4b7a79e3d..0d534da34a86a5784ce65a7639d489a0bd530aab 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 BSD 3-Clause License
 
-Copyright (c) 2020-2024, Sebastian Bergmann
+Copyright (c) 2020-2025, Sebastian Bergmann
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
diff --git a/README.md b/README.md
index d98eab43fce28cde55f4164515a8ae9a64ec32bb..765a0ebb24e753f0a24a1c904418941d8dd393a4 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-[![Latest Stable Version](https://poser.pugx.org/sebastian/lines-of-code/v/stable.png)](https://packagist.org/packages/sebastian/lines-of-code)
+[![Latest Stable Version](https://poser.pugx.org/sebastian/lines-of-code/v)](https://packagist.org/packages/sebastian/lines-of-code)
 [![CI Status](https://github.com/sebastianbergmann/lines-of-code/workflows/CI/badge.svg)](https://github.com/sebastianbergmann/lines-of-code/actions)
 [![codecov](https://codecov.io/gh/sebastianbergmann/lines-of-code/branch/main/graph/badge.svg)](https://codecov.io/gh/sebastianbergmann/lines-of-code)
 
diff --git a/composer.json b/composer.json
index 46f1243a3de5832359449ccf182f04af0b93f791..7c428050f6c62efacff1bae95cb66070184b5994 100644
--- a/composer.json
+++ b/composer.json
@@ -17,15 +17,15 @@
     },
     "prefer-stable": true,
     "require": {
-        "php": ">=8.2",
+        "php": ">=8.3",
         "nikic/php-parser": "^5.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^11.0"
+        "phpunit/phpunit": "^12.0"
     },
     "config": {
         "platform": {
-            "php": "8.2"
+            "php": "8.3"
         },
         "optimize-autoloader": true,
         "sort-packages": true
@@ -37,7 +37,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-main": "3.0-dev"
+            "dev-main": "4.0-dev"
         }
     }
 }
diff --git a/phpstan.neon b/phpstan.neon
index ab7e25ec2893d1dc4d27de5aafe0724013bb3057..062a16174bfd253a9e5351340571fad7407cc230 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -1,16 +1,6 @@
 parameters:
-    level: 9
+    level: 10
     paths:
         - src
         - tests/unit
         - tests/integration
-    ignoreErrors:
-        -
-            message: "#^Return type \\(void\\) of method SebastianBergmann\\\\LinesOfCode\\\\LineCountingVisitor\\:\\:enterNode\\(\\) should be compatible with return type \\(array\\<PhpParser\\\\Node\\>\\|int\\|PhpParser\\\\Node\\|null\\) of method PhpParser\\\\NodeVisitor\\:\\:enterNode\\(\\)$#"
-            count: 1
-            path: src/LineCountingVisitor.php
-
-        -
-            message: "#^Return type \\(void\\) of method SebastianBergmann\\\\LinesOfCode\\\\LineCountingVisitor\\:\\:enterNode\\(\\) should be compatible with return type \\(array\\<PhpParser\\\\Node\\>\\|int\\|PhpParser\\\\Node\\|null\\) of method PhpParser\\\\NodeVisitorAbstract\\:\\:enterNode\\(\\)$#"
-            count: 1
-            path: src/LineCountingVisitor.php
diff --git a/phpunit.xml b/phpunit.xml
index b6d89b8859e41907714bc7bafa066dee92644ecc..da8ef745319bca9e90439e0f6616598d635d169a 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -1,12 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd"
-         bootstrap="vendor/autoload.php"
          cacheDirectory=".phpunit.cache"
          executionOrder="depends,defects"
          requireCoverageMetadata="true"
          beStrictAboutCoverageMetadata="true"
          beStrictAboutOutputDuringTests="true"
+         displayDetailsOnPhpunitDeprecations="true"
+         failOnPhpunitDeprecation="true"
          failOnRisky="true"
          failOnWarning="true"
          colors="true">
diff --git a/src/Counter.php b/src/Counter.php
index 2baed4ba374865676b9d38761c57a377d7473fc3..ed2d3ab0e4083c149a97401952c1255f8afeefa3 100644
--- a/src/Counter.php
+++ b/src/Counter.php
@@ -48,7 +48,6 @@ final class Counter
             assert($nodes !== null);
 
             return $this->countInAbstractSyntaxTree($linesOfCode, $nodes);
-
             // @codeCoverageIgnoreStart
         } catch (Error $error) {
             throw new RuntimeException(
diff --git a/src/Exception/NegativeValueException.php b/src/Exception/NegativeValueException.php
deleted file mode 100644
index 40d27e1f0f05ef4221fcc9c84e76689eb717c249..0000000000000000000000000000000000000000
--- a/src/Exception/NegativeValueException.php
+++ /dev/null
@@ -1,16 +0,0 @@
-<?php declare(strict_types=1);
-/*
- * This file is part of sebastian/lines-of-code.
- *
- * (c) Sebastian Bergmann <sebastian@phpunit.de>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-namespace SebastianBergmann\LinesOfCode;
-
-use InvalidArgumentException;
-
-final class NegativeValueException extends InvalidArgumentException implements Exception
-{
-}
diff --git a/src/LineCountingVisitor.php b/src/LineCountingVisitor.php
index fd36675cca8d9bed9db8e520bbf8a9a773e76682..a461a98a99928054f5095633469445063be07fdf 100644
--- a/src/LineCountingVisitor.php
+++ b/src/LineCountingVisitor.php
@@ -43,15 +43,17 @@ final class LineCountingVisitor extends NodeVisitorAbstract
         $this->linesOfCode = $linesOfCode;
     }
 
-    public function enterNode(Node $node): void
+    public function enterNode(Node $node): null
     {
         $this->comments = array_merge($this->comments, $node->getComments());
 
         if (!$node instanceof Expr) {
-            return;
+            return null;
         }
 
         $this->linesWithStatements[] = $node->getStartLine();
+
+        return null;
     }
 
     public function result(): LinesOfCode
diff --git a/src/LinesOfCode.php b/src/LinesOfCode.php
index 890d9611f0b7ae41cf10cc8377fe10cdd25b39c4..2aa5b0e64618044d0b36d7b9a8ca750e95004074 100644
--- a/src/LinesOfCode.php
+++ b/src/LinesOfCode.php
@@ -41,30 +41,9 @@ final readonly class LinesOfCode
      * @param non-negative-int $logicalLinesOfCode
      *
      * @throws IllogicalValuesException
-     * @throws NegativeValueException
      */
     public function __construct(int $linesOfCode, int $commentLinesOfCode, int $nonCommentLinesOfCode, int $logicalLinesOfCode)
     {
-        /** @phpstan-ignore smaller.alwaysFalse */
-        if ($linesOfCode < 0) {
-            throw new NegativeValueException('$linesOfCode must not be negative');
-        }
-
-        /** @phpstan-ignore smaller.alwaysFalse */
-        if ($commentLinesOfCode < 0) {
-            throw new NegativeValueException('$commentLinesOfCode must not be negative');
-        }
-
-        /** @phpstan-ignore smaller.alwaysFalse */
-        if ($nonCommentLinesOfCode < 0) {
-            throw new NegativeValueException('$nonCommentLinesOfCode must not be negative');
-        }
-
-        /** @phpstan-ignore smaller.alwaysFalse */
-        if ($logicalLinesOfCode < 0) {
-            throw new NegativeValueException('$logicalLinesOfCode must not be negative');
-        }
-
         if ($linesOfCode - $commentLinesOfCode !== $nonCommentLinesOfCode) {
             throw new IllogicalValuesException('$linesOfCode !== $commentLinesOfCode + $nonCommentLinesOfCode');
         }
diff --git a/tests/unit/LinesOfCodeTest.php b/tests/unit/LinesOfCodeTest.php
index a5a6c61a0836f42ca14c60ac656698fb6c9606d6..152a9f08c5eec2725aa4268266deb070bbd9fc5d 100644
--- a/tests/unit/LinesOfCodeTest.php
+++ b/tests/unit/LinesOfCodeTest.php
@@ -42,42 +42,6 @@ final class LinesOfCodeTest extends TestCase
         $this->assertSame(0, $this->linesOfCode()->logicalLinesOfCode());
     }
 
-    public function testLinesOfCodeCannotBeNegative(): void
-    {
-        $this->expectException(NegativeValueException::class);
-        $this->expectExceptionMessage('$linesOfCode must not be negative');
-
-        /** @phpstan-ignore argument.type */
-        new LinesOfCode(-1, 0, 0, 0);
-    }
-
-    public function testCommentLinesOfCodeCannotBeNegative(): void
-    {
-        $this->expectException(NegativeValueException::class);
-        $this->expectExceptionMessage('$commentLinesOfCode must not be negative');
-
-        /** @phpstan-ignore argument.type */
-        new LinesOfCode(0, -1, 0, 0);
-    }
-
-    public function testNonCommentLinesOfCodeCannotBeNegative(): void
-    {
-        $this->expectException(NegativeValueException::class);
-        $this->expectExceptionMessage('$nonCommentLinesOfCode must not be negative');
-
-        /** @phpstan-ignore argument.type */
-        new LinesOfCode(0, 0, -1, 0);
-    }
-
-    public function testLogicalLinesOfCodeCannotBeNegative(): void
-    {
-        $this->expectException(NegativeValueException::class);
-        $this->expectExceptionMessage('$logicalLinesOfCode must not be negative');
-
-        /** @phpstan-ignore argument.type */
-        new LinesOfCode(0, 0, 0, -1);
-    }
-
     #[TestDox('Lines of Code = Comment Lines of Code + Non-Comment Lines of Code')]
     public function testNumbersHaveToMakeSense(): void
     {