diff --git a/.github/workflows/phpstan.yml b/.github/workflows/phpstan.yml
index a4c25379a..501b14840 100644
--- a/.github/workflows/phpstan.yml
+++ b/.github/workflows/phpstan.yml
@@ -27,7 +27,7 @@ jobs:
         include:
           - php-version: "7.2"
             experimental: false
-          - php-version: "8.1"
+          - php-version: "8.3"
             experimental: true
       fail-fast: false
 
diff --git a/composer.json b/composer.json
index c1e52868d..6bdfa04ad 100644
--- a/composer.json
+++ b/composer.json
@@ -29,7 +29,7 @@
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         "seld/jsonlint": "^1.4",
         "seld/phar-utils": "^1.2",
diff --git a/composer.lock b/composer.lock
index a9c400dfa..3a0451251 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
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@@ -1104,16 +1099,16 @@
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         },
         {
             "name": "symfony/phpunit-bridge",
-            "version": "v7.1.1",
+            "version": "v7.1.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/phpunit-bridge.git",
-                "reference": "3e1cb8c4dee341cfe96ae9fe29b1acda52a6bb16"
+                "reference": "8eb63f1c0e2001f97b3cd9ed550b18765cdeb1c8"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/phpunit-bridge/zipball/3e1cb8c4dee341cfe96ae9fe29b1acda52a6bb16",
-                "reference": "3e1cb8c4dee341cfe96ae9fe29b1acda52a6bb16",
+                "url": "https://api.github.com/repos/symfony/phpunit-bridge/zipball/8eb63f1c0e2001f97b3cd9ed550b18765cdeb1c8",
+                "reference": "8eb63f1c0e2001f97b3cd9ed550b18765cdeb1c8",
                 "shasum": ""
             },
             "require": {
@@ -2357,7 +2352,7 @@
             "description": "Provides utilities for PHPUnit, especially user deprecation notices management",
             "homepage": "https://symfony.com",
             "support": {
-                "source": "https://github.com/symfony/phpunit-bridge/tree/v7.1.1"
+                "source": "https://github.com/symfony/phpunit-bridge/tree/v7.1.2"
             },
             "funding": [
                 {
@@ -2373,7 +2368,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2024-06-04T06:50:37+00:00"
+            "time": "2024-06-25T19:55:06+00:00"
         }
     ],
     "aliases": [],
diff --git a/phpstan/baseline-8.1.neon b/phpstan/baseline-8.3.neon
similarity index 95%
rename from phpstan/baseline-8.1.neon
rename to phpstan/baseline-8.3.neon
index 1a2a74b81..c6e16fee6 100644
--- a/phpstan/baseline-8.1.neon
+++ b/phpstan/baseline-8.3.neon
@@ -55,6 +55,16 @@ parameters:
 			count: 2
 			path: ../src/Composer/Console/Application.php
 
+		-
+			message: "#^Parameter \\#2 \\$mode of method Symfony\\\\Component\\\\Console\\\\Input\\\\InputArgument\\:\\:__construct\\(\\) expects int\\<0, 7\\>\\|null, int\\|null given\\.$#"
+			count: 1
+			path: ../src/Composer/Console/Input/InputArgument.php
+
+		-
+			message: "#^Parameter \\#3 \\$mode of method Symfony\\\\Component\\\\Console\\\\Input\\\\InputOption\\:\\:__construct\\(\\) expects int\\<0, 31\\>\\|null, int\\|null given\\.$#"
+			count: 1
+			path: ../src/Composer/Console/Input/InputOption.php
+
 		-
 			message: "#^Parameter \\#2 \\$callback of function uksort expects callable\\(string, string\\)\\: int, 'version_compare' given\\.$#"
 			count: 2
diff --git a/phpstan/baseline.neon b/phpstan/baseline.neon
index d3122d737..7d1258a34 100644
--- a/phpstan/baseline.neon
+++ b/phpstan/baseline.neon
@@ -497,7 +497,7 @@ parameters:
 
 		-
 			message: "#^Short ternary operator is not allowed\\. Use null coalesce operator if applicable or consider using long ternary\\.$#"
-			count: 7
+			count: 6
 			path: ../src/Composer/Command/InitCommand.php
 
 		-
@@ -1276,7 +1276,7 @@ parameters:
 			path: ../src/Composer/DependencyResolver/Rule.php
 
 		-
-			message: "#^Method Composer\\\\DependencyResolver\\\\Rule\\:\\:getReason\\(\\) should return 2\\|3\\|6\\|7\\|10\\|12\\|13\\|14 but returns int\\.$#"
+			message: "#^Method Composer\\\\DependencyResolver\\\\Rule\\:\\:getReason\\(\\) should return 2\\|3\\|6\\|7\\|10\\|12\\|13\\|14 but returns int\\<0, 255\\>\\.$#"
 			count: 1
 			path: ../src/Composer/DependencyResolver/Rule.php
 
@@ -1295,11 +1295,6 @@ parameters:
 			count: 1
 			path: ../src/Composer/DependencyResolver/Rule.php
 
-		-
-			message: "#^Only booleans are allowed in a negated boolean, int given\\.$#"
-			count: 1
-			path: ../src/Composer/DependencyResolver/Rule.php
-
 		-
 			message: "#^Only booleans are allowed in an if condition, Composer\\\\Repository\\\\LockArrayRepository\\|null given\\.$#"
 			count: 2
@@ -2485,6 +2480,16 @@ parameters:
 			count: 1
 			path: ../src/Composer/Package/BasePackage.php
 
+		-
+			message: "#^Method Composer\\\\Package\\\\BasePackage\\:\\:packageNameToRegexp\\(\\) should return non\\-empty\\-string but returns string\\.$#"
+			count: 1
+			path: ../src/Composer/Package/BasePackage.php
+
+		-
+			message: "#^Method Composer\\\\Package\\\\BasePackage\\:\\:packageNamesToRegexp\\(\\) should return non\\-empty\\-string but returns string\\.$#"
+			count: 1
+			path: ../src/Composer/Package/BasePackage.php
+
 		-
 			message: "#^Only booleans are allowed in &&, Composer\\\\Repository\\\\RepositoryInterface\\|null given on the left side\\.$#"
 			count: 1
@@ -4403,21 +4408,11 @@ parameters:
 			count: 1
 			path: ../src/Composer/Util/Perforce.php
 
-		-
-			message: "#^Cannot access offset 'dir' on array\\|false\\.$#"
-			count: 1
-			path: ../src/Composer/Util/Platform.php
-
 		-
 			message: "#^Casting to string something that's already string\\.$#"
 			count: 1
 			path: ../src/Composer/Util/Platform.php
 
-		-
-			message: "#^Only booleans are allowed in &&, array\\|false given on the left side\\.$#"
-			count: 1
-			path: ../src/Composer/Util/Platform.php
-
 		-
 			message: "#^Only booleans are allowed in &&, string\\|false given on the right side\\.$#"
 			count: 1
@@ -4578,11 +4573,6 @@ parameters:
 			count: 1
 			path: ../src/Composer/Util/RemoteFilesystem.php
 
-		-
-			message: "#^Parameter &\\$responseHeaders @param\\-out type of method Composer\\\\Util\\\\RemoteFilesystem\\:\\:getRemoteContents\\(\\) expects list\\<string\\>, array\\<int, string\\> given\\.$#"
-			count: 1
-			path: ../src/Composer/Util/RemoteFilesystem.php
-
 		-
 			message: "#^Property Composer\\\\Util\\\\RemoteFilesystem\\:\\:\\$scheme \\(string\\) does not accept string\\|false\\|null\\.$#"
 			count: 1
diff --git a/phpstan/config.neon b/phpstan/config.neon
index 6790168b9..8a3062ba8 100644
--- a/phpstan/config.neon
+++ b/phpstan/config.neon
@@ -5,6 +5,8 @@ includes:
     - ../vendor/phpstan/phpstan-strict-rules/rules.neon
     - ../vendor/phpstan/phpstan-symfony/extension.neon
     - ../vendor/phpstan/phpstan-symfony/rules.neon
+    # TODO when requiring php 7.4+ we can use this
+    #- ../vendor/staabm/phpstan-todo-by/extension.neon
     - ./rules.neon # Composer-specific PHPStan extensions, can be reused by third party packages by including 'vendor/composer/composer/phpstan/rules.neon' in your phpstan config
     - ./baseline.neon
     - ./ignore-by-php-version.neon.php
diff --git a/phpstan/ignore-by-php-version.neon.php b/phpstan/ignore-by-php-version.neon.php
index 21212110c..14a209ea3 100644
--- a/phpstan/ignore-by-php-version.neon.php
+++ b/phpstan/ignore-by-php-version.neon.php
@@ -3,7 +3,7 @@
 // more inspiration at https://github.com/phpstan/phpstan-src/blob/master/build/ignore-by-php-version.neon.php
 $includes = [];
 if (PHP_VERSION_ID >= 80000) {
-    $includes[] = __DIR__ . '/baseline-8.1.neon';
+    $includes[] = __DIR__ . '/baseline-8.3.neon';
 }
 
 $config['includes'] = $includes;
diff --git a/src/Composer/Command/SelfUpdateCommand.php b/src/Composer/Command/SelfUpdateCommand.php
index 1a8797a5b..bd006ea88 100644
--- a/src/Composer/Command/SelfUpdateCommand.php
+++ b/src/Composer/Command/SelfUpdateCommand.php
@@ -146,7 +146,7 @@ EOT
             $homeDirOwnerId = fileowner($home);
             if (is_array($composerUser) && $homeDirOwnerId !== false) {
                 $homeOwner = posix_getpwuid($homeDirOwnerId);
-                if (is_array($homeOwner) && isset($composerUser['name'], $homeOwner['name']) && $composerUser['name'] !== $homeOwner['name']) {
+                if (is_array($homeOwner) && $composerUser['name'] !== $homeOwner['name']) {
                     $io->writeError('<warning>You are running Composer as "'.$composerUser['name'].'", while "'.$home.'" is owned by "'.$homeOwner['name'].'"</warning>');
                 }
             }
diff --git a/src/Composer/Console/Input/InputArgument.php b/src/Composer/Console/Input/InputArgument.php
index a64724d6b..19aff8c33 100644
--- a/src/Composer/Console/Input/InputArgument.php
+++ b/src/Composer/Console/Input/InputArgument.php
@@ -26,7 +26,7 @@ use Symfony\Component\Console\Input\InputArgument as BaseInputArgument;
  *
  * @internal
  *
- * TODO drop when PHP 8.1 / symfony 6.1+ can be required
+ * TODO symfony/console:6.1 drop when PHP 8.1 / symfony 6.1+ can be required
  */
 class InputArgument extends BaseInputArgument
 {
diff --git a/src/Composer/Console/Input/InputOption.php b/src/Composer/Console/Input/InputOption.php
index c742daee7..b5ff333cd 100644
--- a/src/Composer/Console/Input/InputOption.php
+++ b/src/Composer/Console/Input/InputOption.php
@@ -26,7 +26,7 @@ use Symfony\Component\Console\Input\InputOption as BaseInputOption;
  *
  * @internal
  *
- * TODO drop when PHP 8.1 / symfony 6.1+ can be required
+ * TODO symfony/console:6.1 drop when PHP 8.1 / symfony 6.1+ can be required
  */
 class InputOption extends BaseInputOption
 {
diff --git a/src/Composer/DependencyResolver/Rule.php b/src/Composer/DependencyResolver/Rule.php
index 1b2f1aa95..d65164154 100644
--- a/src/Composer/DependencyResolver/Rule.php
+++ b/src/Composer/DependencyResolver/Rule.php
@@ -137,12 +137,12 @@ abstract class Rule
 
     public function isDisabled(): bool
     {
-        return (bool) (($this->bitfield & (255 << self::BITFIELD_DISABLED)) >> self::BITFIELD_DISABLED);
+        return 0 !== (($this->bitfield & (255 << self::BITFIELD_DISABLED)) >> self::BITFIELD_DISABLED);
     }
 
     public function isEnabled(): bool
     {
-        return !(($this->bitfield & (255 << self::BITFIELD_DISABLED)) >> self::BITFIELD_DISABLED);
+        return 0 === (($this->bitfield & (255 << self::BITFIELD_DISABLED)) >> self::BITFIELD_DISABLED);
     }
 
     abstract public function isAssertion(): bool;
diff --git a/src/Composer/Util/Platform.php b/src/Composer/Util/Platform.php
index 45060c85c..d7735ebc1 100644
--- a/src/Composer/Util/Platform.php
+++ b/src/Composer/Util/Platform.php
@@ -129,7 +129,9 @@ class Platform
         if (\function_exists('posix_getuid') && \function_exists('posix_getpwuid')) {
             $info = posix_getpwuid(posix_getuid());
 
-            return $info['dir'];
+            if (is_array($info)) {
+                return $info['dir'];
+            }
         }
 
         throw new \RuntimeException('Could not determine user directory');
@@ -252,7 +254,7 @@ class Platform
 
             if (function_exists('posix_getpwuid') && function_exists('posix_geteuid')) {
                 $processUser = posix_getpwuid(posix_geteuid());
-                if ($processUser && $processUser['name'] === 'vagrant') {
+                if (is_array($processUser) && $processUser['name'] === 'vagrant') {
                     return self::$isVirtualBoxGuest = true;
                 }
             }