diff --git a/composer.json b/composer.json
index 715f398..93c20e8 100644
--- a/composer.json
+++ b/composer.json
@@ -1,9 +1,9 @@
 {
   "name": "dnw/php-trueskill",
-  "description": "Trueskill implementation by Moserware updated for PHP 8.2",
+  "description": "Trueskill implementation by Moserware updated for PHP 8.4",
   "keywords": ["trueskill", "matchmaking", "ranking", "skill", "elo"],
   "require": {
-    "php": "^8.2"
+    "php": "^8.4"
   },
   "require-dev": {
     "phpstan/phpstan": "^1.0",
@@ -51,7 +51,6 @@
       "@test",
       "@lint",
       "@analyze",
-      "@document",
       "@metrics",
       "@html"
     ]
diff --git a/composer.lock b/composer.lock
index 19dc719..8ff776d 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,21 +4,21 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "9bcad23ed6b67a87b77c11db92614e65",
+    "content-hash": "b812db257eb7996abdfd76cc1a74431f",
     "packages": [],
     "packages-dev": [
         {
             "name": "amphp/amp",
-            "version": "v3.0.2",
+            "version": "v3.1.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/amphp/amp.git",
-                "reference": "138801fb68cfc9c329da8a7b39d01ce7291ee4b0"
+                "reference": "7cf7fef3d667bfe4b2560bc87e67d5387a7bcde9"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/amphp/amp/zipball/138801fb68cfc9c329da8a7b39d01ce7291ee4b0",
-                "reference": "138801fb68cfc9c329da8a7b39d01ce7291ee4b0",
+                "url": "https://api.github.com/repos/amphp/amp/zipball/7cf7fef3d667bfe4b2560bc87e67d5387a7bcde9",
+                "reference": "7cf7fef3d667bfe4b2560bc87e67d5387a7bcde9",
                 "shasum": ""
             },
             "require": {
@@ -78,7 +78,7 @@
             ],
             "support": {
                 "issues": "https://github.com/amphp/amp/issues",
-                "source": "https://github.com/amphp/amp/tree/v3.0.2"
+                "source": "https://github.com/amphp/amp/tree/v3.1.0"
             },
             "funding": [
                 {
@@ -86,7 +86,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2024-05-10T21:37:46+00:00"
+            "time": "2025-01-26T16:07:39+00:00"
         },
         {
             "name": "amphp/byte-stream",
@@ -227,16 +227,16 @@
         },
         {
             "name": "amphp/pipeline",
-            "version": "v1.2.1",
+            "version": "v1.2.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/amphp/pipeline.git",
-                "reference": "66c095673aa5b6e689e63b52d19e577459129ab3"
+                "reference": "97cbf289f4d8877acfe58dd90ed5a4370a43caa4"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/amphp/pipeline/zipball/66c095673aa5b6e689e63b52d19e577459129ab3",
-                "reference": "66c095673aa5b6e689e63b52d19e577459129ab3",
+                "url": "https://api.github.com/repos/amphp/pipeline/zipball/97cbf289f4d8877acfe58dd90ed5a4370a43caa4",
+                "reference": "97cbf289f4d8877acfe58dd90ed5a4370a43caa4",
                 "shasum": ""
             },
             "require": {
@@ -282,7 +282,7 @@
             ],
             "support": {
                 "issues": "https://github.com/amphp/pipeline/issues",
-                "source": "https://github.com/amphp/pipeline/tree/v1.2.1"
+                "source": "https://github.com/amphp/pipeline/tree/v1.2.2"
             },
             "funding": [
                 {
@@ -290,7 +290,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2024-07-04T00:56:47+00:00"
+            "time": "2025-01-19T15:42:46+00:00"
         },
         {
             "name": "amphp/serialization",
@@ -1641,16 +1641,16 @@
         },
         {
             "name": "phpstan/phpstan",
-            "version": "1.12.15",
+            "version": "1.12.16",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpstan/phpstan.git",
-                "reference": "c91d4e8bc056f46cf653656e6f71004b254574d1"
+                "reference": "e0bb5cb78545aae631220735aa706eac633a6be9"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/c91d4e8bc056f46cf653656e6f71004b254574d1",
-                "reference": "c91d4e8bc056f46cf653656e6f71004b254574d1",
+                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/e0bb5cb78545aae631220735aa706eac633a6be9",
+                "reference": "e0bb5cb78545aae631220735aa706eac633a6be9",
                 "shasum": ""
             },
             "require": {
@@ -1695,7 +1695,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2025-01-05T16:40:22+00:00"
+            "time": "2025-01-21T14:50:05+00:00"
         },
         {
             "name": "phpunit/php-code-coverage",
@@ -2022,16 +2022,16 @@
         },
         {
             "name": "phpunit/phpunit",
-            "version": "11.5.2",
+            "version": "11.5.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "153d0531b9f7e883c5053160cad6dd5ac28140b3"
+                "reference": "30e319e578a7b5da3543073e30002bf82042f701"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/153d0531b9f7e883c5053160cad6dd5ac28140b3",
-                "reference": "153d0531b9f7e883c5053160cad6dd5ac28140b3",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/30e319e578a7b5da3543073e30002bf82042f701",
+                "reference": "30e319e578a7b5da3543073e30002bf82042f701",
                 "shasum": ""
             },
             "require": {
@@ -2052,7 +2052,7 @@
                 "phpunit/php-timer": "^7.0.1",
                 "sebastian/cli-parser": "^3.0.2",
                 "sebastian/code-unit": "^3.0.2",
-                "sebastian/comparator": "^6.2.1",
+                "sebastian/comparator": "^6.3.0",
                 "sebastian/diff": "^6.0.2",
                 "sebastian/environment": "^7.2.0",
                 "sebastian/exporter": "^6.3.0",
@@ -2103,7 +2103,7 @@
             "support": {
                 "issues": "https://github.com/sebastianbergmann/phpunit/issues",
                 "security": "https://github.com/sebastianbergmann/phpunit/security/policy",
-                "source": "https://github.com/sebastianbergmann/phpunit/tree/11.5.2"
+                "source": "https://github.com/sebastianbergmann/phpunit/tree/11.5.3"
             },
             "funding": [
                 {
@@ -2119,7 +2119,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2024-12-21T05:51:08+00:00"
+            "time": "2025-01-13T09:36:00+00:00"
         },
         {
             "name": "psalm/plugin-phpunit",
@@ -4231,12 +4231,12 @@
             "source": {
                 "type": "git",
                 "url": "https://github.com/vimeo/psalm.git",
-                "reference": "765dcbfe43002e52e4808b65561842784fe7bcc7"
+                "reference": "a17fdd709d1322edc47e8fa53c18b1d94ce8bdd8"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/vimeo/psalm/zipball/765dcbfe43002e52e4808b65561842784fe7bcc7",
-                "reference": "765dcbfe43002e52e4808b65561842784fe7bcc7",
+                "url": "https://api.github.com/repos/vimeo/psalm/zipball/a17fdd709d1322edc47e8fa53c18b1d94ce8bdd8",
+                "reference": "a17fdd709d1322edc47e8fa53c18b1d94ce8bdd8",
                 "shasum": ""
             },
             "require": {
@@ -4254,15 +4254,15 @@
                 "ext-simplexml": "*",
                 "ext-tokenizer": "*",
                 "felixfbecker/advanced-json-rpc": "^3.1",
-                "felixfbecker/language-server-protocol": "^1.5.2",
+                "felixfbecker/language-server-protocol": "^1.5.3",
                 "fidry/cpu-core-counter": "^0.4.1 || ^0.5.1 || ^1.0.0",
                 "netresearch/jsonmapper": "^1.0 || ^2.0 || ^3.0 || ^4.0",
                 "nikic/php-parser": "^5.0.0",
                 "php": "~8.1.17 || ~8.2.4 || ~8.3.0 || ~8.4.0",
                 "sebastian/diff": "^4.0 || ^5.0 || ^6.0",
                 "spatie/array-to-xml": "^2.17.0 || ^3.0",
-                "symfony/console": "^4.1.6 || ^5.0 || ^6.0 || ^7.0",
-                "symfony/filesystem": "^5.4 || ^6.0 || ^7.0"
+                "symfony/console": "^6.0 || ^7.0",
+                "symfony/filesystem": "^6.0 || ^7.0"
             },
             "provide": {
                 "psalm/psalm": "self.version"
@@ -4279,10 +4279,10 @@
                 "phpstan/phpdoc-parser": "^1.6",
                 "phpunit/phpunit": "^9.6",
                 "psalm/plugin-mockery": "^1.1",
-                "psalm/plugin-phpunit": "^0.18",
+                "psalm/plugin-phpunit": "^0.19",
                 "slevomat/coding-standard": "^8.4",
                 "squizlabs/php_codesniffer": "^3.6",
-                "symfony/process": "^4.4 || ^5.0 || ^6.0 || ^7.0"
+                "symfony/process": "^6.0 || ^7.0"
             },
             "suggest": {
                 "ext-curl": "In order to send data to shepherd",
@@ -4303,7 +4303,8 @@
                     "dev-3.x": "3.x-dev",
                     "dev-4.x": "4.x-dev",
                     "dev-5.x": "5.x-dev",
-                    "dev-master": "6.x-dev"
+                    "dev-6.x": "6.x-dev",
+                    "dev-master": "7.x-dev"
                 }
             },
             "autoload": {
@@ -4332,7 +4333,7 @@
                 "issues": "https://github.com/vimeo/psalm/issues",
                 "source": "https://github.com/vimeo/psalm"
             },
-            "time": "2024-12-15T08:19:36+00:00"
+            "time": "2025-01-27T10:58:44+00:00"
         },
         {
             "name": "webmozart/assert",
@@ -4402,7 +4403,7 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": "^8.2"
+        "php": "^8.4"
     },
     "platform-dev": {},
     "plugin-api-version": "2.6.0"
diff --git a/src/GameInfo.php b/src/GameInfo.php
index 3b56b4c..4afcc94 100644
--- a/src/GameInfo.php
+++ b/src/GameInfo.php
@@ -12,18 +12,18 @@ class GameInfo
     /**
      * Default initial mean / 6
      */
-    private const DEFAULT_BETA = 4.1666666666666666666666666666667;
+    private const float DEFAULT_BETA = 4.1666666666666666666666666666667;
 
-    private const DEFAULT_DRAW_PROBABILITY = 0.10;
+    private const float DEFAULT_DRAW_PROBABILITY = 0.10;
 
     /**
      * Default initial mean / 300
      */
-    private const DEFAULT_DYNAMICS_FACTOR = 0.083333333333333333333333333333333;
+    private const float DEFAULT_DYNAMICS_FACTOR = 0.083333333333333333333333333333333;
 
-    private const DEFAULT_INITIAL_MEAN = 25.0;
+    private const float DEFAULT_INITIAL_MEAN = 25.0;
 
-    private const DEFAULT_INITIAL_STANDARD_DEVIATION = 8.3333333333333333333333333333333;
+    private const float DEFAULT_INITIAL_STANDARD_DEVIATION = 8.3333333333333333333333333333333;
 
     public function __construct(
         private readonly float $initialMean = self::DEFAULT_INITIAL_MEAN,
diff --git a/src/Numerics/GaussianDistribution.php b/src/Numerics/GaussianDistribution.php
index 940d5c1..cff1d5f 100644
--- a/src/Numerics/GaussianDistribution.php
+++ b/src/Numerics/GaussianDistribution.php
@@ -12,9 +12,9 @@ namespace DNW\Skills\Numerics;
  */
 class GaussianDistribution
 {
-    private const DEFAULT_STANDARD_DEVIATION = 1.0;
+    private const float DEFAULT_STANDARD_DEVIATION = 1.0;
 
-    private const DEFAULT_MEAN = 0.0;
+    private const float DEFAULT_MEAN = 0.0;
 
     /**
      * Square Root 2π.
@@ -23,7 +23,7 @@ class GaussianDistribution
      *
      * @link https://www.wolframalpha.com/input?i=sqrt%282*pi%29 Source of value
      */
-    private const M_SQRT_2_PI = 2.5066282746310005024157652848110452530069867406099383166299235763;
+    private const float M_SQRT_2_PI = 2.5066282746310005024157652848110452530069867406099383166299235763;
 
     /**
      * Log of Square Root 2π.
@@ -32,7 +32,7 @@ class GaussianDistribution
      *
      * @link https://www.wolframalpha.com/input?i=log%28sqrt%282*pi%29%29 Source of value
      */
-    private const M_LOG_SQRT_2_PI = 0.9189385332046727417803297364056176398613974736377834128171515404;
+    private const float M_LOG_SQRT_2_PI = 0.9189385332046727417803297364056176398613974736377834128171515404;
 
     // precision and precisionMean are used because they make multiplying and dividing simpler
     // (see the accompanying math paper for more details)
diff --git a/src/Player.php b/src/Player.php
index 780c47e..d0aa075 100644
--- a/src/Player.php
+++ b/src/Player.php
@@ -9,9 +9,9 @@ namespace DNW\Skills;
  */
 class Player implements ISupportPartialPlay, ISupportPartialUpdate
 {
-    private const DEFAULT_PARTIAL_PLAY_PERCENTAGE = 1.0; // = 100% play time
+    private const float DEFAULT_PARTIAL_PLAY_PERCENTAGE = 1.0; // = 100% play time
 
-    private const DEFAULT_PARTIAL_UPDATE_PERCENTAGE = 1.0;
+    private const float DEFAULT_PARTIAL_UPDATE_PERCENTAGE = 1.0;
 
     private readonly float $PartialPlayPct;
 
diff --git a/src/Rating.php b/src/Rating.php
index b411b4f..e1fe7bc 100644
--- a/src/Rating.php
+++ b/src/Rating.php
@@ -11,7 +11,7 @@ use DNW\Skills\Numerics\GaussianDistribution;
  */
 class Rating
 {
-    private const CONSERVATIVE_STANDARD_DEVIATION_MULTIPLIER = 3;
+    private const float CONSERVATIVE_STANDARD_DEVIATION_MULTIPLIER = 3;
 
     /**
      * Constructs a rating.
diff --git a/src/Team.php b/src/Team.php
index 9d7a602..b49f0fe 100644
--- a/src/Team.php
+++ b/src/Team.php
@@ -6,7 +6,7 @@ namespace DNW\Skills;
 
 class Team extends RatingContainer
 {
-    public function __construct(Player $player = NULL, Rating $rating = NULL)
+    public function __construct(?Player $player = NULL, ?Rating $rating = NULL)
     {
         parent::__construct();
         if (! $player instanceof Player) {
diff --git a/tests/Numerics/GaussianDistributionTest.php b/tests/Numerics/GaussianDistributionTest.php
index 5f08980..d2660e9 100644
--- a/tests/Numerics/GaussianDistributionTest.php
+++ b/tests/Numerics/GaussianDistributionTest.php
@@ -14,7 +14,7 @@ use PHPUnit\Framework\Attributes\UsesClass;
 #[UsesClass(BasicMath::class)]
 class GaussianDistributionTest extends TestCase
 {
-    private const ERROR_TOLERANCE = 0.000001;
+    private const float ERROR_TOLERANCE = 0.000001;
 
     public function testGetters(): void
     {
diff --git a/tests/TrueSkill/DrawMarginTest.php b/tests/TrueSkill/DrawMarginTest.php
index eb807d3..228f7c7 100644
--- a/tests/TrueSkill/DrawMarginTest.php
+++ b/tests/TrueSkill/DrawMarginTest.php
@@ -16,7 +16,7 @@ use PHPUnit\Framework\Attributes\UsesClass;
 #[UsesClass(GaussianDistribution::class)]
 class DrawMarginTest extends TestCase
 {
-    private const ERROR_TOLERANCE = 0.000001;
+    private const float ERROR_TOLERANCE = 0.000001;
 
     public function testGetDrawMarginFromDrawProbability(): void
     {
diff --git a/tests/TrueSkill/TrueSkillCalculatorTests.php b/tests/TrueSkill/TrueSkillCalculatorTests.php
index 430575d..a8c00a3 100644
--- a/tests/TrueSkill/TrueSkillCalculatorTests.php
+++ b/tests/TrueSkill/TrueSkillCalculatorTests.php
@@ -13,9 +13,9 @@ use PHPUnit\Framework\TestCase;
 
 class TrueSkillCalculatorTests
 {
-    private const ERROR_TOLERANCE_TRUESKILL = 0.085;
+    private const float ERROR_TOLERANCE_TRUESKILL = 0.085;
 
-    private const ERROR_TOLERANCE_MATCH_QUALITY = 0.0005;
+    private const float ERROR_TOLERANCE_MATCH_QUALITY = 0.0005;
 
     // These are the roll-up ones