diff --git a/composer.json b/composer.json
index 0ef9f75..8b65249 100644
--- a/composer.json
+++ b/composer.json
@@ -1,9 +1,9 @@
 {
   "name": "dnw/php-trueskill",
-  "description": "Trueskill implementation by Moserware updated for PHP 8.1",
+  "description": "Trueskill implementation by Moserware updated for PHP 8.2",
   "keywords": ["trueskill", "matchmaking", "ranking", "skill", "elo"],
   "require": {
-    "php": "^8.1"
+    "php": "^8.2"
   },
   "require-dev": {
     "phpunit/phpunit": "^10",
diff --git a/psalm.xml b/psalm.xml
index 75966d3..b58b8b3 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -6,7 +6,7 @@
     xmlns="https://getpsalm.org/schema/config"
     xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
     findUnusedBaselineEntry="true"
-    findUnusedCode="true"
+    findUnusedCode="false"
 >
     <projectFiles>
         <directory name="src" />
diff --git a/src/SkillCalculator.php b/src/SkillCalculator.php
index e9a423d..b8df1d5 100644
--- a/src/SkillCalculator.php
+++ b/src/SkillCalculator.php
@@ -19,25 +19,25 @@ abstract class SkillCalculator
     /**
      * Calculates new ratings based on the prior ratings and team ranks.
      *
-     * @param  GameInfo $gameInfo               Parameters for the game.
-     * @param  Team[]   $teamsOfPlayerToRatings A mapping of team players and their ratings.
-     * @param  int[]    $teamRanks              The ranks of the teams where 1 is first place. For a tie, repeat the number (e.g. 1, 2, 2).
+     * @param  GameInfo $gameInfo  Parameters for the game.
+     * @param  Team[]   $teams     A mapping of team players and their ratings.
+     * @param  int[]    $teamRanks The ranks of the teams where 1 is first place. For a tie, repeat the number (e.g. 1, 2, 2).
      * @return RatingContainer All the players and their new ratings.
      */
     abstract public function calculateNewRatings(
         GameInfo $gameInfo,
-        array $teamsOfPlayerToRatings,
+        array $teams,
         array $teamRanks
     ): RatingContainer;
 
     /**
      * Calculates the match quality as the likelihood of all teams drawing.
      *
-     * @param  GameInfo $gameInfo               Parameters for the game.
-     * @param  Team[]    $teamsOfPlayerToRatings A mapping of team players and their ratings.
+     * @param  GameInfo $gameInfo Parameters for the game.
+     * @param  Team[]   $teams    A mapping of team players and their ratings.
      * @return float The quality of the match between the teams as a percentage (0% = bad, 100% = well matched).
      */
-    abstract public function calculateMatchQuality(GameInfo $gameInfo, array $teamsOfPlayerToRatings): float;
+    abstract public function calculateMatchQuality(GameInfo $gameInfo, array $teams): float;
 
     public function isSupported(int $option): bool
     {
diff --git a/src/TrueSkill/TwoTeamTrueSkillCalculator.php b/src/TrueSkill/TwoTeamTrueSkillCalculator.php
index 58f0867..3c01951 100644
--- a/src/TrueSkill/TwoTeamTrueSkillCalculator.php
+++ b/src/TrueSkill/TwoTeamTrueSkillCalculator.php
@@ -84,7 +84,7 @@ class TwoTeamTrueSkillCalculator extends SkillCalculator
         $selfMeanSum = BasicMath::sum($selfTeam->getAllRatings(), $meanGetter);
         $otherTeamMeanSum = BasicMath::sum($otherTeam->getAllRatings(), $meanGetter);
 
-        $varianceGetter = fn ($currentRating) => BasicMath::square($currentRating->getStandardDeviation());
+        $varianceGetter = fn ($currentRating): float => BasicMath::square($currentRating->getStandardDeviation());
 
         $c = sqrt(
             BasicMath::sum($selfTeam->getAllRatings(), $varianceGetter)
@@ -162,7 +162,7 @@ class TwoTeamTrueSkillCalculator extends SkillCalculator
 
         $meanGetter = fn ($currentRating) => $currentRating->getMean();
 
-        $varianceGetter = fn ($currentRating) => BasicMath::square($currentRating->getStandardDeviation());
+        $varianceGetter = fn ($currentRating): float => BasicMath::square($currentRating->getStandardDeviation());
 
         $team1MeanSum = BasicMath::sum($team1Ratings, $meanGetter);
         $team1StdDevSquared = BasicMath::sum($team1Ratings, $varianceGetter);