diff --git a/src/FactorGraphs/ScheduleLoop.php b/src/FactorGraphs/ScheduleLoop.php
index 7087324..ea5cf86 100644
--- a/src/FactorGraphs/ScheduleLoop.php
+++ b/src/FactorGraphs/ScheduleLoop.php
@@ -10,6 +10,7 @@ class ScheduleLoop extends Schedule
     {
     }
 
+    #[\Override]
     public function visit(int $depth = -1, int $maxDepth = 0): float
     {
         $delta = $this->scheduleToLoop->visit($depth + 1, $maxDepth);
diff --git a/src/FactorGraphs/ScheduleSequence.php b/src/FactorGraphs/ScheduleSequence.php
index 98a33d1..8c0df14 100644
--- a/src/FactorGraphs/ScheduleSequence.php
+++ b/src/FactorGraphs/ScheduleSequence.php
@@ -13,6 +13,7 @@ class ScheduleSequence extends Schedule
     {
     }
 
+    #[\Override]
     public function visit(int $depth = -1, int $maxDepth = 0): float
     {
         $maxDelta = 0;
diff --git a/src/FactorGraphs/ScheduleStep.php b/src/FactorGraphs/ScheduleStep.php
index e4e31b9..7f18c1d 100644
--- a/src/FactorGraphs/ScheduleStep.php
+++ b/src/FactorGraphs/ScheduleStep.php
@@ -10,6 +10,7 @@ class ScheduleStep extends Schedule
     {
     }
 
+    #[\Override]
     public function visit(int $depth = -1, int $maxDepth = 0): float
     {
         return $this->factor->updateMessageIndex($this->index);
diff --git a/src/Player.php b/src/Player.php
index d0aa075..9816f69 100644
--- a/src/Player.php
+++ b/src/Player.php
@@ -47,6 +47,7 @@ class Player implements ISupportPartialPlay, ISupportPartialUpdate
     /**
      * Indicates the percent of the time the player should be weighted where 0.0 indicates the player didn't play and 1.0 indicates the player played 100% of the time.
      */
+    #[\Override]
     public function getPartialPlayPercentage(): float
     {
         return $this->PartialPlayPct;
@@ -55,6 +56,7 @@ class Player implements ISupportPartialPlay, ISupportPartialUpdate
     /**
      * Indicated how much of a skill update a player should receive where 0.0 represents no update and 1.0 represents 100% of the update.
      */
+    #[\Override]
     public function getPartialUpdatePercentage(): float
     {
         return $this->PartialUpdatePct;
diff --git a/src/TrueSkill/FactorGraphTrueSkillCalculator.php b/src/TrueSkill/FactorGraphTrueSkillCalculator.php
index 9fa4af9..779f833 100644
--- a/src/TrueSkill/FactorGraphTrueSkillCalculator.php
+++ b/src/TrueSkill/FactorGraphTrueSkillCalculator.php
@@ -32,6 +32,7 @@ class FactorGraphTrueSkillCalculator extends SkillCalculator
     /**
      * {@inheritdoc}
      */
+    #[\Override]
     public function calculateNewRatings(
         GameInfo $gameInfo,
         array $teams,
@@ -54,6 +55,7 @@ class FactorGraphTrueSkillCalculator extends SkillCalculator
     /**
      * {@inheritdoc}
      */
+    #[\Override]
     public function calculateMatchQuality(GameInfo $gameInfo, array $teams): float
     {
         // We need to create the A matrix which is the player team assigments.
diff --git a/src/TrueSkill/Factors/GaussianFactor.php b/src/TrueSkill/Factors/GaussianFactor.php
index dbd86e4..924703f 100644
--- a/src/TrueSkill/Factors/GaussianFactor.php
+++ b/src/TrueSkill/Factors/GaussianFactor.php
@@ -14,6 +14,7 @@ abstract class GaussianFactor extends Factor
     /**
      * Sends the factor-graph message with and returns the log-normalization constant.
      */
+    #[\Override]
     protected function sendMessageVariable(Message $message, Variable $variable): float|int
     {
         $marginal = $variable->getValue();
@@ -24,6 +25,7 @@ abstract class GaussianFactor extends Factor
         return $logZ;
     }
 
+    #[\Override]
     public function createVariableToMessageBinding(Variable $variable): Message
     {
         $newDistribution = GaussianDistribution::fromPrecisionMean(0, 0);
diff --git a/src/TrueSkill/Factors/GaussianGreaterThanFactor.php b/src/TrueSkill/Factors/GaussianGreaterThanFactor.php
index 85c2979..6ec1ca7 100644
--- a/src/TrueSkill/Factors/GaussianGreaterThanFactor.php
+++ b/src/TrueSkill/Factors/GaussianGreaterThanFactor.php
@@ -22,6 +22,7 @@ class GaussianGreaterThanFactor extends GaussianFactor
         $this->createVariableToMessageBinding($variable);
     }
 
+    #[\Override]
     public function getLogNormalization(): float
     {
         $vars = $this->getVariables();
@@ -42,6 +43,7 @@ class GaussianGreaterThanFactor extends GaussianFactor
         );
     }
 
+    #[\Override]
     protected function updateMessageVariable(Message $message, Variable $variable): float
     {
         $oldMarginal = clone $variable->getValue();
diff --git a/src/TrueSkill/Factors/GaussianLikelihoodFactor.php b/src/TrueSkill/Factors/GaussianLikelihoodFactor.php
index badf36b..eb08e54 100644
--- a/src/TrueSkill/Factors/GaussianLikelihoodFactor.php
+++ b/src/TrueSkill/Factors/GaussianLikelihoodFactor.php
@@ -28,6 +28,7 @@ class GaussianLikelihoodFactor extends GaussianFactor
         $this->createVariableToMessageBinding($variable2);
     }
 
+    #[\Override]
     public function getLogNormalization(): float
     {
         /**
@@ -73,6 +74,7 @@ class GaussianLikelihoodFactor extends GaussianFactor
         return GaussianDistribution::subtract($newMarginal, $marginal1);
     }
 
+    #[\Override]
     public function updateMessageIndex(int $messageIndex): float
     {
         $messages = $this->getMessages();
diff --git a/src/TrueSkill/Factors/GaussianPriorFactor.php b/src/TrueSkill/Factors/GaussianPriorFactor.php
index 0644ff1..d88ef54 100644
--- a/src/TrueSkill/Factors/GaussianPriorFactor.php
+++ b/src/TrueSkill/Factors/GaussianPriorFactor.php
@@ -29,6 +29,7 @@ class GaussianPriorFactor extends GaussianFactor
         $this->createVariableToMessageBindingWithMessage($variable, $newMessage);
     }
 
+    #[\Override]
     protected function updateMessageVariable(Message $message, Variable $variable): float
     {
         $oldMarginal = clone $variable->getValue();
diff --git a/src/TrueSkill/Factors/GaussianWeightedSumFactor.php b/src/TrueSkill/Factors/GaussianWeightedSumFactor.php
index 27ff3e9..4125ce4 100644
--- a/src/TrueSkill/Factors/GaussianWeightedSumFactor.php
+++ b/src/TrueSkill/Factors/GaussianWeightedSumFactor.php
@@ -127,6 +127,7 @@ class GaussianWeightedSumFactor extends GaussianFactor
         }
     }
 
+    #[\Override]
     public function getLogNormalization(): float
     {
         $vars = $this->getVariables();
@@ -197,6 +198,7 @@ class GaussianWeightedSumFactor extends GaussianFactor
         return $finalDiff;
     }
 
+    #[\Override]
     public function updateMessageIndex(int $messageIndex): float
     {
         $allMessages = $this->getMessages();
diff --git a/src/TrueSkill/Factors/GaussianWithinFactor.php b/src/TrueSkill/Factors/GaussianWithinFactor.php
index 3ce8316..7142965 100644
--- a/src/TrueSkill/Factors/GaussianWithinFactor.php
+++ b/src/TrueSkill/Factors/GaussianWithinFactor.php
@@ -23,6 +23,7 @@ class GaussianWithinFactor extends GaussianFactor
         $this->createVariableToMessageBinding($variable);
     }
 
+    #[\Override]
     public function getLogNormalization(): float
     {
         /**
@@ -46,6 +47,7 @@ class GaussianWithinFactor extends GaussianFactor
         return -GaussianDistribution::logProductNormalization($messageFromVariable, $message) + log($z);
     }
 
+    #[\Override]
     protected function updateMessageVariable(Message $message, Variable $variable): float
     {
         $oldMarginal = clone $variable->getValue();
diff --git a/src/TrueSkill/Layers/IteratedTeamDifferencesInnerLayer.php b/src/TrueSkill/Layers/IteratedTeamDifferencesInnerLayer.php
index fd3cdfa..36333f2 100644
--- a/src/TrueSkill/Layers/IteratedTeamDifferencesInnerLayer.php
+++ b/src/TrueSkill/Layers/IteratedTeamDifferencesInnerLayer.php
@@ -22,6 +22,7 @@ class IteratedTeamDifferencesInnerLayer extends TrueSkillFactorGraphLayer
         parent::__construct($parentGraph);
     }
 
+    #[\Override]
     public function getLocalFactors(): array
     {
         return array_merge(
@@ -30,6 +31,7 @@ class IteratedTeamDifferencesInnerLayer extends TrueSkillFactorGraphLayer
         );
     }
 
+    #[\Override]
     public function buildLayer(): void
     {
         $inputVariablesGroups = $this->getInputVariablesGroups();
@@ -41,6 +43,7 @@ class IteratedTeamDifferencesInnerLayer extends TrueSkillFactorGraphLayer
         $this->teamDifferencesComparisonLayer->buildLayer();
     }
 
+    #[\Override]
     public function createPriorSchedule(): ?ScheduleSequence
     {
         switch (count($this->getInputVariablesGroups())) {
diff --git a/src/TrueSkill/Layers/PlayerPerformancesToTeamPerformancesLayer.php b/src/TrueSkill/Layers/PlayerPerformancesToTeamPerformancesLayer.php
index 7ddfc7b..318ed24 100644
--- a/src/TrueSkill/Layers/PlayerPerformancesToTeamPerformancesLayer.php
+++ b/src/TrueSkill/Layers/PlayerPerformancesToTeamPerformancesLayer.php
@@ -13,6 +13,7 @@ use DNW\Skills\FactorGraphs\KeyedVariable;
 
 class PlayerPerformancesToTeamPerformancesLayer extends TrueSkillFactorGraphLayer
 {
+    #[\Override]
     public function buildLayer(): void
     {
         $inputVariablesGroups = $this->getInputVariablesGroups();
@@ -32,6 +33,7 @@ class PlayerPerformancesToTeamPerformancesLayer extends TrueSkillFactorGraphLaye
         }
     }
 
+    #[\Override]
     public function createPriorSchedule(): ?ScheduleSequence
     {
         $localFactors = $this->getLocalFactors();
@@ -66,6 +68,7 @@ class PlayerPerformancesToTeamPerformancesLayer extends TrueSkillFactorGraphLaye
         );
     }
 
+    #[\Override]
     public function createPosteriorSchedule(): ?ScheduleSequence
     {
         $allFactors = [];
diff --git a/src/TrueSkill/Layers/PlayerPriorValuesToSkillsLayer.php b/src/TrueSkill/Layers/PlayerPriorValuesToSkillsLayer.php
index 8dffc06..762dc92 100644
--- a/src/TrueSkill/Layers/PlayerPriorValuesToSkillsLayer.php
+++ b/src/TrueSkill/Layers/PlayerPriorValuesToSkillsLayer.php
@@ -27,6 +27,7 @@ class PlayerPriorValuesToSkillsLayer extends TrueSkillFactorGraphLayer
         parent::__construct($parentGraph);
     }
 
+    #[\Override]
     public function buildLayer(): void
     {
         $teams = $this->teams;
@@ -49,6 +50,7 @@ class PlayerPriorValuesToSkillsLayer extends TrueSkillFactorGraphLayer
         }
     }
 
+    #[\Override]
     public function createPriorSchedule(): ?ScheduleSequence
     {
         $localFactors = $this->getLocalFactors();
diff --git a/src/TrueSkill/Layers/PlayerSkillsToPerformancesLayer.php b/src/TrueSkill/Layers/PlayerSkillsToPerformancesLayer.php
index f60a81b..cf92a0f 100644
--- a/src/TrueSkill/Layers/PlayerSkillsToPerformancesLayer.php
+++ b/src/TrueSkill/Layers/PlayerSkillsToPerformancesLayer.php
@@ -13,6 +13,7 @@ use DNW\Skills\FactorGraphs\ScheduleSequence;
 
 class PlayerSkillsToPerformancesLayer extends TrueSkillFactorGraphLayer
 {
+    #[\Override]
     public function buildLayer(): void
     {
         $inputVarGroups = $this->getInputVariablesGroups();
@@ -51,6 +52,7 @@ class PlayerSkillsToPerformancesLayer extends TrueSkillFactorGraphLayer
         return $this->getParentFactorGraph()->getVariableFactory()->createKeyedVariable($key);
     }
 
+    #[\Override]
     public function createPriorSchedule(): ?ScheduleSequence
     {
         $localFactors = $this->getLocalFactors();
@@ -65,6 +67,7 @@ class PlayerSkillsToPerformancesLayer extends TrueSkillFactorGraphLayer
         );
     }
 
+    #[\Override]
     public function createPosteriorSchedule(): ?ScheduleSequence
     {
         $localFactors = $this->getLocalFactors();
diff --git a/src/TrueSkill/Layers/TeamDifferencesComparisonLayer.php b/src/TrueSkill/Layers/TeamDifferencesComparisonLayer.php
index 53fa675..163cf1a 100644
--- a/src/TrueSkill/Layers/TeamDifferencesComparisonLayer.php
+++ b/src/TrueSkill/Layers/TeamDifferencesComparisonLayer.php
@@ -23,6 +23,7 @@ class TeamDifferencesComparisonLayer extends TrueSkillFactorGraphLayer
         $this->epsilon = DrawMargin::getDrawMarginFromDrawProbability($gameInfo->getDrawProbability(), $gameInfo->getBeta());
     }
 
+    #[\Override]
     public function buildLayer(): void
     {
         $inputVarGroups = $this->getInputVariablesGroups();
diff --git a/src/TrueSkill/Layers/TeamPerformancesToTeamPerformanceDifferencesLayer.php b/src/TrueSkill/Layers/TeamPerformancesToTeamPerformanceDifferencesLayer.php
index 5199d20..ba47505 100644
--- a/src/TrueSkill/Layers/TeamPerformancesToTeamPerformanceDifferencesLayer.php
+++ b/src/TrueSkill/Layers/TeamPerformancesToTeamPerformanceDifferencesLayer.php
@@ -9,6 +9,7 @@ use DNW\Skills\TrueSkill\Factors\GaussianWeightedSumFactor;
 
 class TeamPerformancesToTeamPerformanceDifferencesLayer extends TrueSkillFactorGraphLayer
 {
+    #[\Override]
     public function buildLayer(): void
     {
         $inputVariablesGroups = $this->getInputVariablesGroups();
diff --git a/src/TrueSkill/TwoPlayerTrueSkillCalculator.php b/src/TrueSkill/TwoPlayerTrueSkillCalculator.php
index 30414b7..f4e7819 100644
--- a/src/TrueSkill/TwoPlayerTrueSkillCalculator.php
+++ b/src/TrueSkill/TwoPlayerTrueSkillCalculator.php
@@ -31,6 +31,7 @@ class TwoPlayerTrueSkillCalculator extends SkillCalculator
     /**
      * {@inheritdoc}
      */
+    #[\Override]
     public function calculateNewRatings(
         GameInfo $gameInfo,
         array $teams,
@@ -138,6 +139,7 @@ class TwoPlayerTrueSkillCalculator extends SkillCalculator
     /**
      * {@inheritdoc}
      */
+    #[\Override]
     public function calculateMatchQuality(GameInfo $gameInfo, array $teams): float
     {
         $this->validateTeamCountAndPlayersCountPerTeam($teams);
diff --git a/src/TrueSkill/TwoTeamTrueSkillCalculator.php b/src/TrueSkill/TwoTeamTrueSkillCalculator.php
index 8bdc1b5..6c5d89c 100644
--- a/src/TrueSkill/TwoTeamTrueSkillCalculator.php
+++ b/src/TrueSkill/TwoTeamTrueSkillCalculator.php
@@ -31,6 +31,7 @@ class TwoTeamTrueSkillCalculator extends SkillCalculator
     /**
      * {@inheritdoc}
      */
+    #[\Override]
     public function calculateNewRatings(GameInfo $gameInfo, array $teams, array $teamRanks): RatingContainer
     {
         $this->validateTeamCountAndPlayersCountPerTeam($teams);
@@ -146,6 +147,7 @@ class TwoTeamTrueSkillCalculator extends SkillCalculator
     /**
      * {@inheritdoc}
      */
+    #[\Override]
     public function calculateMatchQuality(GameInfo $gameInfo, array $teams): float
     {
         $this->validateTeamCountAndPlayersCountPerTeam($teams);