diff --git a/src/Entity/Answer.php b/src/Entity/Answer.php
index e45027c..e4fd21e 100644
--- a/src/Entity/Answer.php
+++ b/src/Entity/Answer.php
@@ -13,7 +13,7 @@ use Symfony\Component\Uid\Uuid;
 use Tvdt\Repository\AnswerRepository;
 
 #[ORM\Entity(repositoryClass: AnswerRepository::class)]
-class Answer
+final class Answer
 {
     #[ORM\Column(type: UuidType::NAME)]
     #[ORM\CustomIdGenerator(class: 'doctrine.uuid_generator')]
diff --git a/src/Entity/Candidate.php b/src/Entity/Candidate.php
index 5a2e16f..ee30ffb 100644
--- a/src/Entity/Candidate.php
+++ b/src/Entity/Candidate.php
@@ -14,7 +14,7 @@ use Tvdt\Repository\CandidateRepository;
 
 #[ORM\Entity(repositoryClass: CandidateRepository::class)]
 #[ORM\UniqueConstraint(fields: ['name', 'season'])]
-class Candidate
+final class Candidate
 {
     #[ORM\Column(type: UuidType::NAME, unique: true)]
     #[ORM\CustomIdGenerator(class: 'doctrine.uuid_generator')]
diff --git a/src/Entity/Elimination.php b/src/Entity/Elimination.php
index 8875a3a..d59da07 100644
--- a/src/Entity/Elimination.php
+++ b/src/Entity/Elimination.php
@@ -14,7 +14,7 @@ use Tvdt\Repository\EliminationRepository;
 
 #[ORM\Entity(repositoryClass: EliminationRepository::class)]
 #[ORM\HasLifecycleCallbacks]
-class Elimination
+final class Elimination
 {
     public const string SCREEN_GREEN = 'green';
 
diff --git a/src/Entity/GivenAnswer.php b/src/Entity/GivenAnswer.php
index 549f1fb..b09090c 100644
--- a/src/Entity/GivenAnswer.php
+++ b/src/Entity/GivenAnswer.php
@@ -13,7 +13,7 @@ use Tvdt\Repository\GivenAnswerRepository;
 
 #[ORM\Entity(repositoryClass: GivenAnswerRepository::class)]
 #[ORM\HasLifecycleCallbacks]
-class GivenAnswer
+final class GivenAnswer
 {
     #[ORM\Column(type: UuidType::NAME, unique: true)]
     #[ORM\CustomIdGenerator(class: 'doctrine.uuid_generator')]
diff --git a/src/Entity/Question.php b/src/Entity/Question.php
index 62b5ef2..2a1ef7d 100644
--- a/src/Entity/Question.php
+++ b/src/Entity/Question.php
@@ -13,7 +13,7 @@ use Symfony\Component\Uid\Uuid;
 use Tvdt\Repository\QuestionRepository;
 
 #[ORM\Entity(repositoryClass: QuestionRepository::class)]
-class Question
+final class Question
 {
     #[ORM\Column(type: UuidType::NAME)]
     #[ORM\CustomIdGenerator(class: 'doctrine.uuid_generator')]
diff --git a/src/Entity/Quiz.php b/src/Entity/Quiz.php
index 0d369d0..f4a2f02 100644
--- a/src/Entity/Quiz.php
+++ b/src/Entity/Quiz.php
@@ -13,7 +13,7 @@ use Tvdt\Repository\QuizRepository;
 
 #[ORM\Entity(repositoryClass: QuizRepository::class)]
 #[ORM\UniqueConstraint(fields: ['name', 'season'])]
-class Quiz
+final class Quiz
 {
     #[ORM\Column(type: UuidType::NAME)]
     #[ORM\CustomIdGenerator(class: 'doctrine.uuid_generator')]
diff --git a/src/Entity/QuizCandidate.php b/src/Entity/QuizCandidate.php
index ca104bb..a3e2683 100644
--- a/src/Entity/QuizCandidate.php
+++ b/src/Entity/QuizCandidate.php
@@ -14,7 +14,7 @@ use Tvdt\Repository\QuizCandidateRepository;
 #[ORM\Entity(repositoryClass: QuizCandidateRepository::class)]
 #[ORM\HasLifecycleCallbacks]
 #[ORM\UniqueConstraint(columns: ['candidate_id', 'quiz_id'])]
-class QuizCandidate
+final class QuizCandidate
 {
     #[ORM\Column(type: UuidType::NAME, unique: true)]
     #[ORM\CustomIdGenerator(class: 'doctrine.uuid_generator')]
diff --git a/src/Entity/Season.php b/src/Entity/Season.php
index f7ac04a..d390dca 100644
--- a/src/Entity/Season.php
+++ b/src/Entity/Season.php
@@ -12,7 +12,7 @@ use Symfony\Component\Uid\Uuid;
 use Tvdt\Repository\SeasonRepository;
 
 #[ORM\Entity(repositoryClass: SeasonRepository::class)]
-class Season
+final class Season
 {
     private const string SEASON_CODE_CHARACTERS = 'bcdfghjklmnpqrstvwxz';
 
diff --git a/src/Entity/SeasonSettings.php b/src/Entity/SeasonSettings.php
index 417a761..5c2d976 100644
--- a/src/Entity/SeasonSettings.php
+++ b/src/Entity/SeasonSettings.php
@@ -11,7 +11,7 @@ use Symfony\Component\Uid\Uuid;
 use Tvdt\Repository\SeasonSettingsRepository;
 
 #[ORM\Entity(repositoryClass: SeasonSettingsRepository::class)]
-class SeasonSettings
+final class SeasonSettings
 {
     #[ORM\Column(type: UuidType::NAME)]
     #[ORM\CustomIdGenerator(class: 'doctrine.uuid_generator')]
diff --git a/src/Entity/User.php b/src/Entity/User.php
index 7495f41..3b47b11 100644
--- a/src/Entity/User.php
+++ b/src/Entity/User.php
@@ -19,7 +19,7 @@ use Tvdt\Repository\UserRepository;
 #[ORM\Table(name: '`user`')]
 #[ORM\UniqueConstraint(name: 'UNIQ_IDENTIFIER_EMAIL', fields: ['email'])]
 #[UniqueEntity(fields: ['email'], message: 'There is already an account with this email')]
-class User implements UserInterface, PasswordAuthenticatedUserInterface
+final class User implements UserInterface, PasswordAuthenticatedUserInterface
 {
     #[ORM\Column(type: UuidType::NAME, unique: true)]
     #[ORM\CustomIdGenerator(class: 'doctrine.uuid_generator')]