diff --git a/src/Symfony/Component/Workflow/Event/AnnounceEvent.php b/src/Symfony/Component/Workflow/Event/AnnounceEvent.php
index 7d3d7409a11fe..b6e5c25f6b7dc 100644
--- a/src/Symfony/Component/Workflow/Event/AnnounceEvent.php
+++ b/src/Symfony/Component/Workflow/Event/AnnounceEvent.php
@@ -11,6 +11,10 @@
 
 namespace Symfony\Component\Workflow\Event;
 
+/**
+ * @template TSubject of object
+ * @extends Event<TSubject>
+ */
 final class AnnounceEvent extends Event
 {
 }
diff --git a/src/Symfony/Component/Workflow/Event/CompletedEvent.php b/src/Symfony/Component/Workflow/Event/CompletedEvent.php
index 883390e958f43..184a5cf554c2d 100644
--- a/src/Symfony/Component/Workflow/Event/CompletedEvent.php
+++ b/src/Symfony/Component/Workflow/Event/CompletedEvent.php
@@ -11,6 +11,10 @@
 
 namespace Symfony\Component\Workflow\Event;
 
+/**
+ * @template TSubject of object
+ * @extends Event<TSubject>
+ */
 final class CompletedEvent extends Event
 {
 }
diff --git a/src/Symfony/Component/Workflow/Event/EnterEvent.php b/src/Symfony/Component/Workflow/Event/EnterEvent.php
index 3296f29da9a6c..47224aba2e14d 100644
--- a/src/Symfony/Component/Workflow/Event/EnterEvent.php
+++ b/src/Symfony/Component/Workflow/Event/EnterEvent.php
@@ -11,6 +11,10 @@
 
 namespace Symfony\Component\Workflow\Event;
 
+/**
+ * @template TSubject of object
+ * @extends Event<TSubject>
+ */
 final class EnterEvent extends Event
 {
 }
diff --git a/src/Symfony/Component/Workflow/Event/EnteredEvent.php b/src/Symfony/Component/Workflow/Event/EnteredEvent.php
index ea3624b425cad..baea29ff7acdc 100644
--- a/src/Symfony/Component/Workflow/Event/EnteredEvent.php
+++ b/src/Symfony/Component/Workflow/Event/EnteredEvent.php
@@ -11,6 +11,10 @@
 
 namespace Symfony\Component\Workflow\Event;
 
+/**
+ * @template TSubject of object
+ * @extends Event<TSubject>
+ */
 final class EnteredEvent extends Event
 {
 }
diff --git a/src/Symfony/Component/Workflow/Event/Event.php b/src/Symfony/Component/Workflow/Event/Event.php
index e1f448a8b5168..0945301cec46b 100644
--- a/src/Symfony/Component/Workflow/Event/Event.php
+++ b/src/Symfony/Component/Workflow/Event/Event.php
@@ -17,6 +17,8 @@
 use Symfony\Contracts\EventDispatcher\Event as BaseEvent;
 
 /**
+ * @template TSubject of object
+ *
  * @author Fabien Potencier <fabien@symfony.com>
  * @author Grégoire Pineau <lyrixx@lyrixx.info>
  * @author Carlos Pereira De Amorim <carlos@shauri.fr>
@@ -24,11 +26,17 @@
 class Event extends BaseEvent
 {
     protected $context;
+    /**
+     * @var TSubject
+     */
     private $subject;
     private $marking;
     private $transition;
     private $workflow;
 
+    /**
+     * @param TSubject $subject
+     */
     public function __construct(object $subject, Marking $marking, Transition $transition = null, WorkflowInterface $workflow = null, array $context = [])
     {
         $this->subject = $subject;
@@ -43,6 +51,9 @@ public function getMarking()
         return $this->marking;
     }
 
+    /**
+     * @return TSubject
+     */
     public function getSubject()
     {
         return $this->subject;
@@ -63,6 +74,9 @@ public function getWorkflowName()
         return $this->workflow->getName();
     }
 
+    /**
+     * @param TSubject $subject
+     */
     public function getMetadata(string $key, $subject)
     {
         return $this->workflow->getMetadataStore()->getMetadata($key, $subject);
diff --git a/src/Symfony/Component/Workflow/Event/GuardEvent.php b/src/Symfony/Component/Workflow/Event/GuardEvent.php
index 317fe8979fb4e..a11d18f61e9bc 100644
--- a/src/Symfony/Component/Workflow/Event/GuardEvent.php
+++ b/src/Symfony/Component/Workflow/Event/GuardEvent.php
@@ -18,6 +18,9 @@
 use Symfony\Component\Workflow\WorkflowInterface;
 
 /**
+ * @template TSubject of object
+ * @extends Event<TSubject>
+ *
  * @author Fabien Potencier <fabien@symfony.com>
  * @author Grégoire Pineau <lyrixx@lyrixx.info>
  */
@@ -26,7 +29,7 @@ final class GuardEvent extends Event
     private $transitionBlockerList;
 
     /**
-     * {@inheritdoc}
+     * @param TSubject $subject
      */
     public function __construct(object $subject, Marking $marking, Transition $transition, WorkflowInterface $workflow = null)
     {
diff --git a/src/Symfony/Component/Workflow/Event/LeaveEvent.php b/src/Symfony/Component/Workflow/Event/LeaveEvent.php
index d3d48cbd8e4f0..1191d160b158b 100644
--- a/src/Symfony/Component/Workflow/Event/LeaveEvent.php
+++ b/src/Symfony/Component/Workflow/Event/LeaveEvent.php
@@ -11,6 +11,10 @@
 
 namespace Symfony\Component\Workflow\Event;
 
+/**
+ * @template TSubject of object
+ * @extends Event<TSubject>
+ */
 final class LeaveEvent extends Event
 {
 }
diff --git a/src/Symfony/Component/Workflow/Event/TransitionEvent.php b/src/Symfony/Component/Workflow/Event/TransitionEvent.php
index 4710f90038324..cc7b9da998088 100644
--- a/src/Symfony/Component/Workflow/Event/TransitionEvent.php
+++ b/src/Symfony/Component/Workflow/Event/TransitionEvent.php
@@ -11,6 +11,10 @@
 
 namespace Symfony\Component\Workflow\Event;
 
+/**
+ * @template TSubject of object
+ * @extends Event<TSubject>
+ */
 final class TransitionEvent extends Event
 {
     public function setContext(array $context): void