diff --git a/app/Events/Component/ComponentWasAddedEvent.php b/app/Events/Component/ComponentWasAddedEvent.php
index c3332161..7aacd7e6 100644
--- a/app/Events/Component/ComponentWasAddedEvent.php
+++ b/app/Events/Component/ComponentWasAddedEvent.php
@@ -13,7 +13,7 @@ namespace CachetHQ\Cachet\Events\Component;
 
 use CachetHQ\Cachet\Models\Component;
 
-class ComponentWasAddedEvent implements ComponentEventInterface
+final class ComponentWasAddedEvent implements ComponentEventInterface
 {
     /**
      * The component that was added.
diff --git a/app/Events/Component/ComponentWasRemovedEvent.php b/app/Events/Component/ComponentWasRemovedEvent.php
index 6c28bca4..838e9c93 100644
--- a/app/Events/Component/ComponentWasRemovedEvent.php
+++ b/app/Events/Component/ComponentWasRemovedEvent.php
@@ -13,7 +13,7 @@ namespace CachetHQ\Cachet\Events\Component;
 
 use CachetHQ\Cachet\Models\Component;
 
-class ComponentWasRemovedEvent implements ComponentEventInterface
+final class ComponentWasRemovedEvent implements ComponentEventInterface
 {
     /**
      * The component that was removed.
diff --git a/app/Events/Component/ComponentWasUpdatedEvent.php b/app/Events/Component/ComponentWasUpdatedEvent.php
index 4d3daecb..5a2b626b 100644
--- a/app/Events/Component/ComponentWasUpdatedEvent.php
+++ b/app/Events/Component/ComponentWasUpdatedEvent.php
@@ -13,7 +13,7 @@ namespace CachetHQ\Cachet\Events\Component;
 
 use CachetHQ\Cachet\Models\Component;
 
-class ComponentWasUpdatedEvent implements ComponentEventInterface
+final class ComponentWasUpdatedEvent implements ComponentEventInterface
 {
     /**
      * The component that was updated.
diff --git a/app/Events/ComponentGroup/ComponentGroupWasAddedEvent.php b/app/Events/ComponentGroup/ComponentGroupWasAddedEvent.php
index b6760be1..868b7d0e 100644
--- a/app/Events/ComponentGroup/ComponentGroupWasAddedEvent.php
+++ b/app/Events/ComponentGroup/ComponentGroupWasAddedEvent.php
@@ -13,7 +13,7 @@ namespace CachetHQ\Cachet\Events\ComponentGroup;
 
 use CachetHQ\Cachet\Models\ComponentGroup;
 
-class ComponentGroupWasAddedEvent implements ComponentGroupEventInterface
+final class ComponentGroupWasAddedEvent implements ComponentGroupEventInterface
 {
     /**
      * The component group that was added.
diff --git a/app/Events/ComponentGroup/ComponentGroupWasRemovedEvent.php b/app/Events/ComponentGroup/ComponentGroupWasRemovedEvent.php
index b32c9e45..4231ed88 100644
--- a/app/Events/ComponentGroup/ComponentGroupWasRemovedEvent.php
+++ b/app/Events/ComponentGroup/ComponentGroupWasRemovedEvent.php
@@ -13,7 +13,7 @@ namespace CachetHQ\Cachet\Events\ComponentGroup;
 
 use CachetHQ\Cachet\Models\ComponentGroup;
 
-class ComponentGroupWasRemovedEvent implements ComponentGroupEventInterface
+final class ComponentGroupWasRemovedEvent implements ComponentGroupEventInterface
 {
     /**
      * The component group that was removed.
diff --git a/app/Events/ComponentGroup/ComponentGroupWasUpdatedEvent.php b/app/Events/ComponentGroup/ComponentGroupWasUpdatedEvent.php
index c70a3165..8eb58d7e 100644
--- a/app/Events/ComponentGroup/ComponentGroupWasUpdatedEvent.php
+++ b/app/Events/ComponentGroup/ComponentGroupWasUpdatedEvent.php
@@ -13,7 +13,7 @@ namespace CachetHQ\Cachet\Events\ComponentGroup;
 
 use CachetHQ\Cachet\Models\ComponentGroup;
 
-class ComponentGroupWasUpdatedEvent implements ComponentGroupEventInterface
+final class ComponentGroupWasUpdatedEvent implements ComponentGroupEventInterface
 {
     /**
      * The component group that was updated.
diff --git a/app/Events/Incident/IncidentWasRemovedEvent.php b/app/Events/Incident/IncidentWasRemovedEvent.php
index 2ea4934f..a53060a2 100644
--- a/app/Events/Incident/IncidentWasRemovedEvent.php
+++ b/app/Events/Incident/IncidentWasRemovedEvent.php
@@ -13,7 +13,7 @@ namespace CachetHQ\Cachet\Events\Incident;
 
 use CachetHQ\Cachet\Models\Incident;
 
-class IncidentWasRemovedEvent implements IncidentEventInterface
+final class IncidentWasRemovedEvent implements IncidentEventInterface
 {
     /**
      * The incident that has been removed.
diff --git a/app/Events/Incident/IncidentWasReportedEvent.php b/app/Events/Incident/IncidentWasReportedEvent.php
index 00eb6930..a791dd8f 100644
--- a/app/Events/Incident/IncidentWasReportedEvent.php
+++ b/app/Events/Incident/IncidentWasReportedEvent.php
@@ -13,7 +13,7 @@ namespace CachetHQ\Cachet\Events\Incident;
 
 use CachetHQ\Cachet\Models\Incident;
 
-class IncidentWasReportedEvent implements IncidentEventInterface
+final class IncidentWasReportedEvent implements IncidentEventInterface
 {
     /**
      * The incident that has been reported.
diff --git a/app/Events/Incident/IncidentWasUpdatedEvent.php b/app/Events/Incident/IncidentWasUpdatedEvent.php
index a5352b28..52b847d0 100644
--- a/app/Events/Incident/IncidentWasUpdatedEvent.php
+++ b/app/Events/Incident/IncidentWasUpdatedEvent.php
@@ -13,7 +13,7 @@ namespace CachetHQ\Cachet\Events\Incident;
 
 use CachetHQ\Cachet\Models\Incident;
 
-class IncidentWasUpdatedEvent implements IncidentEventInterface
+final class IncidentWasUpdatedEvent implements IncidentEventInterface
 {
     /**
      * The incident that has been updated.
diff --git a/app/Events/Incident/MaintenanceWasScheduledEvent.php b/app/Events/Incident/MaintenanceWasScheduledEvent.php
index 688940be..7ccce3e2 100644
--- a/app/Events/Incident/MaintenanceWasScheduledEvent.php
+++ b/app/Events/Incident/MaintenanceWasScheduledEvent.php
@@ -13,7 +13,7 @@ namespace CachetHQ\Cachet\Events\Incident;
 
 use CachetHQ\Cachet\Models\Incident;
 
-class MaintenanceWasScheduledEvent implements IncidentEventInterface
+final class MaintenanceWasScheduledEvent implements IncidentEventInterface
 {
     /**
      * The incident that has been reported.
diff --git a/app/Events/Metric/MetricPointWasAddedEvent.php b/app/Events/Metric/MetricPointWasAddedEvent.php
index d2c8a2b3..e081f024 100644
--- a/app/Events/Metric/MetricPointWasAddedEvent.php
+++ b/app/Events/Metric/MetricPointWasAddedEvent.php
@@ -13,7 +13,7 @@ namespace CachetHQ\Cachet\Events\Metric;
 
 use CachetHQ\Cachet\Models\MetricPoint;
 
-class MetricPointWasAddedEvent implements MetricEventInterface
+final class MetricPointWasAddedEvent implements MetricEventInterface
 {
     /**
      * The metric point that was added.
diff --git a/app/Events/Metric/MetricPointWasRemovedEvent.php b/app/Events/Metric/MetricPointWasRemovedEvent.php
index 7b919495..18a83051 100644
--- a/app/Events/Metric/MetricPointWasRemovedEvent.php
+++ b/app/Events/Metric/MetricPointWasRemovedEvent.php
@@ -13,7 +13,7 @@ namespace CachetHQ\Cachet\Events\Metric;
 
 use CachetHQ\Cachet\Models\MetricPoint;
 
-class MetricPointWasRemovedEvent implements MetricEventInterface
+final class MetricPointWasRemovedEvent implements MetricEventInterface
 {
     /**
      * The metric point that was removed.
diff --git a/app/Events/Metric/MetricPointWasUpdatedEvent.php b/app/Events/Metric/MetricPointWasUpdatedEvent.php
index ce2ea986..d1d9e0b0 100644
--- a/app/Events/Metric/MetricPointWasUpdatedEvent.php
+++ b/app/Events/Metric/MetricPointWasUpdatedEvent.php
@@ -13,7 +13,7 @@ namespace CachetHQ\Cachet\Events\Metric;
 
 use CachetHQ\Cachet\Models\MetricPoint;
 
-class MetricPointWasUpdatedEvent implements MetricEventInterface
+final class MetricPointWasUpdatedEvent implements MetricEventInterface
 {
     /**
      * The metric point that was updated.
diff --git a/app/Events/Metric/MetricWasAddedEvent.php b/app/Events/Metric/MetricWasAddedEvent.php
index bbc14664..c097f090 100644
--- a/app/Events/Metric/MetricWasAddedEvent.php
+++ b/app/Events/Metric/MetricWasAddedEvent.php
@@ -13,7 +13,7 @@ namespace CachetHQ\Cachet\Events\Metric;
 
 use CachetHQ\Cachet\Models\Metric;
 
-class MetricWasAddedEvent implements MetricEventInterface
+final class MetricWasAddedEvent implements MetricEventInterface
 {
     /**
      * The metric that was added.
diff --git a/app/Events/Metric/MetricWasRemovedEvent.php b/app/Events/Metric/MetricWasRemovedEvent.php
index bd78e43d..abbff8c0 100644
--- a/app/Events/Metric/MetricWasRemovedEvent.php
+++ b/app/Events/Metric/MetricWasRemovedEvent.php
@@ -13,7 +13,7 @@ namespace CachetHQ\Cachet\Events\Metric;
 
 use CachetHQ\Cachet\Models\Metric;
 
-class MetricWasRemovedEvent implements MetricEventInterface
+final class MetricWasRemovedEvent implements MetricEventInterface
 {
     /**
      * The metric that was removed.
diff --git a/app/Events/Metric/MetricWasUpdatedEvent.php b/app/Events/Metric/MetricWasUpdatedEvent.php
index 8dc1de20..b3343aad 100644
--- a/app/Events/Metric/MetricWasUpdatedEvent.php
+++ b/app/Events/Metric/MetricWasUpdatedEvent.php
@@ -13,7 +13,7 @@ namespace CachetHQ\Cachet\Events\Metric;
 
 use CachetHQ\Cachet\Models\Metric;
 
-class MetricWasUpdatedEvent implements MetricEventInterface
+final class MetricWasUpdatedEvent implements MetricEventInterface
 {
     /**
      * The metric that was updated.
diff --git a/app/Events/Subscriber/SubscriberHasSubscribedEvent.php b/app/Events/Subscriber/SubscriberHasSubscribedEvent.php
index 26cd90f7..964f7f61 100644
--- a/app/Events/Subscriber/SubscriberHasSubscribedEvent.php
+++ b/app/Events/Subscriber/SubscriberHasSubscribedEvent.php
@@ -13,7 +13,7 @@ namespace CachetHQ\Cachet\Events\Subscriber;
 
 use CachetHQ\Cachet\Models\Subscriber;
 
-class SubscriberHasSubscribedEvent implements SubscriberEventInterface
+final class SubscriberHasSubscribedEvent implements SubscriberEventInterface
 {
     /**
      * The subscriber who has subscribed.
diff --git a/app/Events/Subscriber/SubscriberHasUnsubscribedEvent.php b/app/Events/Subscriber/SubscriberHasUnsubscribedEvent.php
index bb428577..77beed3d 100644
--- a/app/Events/Subscriber/SubscriberHasUnsubscribedEvent.php
+++ b/app/Events/Subscriber/SubscriberHasUnsubscribedEvent.php
@@ -13,7 +13,7 @@ namespace CachetHQ\Cachet\Events\Subscriber;
 
 use CachetHQ\Cachet\Models\Subscriber;
 
-class SubscriberHasUnsubscribedEvent implements SubscriberEventInterface
+final class SubscriberHasUnsubscribedEvent implements SubscriberEventInterface
 {
     /**
      * The subscriber who has unsubscribed.
diff --git a/app/Events/Subscriber/SubscriberHasVerifiedEvent.php b/app/Events/Subscriber/SubscriberHasVerifiedEvent.php
index a99fdb76..08644a41 100644
--- a/app/Events/Subscriber/SubscriberHasVerifiedEvent.php
+++ b/app/Events/Subscriber/SubscriberHasVerifiedEvent.php
@@ -13,7 +13,7 @@ namespace CachetHQ\Cachet\Events\Subscriber;
 
 use CachetHQ\Cachet\Models\Subscriber;
 
-class SubscriberHasVerifiedEvent implements SubscriberEventInterface
+final class SubscriberHasVerifiedEvent implements SubscriberEventInterface
 {
     /**
      * The subscriber who has verified.
diff --git a/app/Events/User/UserWasInvitedEvent.php b/app/Events/User/UserWasInvitedEvent.php
index 2671c10d..bf16b6df 100644
--- a/app/Events/User/UserWasInvitedEvent.php
+++ b/app/Events/User/UserWasInvitedEvent.php
@@ -13,7 +13,7 @@ namespace CachetHQ\Cachet\Events\User;
 
 use CachetHQ\Cachet\Models\Invite;
 
-final class UserWasInvitedEvent
+final class UserWasInvitedEvent implements UserEventInterface
 {
     /**
      * The invite that has been added.