diff --git a/files/lib/acp/page/CommandTriggerListPage.class.php b/files/lib/acp/page/CommandTriggerListPage.class.php
index e6d0922..d8e7cbc 100644
--- a/files/lib/acp/page/CommandTriggerListPage.class.php
+++ b/files/lib/acp/page/CommandTriggerListPage.class.php
@@ -21,7 +21,7 @@
 /**
  * Shows the command trigger list.
  */
-class CommandTriggerListPage extends SortablePage
+final class CommandTriggerListPage extends SortablePage
 {
     /**
      * @inheritDoc
diff --git a/files/lib/acp/page/RoomListPage.class.php b/files/lib/acp/page/RoomListPage.class.php
index 9b1bcae..44682f4 100644
--- a/files/lib/acp/page/RoomListPage.class.php
+++ b/files/lib/acp/page/RoomListPage.class.php
@@ -21,7 +21,7 @@
 /**
  * Shows the room list.
  */
-class RoomListPage extends SortablePage
+final class RoomListPage extends SortablePage
 {
     /**
      * @inheritDoc
diff --git a/files/lib/acp/page/SuspensionListPage.class.php b/files/lib/acp/page/SuspensionListPage.class.php
index 1f142eb..a163718 100644
--- a/files/lib/acp/page/SuspensionListPage.class.php
+++ b/files/lib/acp/page/SuspensionListPage.class.php
@@ -29,7 +29,7 @@
 /**
  * Shows the suspension list.
  */
-class SuspensionListPage extends SortablePage
+final class SuspensionListPage extends SortablePage
 {
     /**
      * @inheritDoc
diff --git a/files/lib/page/LogPage.class.php b/files/lib/page/LogPage.class.php
index 5fa884c..b7bf205 100644
--- a/files/lib/page/LogPage.class.php
+++ b/files/lib/page/LogPage.class.php
@@ -31,7 +31,7 @@
 /**
  * Shows the log of a specific chat room.
  */
-class LogPage extends AbstractPage
+final class LogPage extends AbstractPage
 {
     use TConfiguredPage;
 
diff --git a/files/lib/page/RoomListPage.class.php b/files/lib/page/RoomListPage.class.php
index 4097f82..84b77b3 100644
--- a/files/lib/page/RoomListPage.class.php
+++ b/files/lib/page/RoomListPage.class.php
@@ -24,7 +24,7 @@
 /**
  * Shows the list of available chat rooms.
  */
-class RoomListPage extends AbstractPage
+final class RoomListPage extends AbstractPage
 {
     /**
      * @inheritDoc
diff --git a/files/lib/page/RoomPage.class.php b/files/lib/page/RoomPage.class.php
index 34e2f8d..660c853 100644
--- a/files/lib/page/RoomPage.class.php
+++ b/files/lib/page/RoomPage.class.php
@@ -28,7 +28,7 @@
 /**
  * Shows a specific chat room.
  */
-class RoomPage extends AbstractPage
+final class RoomPage extends AbstractPage
 {
     use TConfiguredPage;