diff --git a/files/lib/system/suspension/BanSuspension.class.php b/files/lib/system/suspension/BanSuspension.class.php
index 106bb07..385defc 100644
--- a/files/lib/system/suspension/BanSuspension.class.php
+++ b/files/lib/system/suspension/BanSuspension.class.php
@@ -22,7 +22,7 @@
 /**
  * BanSuspension removes join privileges.
  */
-class BanSuspension implements ISuspension
+final class BanSuspension implements ISuspension
 {
     /**
      * @inheritDoc
diff --git a/files/lib/system/suspension/MuteSuspension.class.php b/files/lib/system/suspension/MuteSuspension.class.php
index c18c455..5de126b 100644
--- a/files/lib/system/suspension/MuteSuspension.class.php
+++ b/files/lib/system/suspension/MuteSuspension.class.php
@@ -22,7 +22,7 @@
 /**
  * MuteSuspension removes write privileges.
  */
-class MuteSuspension implements ISuspension
+final class MuteSuspension implements ISuspension
 {
     /**
      * @inheritDoc