diff --git a/exceptions/MDMailerEncryptionFailedException.php b/exceptions/MDMailerEncryptionFailedException.php
index 73393d1..8f8fa51 100644
--- a/exceptions/MDMailerEncryptionFailedException.php
+++ b/exceptions/MDMailerEncryptionFailedException.php
@@ -4,7 +4,7 @@ declare(strict_types = 1);
 /**
  * Exception to be thrown
  */
-final class MDMailerEncryptionFailedException {
+final class MDMailerEncryptionFailedException extends Exception {
     /**
      * Error message.
      *