diff --git a/exceptions/generic/MDInvalidEmail.php b/exceptions/generic/MDInvalidEmail.php
index 4334318..b807061 100644
--- a/exceptions/generic/MDInvalidEmail.php
+++ b/exceptions/generic/MDInvalidEmail.php
@@ -5,7 +5,7 @@ declare(strict_types = 1);
  * Exception thrown in case the main entity of a page (e.g. an object, an institution etc.)
  * are not set public.
  */
-class MDInvalidEmail extends MDgenericInvalidInputsException {
+final class MDInvalidEmail extends MDgenericInvalidInputsException {
 
     /**
      * Error message.
diff --git a/exceptions/generic/MDInvalidUrl.php b/exceptions/generic/MDInvalidUrl.php
index ec540fb..b1d741a 100644
--- a/exceptions/generic/MDInvalidUrl.php
+++ b/exceptions/generic/MDInvalidUrl.php
@@ -5,7 +5,7 @@ declare(strict_types = 1);
  * Exception thrown in case the main entity of a page (e.g. an object, an institution etc.)
  * are not set public.
  */
-class MDInvalidUrl extends MDgenericInvalidInputsException {
+final class MDInvalidUrl extends MDgenericInvalidInputsException {
 
     /**
      * Error message.