diff --git a/Models/NullWikiCategory.php b/Models/NullWikiCategory.php
index 92b11d6..c34d539 100644
--- a/Models/NullWikiCategory.php
+++ b/Models/NullWikiCategory.php
@@ -22,6 +22,6 @@ namespace Modules\Knowledgebase\Models;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class NullWikiCategory extends WikiCategory
+class NullWikiCategory extends WikiCategory
 {
 }
diff --git a/Models/NullWikiDoc.php b/Models/NullWikiDoc.php
index 8f432d6..3c64996 100644
--- a/Models/NullWikiDoc.php
+++ b/Models/NullWikiDoc.php
@@ -22,6 +22,6 @@ namespace Modules\Knowledgebase\Models;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class NullWikiDoc extends WikiDoc
+class NullWikiDoc extends WikiDoc
 {
 }
diff --git a/Models/WikiBadge.php b/Models/WikiBadge.php
index 2c6c113..adac972 100644
--- a/Models/WikiBadge.php
+++ b/Models/WikiBadge.php
@@ -22,7 +22,7 @@ namespace Modules\Knowledgebase\Models;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class WikiBadge implements \JsonSerializable
+class WikiBadge implements \JsonSerializable
 {
     private $id = 0;
 
diff --git a/Models/WikiCategory.php b/Models/WikiCategory.php
index 8fadf0e..3d69683 100644
--- a/Models/WikiCategory.php
+++ b/Models/WikiCategory.php
@@ -22,7 +22,7 @@ namespace Modules\Knowledgebase\Models;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class WikiCategory implements \JsonSerializable
+class WikiCategory implements \JsonSerializable
 {
     private $id = 0;
 
diff --git a/Models/WikiDoc.php b/Models/WikiDoc.php
index c460bbd..a814379 100644
--- a/Models/WikiDoc.php
+++ b/Models/WikiDoc.php
@@ -22,7 +22,7 @@ namespace Modules\Knowledgebase\Models;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class WikiDoc implements \JsonSerializable
+class WikiDoc implements \JsonSerializable
 {
     private $id = 0;