diff --git a/Models/Balance.php b/Models/Balance.php
index 32e8969..8b66c65 100644
--- a/Models/Balance.php
+++ b/Models/Balance.php
@@ -24,7 +24,7 @@ use phpOMS\Utils\IO\ExchangeInterface;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class Balance
+class Balance
 {
 
     /**
diff --git a/Models/BatchPosting.php b/Models/BatchPosting.php
index 895b8f5..13df748 100644
--- a/Models/BatchPosting.php
+++ b/Models/BatchPosting.php
@@ -22,7 +22,7 @@ namespace Modules\Accounting\Models;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class BatchPosting implements \Countable
+class BatchPosting implements \Countable
 {
 
     /**
diff --git a/Models/Creditor.php b/Models/Creditor.php
index 96dc403..00bdf1a 100644
--- a/Models/Creditor.php
+++ b/Models/Creditor.php
@@ -22,7 +22,7 @@ namespace Modules\Accounting\Models;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class Creditor
+class Creditor
 {
 
     /**
diff --git a/Models/Debitor.php b/Models/Debitor.php
index 429b4f3..7f27583 100644
--- a/Models/Debitor.php
+++ b/Models/Debitor.php
@@ -22,7 +22,7 @@ namespace Modules\Accounting\Models;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class Debitor
+class Debitor
 {
 
     /**
diff --git a/Models/ImpersonalAccount.php b/Models/ImpersonalAccount.php
index c87f378..3076193 100644
--- a/Models/ImpersonalAccount.php
+++ b/Models/ImpersonalAccount.php
@@ -24,7 +24,7 @@ use phpOMS\Utils\IO\ExchangeInterface;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class ImpersonalAccount
+class ImpersonalAccount
 {
 
     /**
diff --git a/Models/IncomeStatement.php b/Models/IncomeStatement.php
index ab784b3..0166ab0 100644
--- a/Models/IncomeStatement.php
+++ b/Models/IncomeStatement.php
@@ -22,7 +22,7 @@ namespace Modules\Accounting\Models;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class IncomeStatement
+class IncomeStatement
 {
     private $id = 0;
 
diff --git a/Models/InvoicePosting.php b/Models/InvoicePosting.php
index 8791d30..416e9ce 100644
--- a/Models/InvoicePosting.php
+++ b/Models/InvoicePosting.php
@@ -22,7 +22,7 @@ namespace Modules\Accounting\Models;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class InvoicePosting extends PostingAbstract
+class InvoicePosting extends PostingAbstract
 {
 
     /**