diff --git a/src/Constants.php b/src/Constants.php
index 1edd1018..be1ce73d 100644
--- a/src/Constants.php
+++ b/src/Constants.php
@@ -17,11 +17,11 @@ class Constants
     /**
      * The current release version
      */
-    public const VERSION = '2.2.0';
+    public const VERSION = '2.2.1';
     /**
      * The current release: major * 10000 + minor * 100 + patch
      */
-    public const VERSION_ID = 20200;
+    public const VERSION_ID = 20201;
     /**
      * The software name
      */
diff --git a/src/Form/ContractByUserForm.php b/src/Form/ContractByUserForm.php
index 69ea570b..e945d213 100644
--- a/src/Form/ContractByUserForm.php
+++ b/src/Form/ContractByUserForm.php
@@ -16,7 +16,7 @@ use Symfony\Component\Form\AbstractType;
  */
 final class ContractByUserForm extends AbstractType
 {
-    public function getParent(): ?string
+    public function getParent(): string
     {
         return YearByUserForm::class;
     }
diff --git a/src/Twig/SecurityPolicy/InvoicePolicy.php b/src/Twig/SecurityPolicy/InvoicePolicy.php
index cf1471ff..ed459228 100644
--- a/src/Twig/SecurityPolicy/InvoicePolicy.php
+++ b/src/Twig/SecurityPolicy/InvoicePolicy.php
@@ -169,6 +169,10 @@ final class InvoicePolicy implements SecurityPolicyInterface
                 // vendor/symfony/twig-bridge/Extension/AssetExtension.php
                 'asset',
 
+                // =================================================================
+                // vendor/symfony/twig-bridge/Extension/SecurityExtension.php
+                'is_granted',
+
                 // =================================================================
                 // Twig/RuntimeExtensions.php
                 'qr_code_data_uri',
@@ -176,6 +180,12 @@ final class InvoicePolicy implements SecurityPolicyInterface
                 // =================================================================
                 // Twig/Configuration.php
                 'config',
+
+                // =================================================================
+                // Twig/LocaleFormatExtensions.php
+                'create_date',
+                'month_names',
+                'locale_format',
             ]
         ));
     }