diff --git a/app/Providers/ClientPortalServiceProvider.php b/app/Providers/ClientPortalServiceProvider.php
index 46abc838b0cc..5c134bdb8e90 100644
--- a/app/Providers/ClientPortalServiceProvider.php
+++ b/app/Providers/ClientPortalServiceProvider.php
@@ -1,4 +1,13 @@
 <?php
+/**
+ * Invoice Ninja (https://invoiceninja.com).
+ *
+ * @link https://github.com/invoiceninja/invoiceninja source repository
+ *
+ * @copyright Copyright (c) 2024. Invoice Ninja LLC (https://invoiceninja.com)
+ *
+ * @license https://www.elastic.co/licensing/elastic-license
+ */
 
 namespace App\Providers;
 
diff --git a/composer.lock b/composer.lock
index 601c13ab6363..e791c2541a4f 100644
--- a/composer.lock
+++ b/composer.lock
@@ -5076,12 +5076,12 @@
             "source": {
                 "type": "git",
                 "url": "https://github.com/invoiceninja/einvoice.git",
-                "reference": "da30e1542726b36cab8d48095dedaaecea5a0116"
+                "reference": "d1d416382b1949cc2cbb6501487f1592acf4d235"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/invoiceninja/einvoice/zipball/da30e1542726b36cab8d48095dedaaecea5a0116",
-                "reference": "da30e1542726b36cab8d48095dedaaecea5a0116",
+                "url": "https://api.github.com/repos/invoiceninja/einvoice/zipball/d1d416382b1949cc2cbb6501487f1592acf4d235",
+                "reference": "d1d416382b1949cc2cbb6501487f1592acf4d235",
                 "shasum": ""
             },
             "require": {
@@ -5094,6 +5094,7 @@
                 "symfony/validator": "^7"
             },
             "require-dev": {
+                "milo/schematron": "^1.0",
                 "nette/php-generator": "^4.1",
                 "phpstan/phpstan": "^1.11",
                 "phpunit/phpunit": "^10.5",
@@ -5120,7 +5121,7 @@
                 "source": "https://github.com/invoiceninja/einvoice/tree/main",
                 "issues": "https://github.com/invoiceninja/einvoice/issues"
             },
-            "time": "2024-05-27T06:05:25+00:00"
+            "time": "2024-05-27T23:02:56+00:00"
         },
         {
             "name": "invoiceninja/inspector",
@@ -17041,16 +17042,16 @@
         },
         {
             "name": "composer/pcre",
-            "version": "3.1.3",
+            "version": "3.1.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/composer/pcre.git",
-                "reference": "5b16e25a5355f1f3afdfc2f954a0a80aec4826a8"
+                "reference": "04229f163664973f68f38f6f73d917799168ef24"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/composer/pcre/zipball/5b16e25a5355f1f3afdfc2f954a0a80aec4826a8",
-                "reference": "5b16e25a5355f1f3afdfc2f954a0a80aec4826a8",
+                "url": "https://api.github.com/repos/composer/pcre/zipball/04229f163664973f68f38f6f73d917799168ef24",
+                "reference": "04229f163664973f68f38f6f73d917799168ef24",
                 "shasum": ""
             },
             "require": {
@@ -17092,7 +17093,7 @@
             ],
             "support": {
                 "issues": "https://github.com/composer/pcre/issues",
-                "source": "https://github.com/composer/pcre/tree/3.1.3"
+                "source": "https://github.com/composer/pcre/tree/3.1.4"
             },
             "funding": [
                 {
@@ -17108,7 +17109,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2024-03-19T10:26:25+00:00"
+            "time": "2024-05-27T13:40:54+00:00"
         },
         {
             "name": "composer/semver",
diff --git a/config/app.php b/config/app.php
index 225f88c32d82..4218d001a4bc 100644
--- a/config/app.php
+++ b/config/app.php
@@ -201,6 +201,8 @@ return [
         App\Providers\MultiDBProvider::class,
         App\Providers\ClientPortalServiceProvider::class,
         App\Providers\NinjaTranslationServiceProvider::class,
+        // App\Providers\StaticServiceProvider::class,
+
     ],
 
     /*
diff --git a/tests/Integration/Einvoice/Fact1Test.php b/tests/Integration/Einvoice/Fact1Test.php
index 8a48832cbd6e..ecb996b7210a 100644
--- a/tests/Integration/Einvoice/Fact1Test.php
+++ b/tests/Integration/Einvoice/Fact1Test.php
@@ -343,10 +343,6 @@ class Fact1Test extends TestCase
 
         $this->assertCount(0, $errors);
 
-
-
-
-
         $phpDocExtractor = new PhpDocExtractor();
         $reflectionExtractor = new ReflectionExtractor();
         // list of PropertyListExtractorInterface (any iterable)
@@ -370,18 +366,28 @@ class Fact1Test extends TestCase
             'xml_format_output' => true,
             'remove_empty_tags' => true,
         ];
+
         $encoder = new XmlEncoder($context);
         $classMetadataFactory = new ClassMetadataFactory(new AttributeLoader());
         $metadataAwareNameConverter = new MetadataAwareNameConverter($classMetadataFactory);
         $discriminator = new ClassDiscriminatorFromClassMetadata($classMetadataFactory);
+
         $normalizer = new ObjectNormalizer($classMetadataFactory, $metadataAwareNameConverter, null, $propertyInfo);
+        
         $normalizers = [  new DateTimeNormalizer(), $normalizer,  new ArrayDenormalizer() , ];
         $encoders = [$encoder, new JsonEncoder()];
         $serializer = new Serializer($normalizers, $encoders);
 
-        $dataxml = $serializer->encode($invoice, 'xml', $context);
+        $n_context = [
+            AbstractObjectNormalizer::SKIP_NULL_VALUES => true,
+            // AbstractObjectNormalizer::SKIP_UNINITIALIZED_VALUES => true,
+        ];
 
         
+        // $invoice = $normalizer->normalize($invoice, 'json', $n_context);
+        // echo print_r($invoice);
+        // $invoice = $serializer->serialize($invoice, 'xml', $n_context);
+        $dataxml = $serializer->encode($invoice, 'xml', $context);
 
         echo $dataxml;