diff --git a/composer.json b/composer.json
index 81372b6..4515132 100644
--- a/composer.json
+++ b/composer.json
@@ -1,7 +1,7 @@
 {
     "name": "easybill/e-invoicing",
-    "version": "0.2.2",
-    "description": "A package to read and create the formats: factur-x, Peppol BIS Billing, XRechnung (CII/UBL)",
+    "version": "0.2.3",
+    "description": "A package to read and create EN16931 e-invoices or CIUS like: XRechnung, ZUGFeRD etc.",
     "type": "library",
     "license": "MIT",
     "keywords": [
diff --git a/composer.lock b/composer.lock
index 0a29aee..2710b79 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "5b17d51c5100bb0528bcb9475b334094",
+    "content-hash": "2fdb66387273df3d8a9ee0869283f74b",
     "packages": [
         {
             "name": "doctrine/instantiator",
@@ -602,24 +602,24 @@
         },
         {
             "name": "composer/semver",
-            "version": "3.4.2",
+            "version": "3.4.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/composer/semver.git",
-                "reference": "c51258e759afdb17f1fd1fe83bc12baaef6309d6"
+                "reference": "4313d26ada5e0c4edfbd1dc481a92ff7bff91f12"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/composer/semver/zipball/c51258e759afdb17f1fd1fe83bc12baaef6309d6",
-                "reference": "c51258e759afdb17f1fd1fe83bc12baaef6309d6",
+                "url": "https://api.github.com/repos/composer/semver/zipball/4313d26ada5e0c4edfbd1dc481a92ff7bff91f12",
+                "reference": "4313d26ada5e0c4edfbd1dc481a92ff7bff91f12",
                 "shasum": ""
             },
             "require": {
                 "php": "^5.3.2 || ^7.0 || ^8.0"
             },
             "require-dev": {
-                "phpstan/phpstan": "^1.4",
-                "symfony/phpunit-bridge": "^4.2 || ^5"
+                "phpstan/phpstan": "^1.11",
+                "symfony/phpunit-bridge": "^3 || ^7"
             },
             "type": "library",
             "extra": {
@@ -663,7 +663,7 @@
             "support": {
                 "irc": "ircs://irc.libera.chat:6697/composer",
                 "issues": "https://github.com/composer/semver/issues",
-                "source": "https://github.com/composer/semver/tree/3.4.2"
+                "source": "https://github.com/composer/semver/tree/3.4.3"
             },
             "funding": [
                 {
@@ -679,7 +679,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2024-07-12T11:35:52+00:00"
+            "time": "2024-09-19T14:15:21+00:00"
         },
         {
             "name": "composer/xdebug-handler",
@@ -2307,16 +2307,16 @@
         },
         {
             "name": "phpstan/phpstan",
-            "version": "1.12.3",
+            "version": "1.12.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpstan/phpstan.git",
-                "reference": "0fcbf194ab63d8159bb70d9aa3e1350051632009"
+                "reference": "ffa517cb918591b93acc9b95c0bebdcd0e4538bd"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/0fcbf194ab63d8159bb70d9aa3e1350051632009",
-                "reference": "0fcbf194ab63d8159bb70d9aa3e1350051632009",
+                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/ffa517cb918591b93acc9b95c0bebdcd0e4538bd",
+                "reference": "ffa517cb918591b93acc9b95c0bebdcd0e4538bd",
                 "shasum": ""
             },
             "require": {
@@ -2361,7 +2361,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2024-09-09T08:10:35+00:00"
+            "time": "2024-09-19T07:58:01+00:00"
         },
         {
             "name": "phpunit/php-code-coverage",
diff --git a/src/CII/Models/HeaderTradeSettlement.php b/src/CII/Models/HeaderTradeSettlement.php
index 37b84a0..c4a6f67 100644
--- a/src/CII/Models/HeaderTradeSettlement.php
+++ b/src/CII/Models/HeaderTradeSettlement.php
@@ -70,12 +70,10 @@ final class HeaderTradeSettlement
     #[XmlList(entry: 'SpecifiedLogisticsServiceCharge', inline: true, namespace: 'urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100')]
     public array $specifiedLogisticsServiceCharge = [];
 
-    /**
-     * @var TradePaymentTerms[]
-     */
-    #[Type('array<easybill\eInvoicing\CII\Models\TradePaymentTerms>')]
-    #[XmlList(entry: 'SpecifiedTradePaymentTerms', inline: true, namespace: 'urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100')]
-    public array $specifiedTradePaymentTerms = [];
+    #[Type(TradePaymentTerms::class)]
+    #[XmlElement(cdata: false, namespace: 'urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100')]
+    #[SerializedName('SpecifiedTradePaymentTerms')]
+    public ?TradePaymentTerms $specifiedTradePaymentTerms = null;
 
     #[Type(TradeSettlementHeaderMonetarySummation::class)]
     #[XmlElement(cdata: false, namespace: 'urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100')]
diff --git a/tests/Integration/CIITest.php b/tests/Integration/CIITest.php
index bd1e412..1f91c5a 100644
--- a/tests/Integration/CIITest.php
+++ b/tests/Integration/CIITest.php
@@ -143,7 +143,7 @@ function () {
         $headerTax2->calculatedAmount = Amount::create('37.62');
         $headerTax2->rateApplicablePercent = '19.00';
 
-        $invoice->supplyChainTradeTransaction->applicableHeaderTradeSettlement->specifiedTradePaymentTerms[] = $paymentTerms = new TradePaymentTerms();
+        $invoice->supplyChainTradeTransaction->applicableHeaderTradeSettlement->specifiedTradePaymentTerms = $paymentTerms = new TradePaymentTerms();
         $paymentTerms->description = 'Zahlbar innerhalb 30 Tagen netto bis 04.04.2018, 3% Skonto innerhalb 10 Tagen bis 15.03.2018';
 
         $invoice->supplyChainTradeTransaction->applicableHeaderTradeSettlement->specifiedTradeSettlementHeaderMonetarySummation = $summation = new TradeSettlementHeaderMonetarySummation();