diff --git a/VERSION.txt b/VERSION.txt
index 1c67831475a1..030ab30ddf86 100644
--- a/VERSION.txt
+++ b/VERSION.txt
@@ -1 +1 @@
-5.6.27
\ No newline at end of file
+5.6.28
\ No newline at end of file
diff --git a/app/Services/Invoice/EInvoice/FacturaEInvoice.php b/app/Services/Invoice/EInvoice/FacturaEInvoice.php
index 12be24138c9e..9f97da9e4519 100644
--- a/app/Services/Invoice/EInvoice/FacturaEInvoice.php
+++ b/app/Services/Invoice/EInvoice/FacturaEInvoice.php
@@ -483,8 +483,8 @@ class FacturaEInvoice extends AbstractService
             "fax" => "",
             "website" => substr($company->settings->website, 0, 50),
             "contactPeople" => substr($company->owner()->present()->name(), 0, 40),
-            "firstName" => $company->owner()->present()->firstName(),
-            "lastName" => $company->owner()->present()->lastName(),
+            "firstSurname" => $company->owner()->present()->firstName(),
+            "lastSurname" => $company->owner()->present()->lastName(),
             // 'centres' => $this->setFace(),
             // "cnoCnae" => "04647", // Clasif. Nacional de Act. Económicas
             // "ineTownCode" => "280796" // Cód. de municipio del INE
diff --git a/config/ninja.php b/config/ninja.php
index 9224ceb0f9a6..52ba2c49801d 100644
--- a/config/ninja.php
+++ b/config/ninja.php
@@ -15,8 +15,8 @@ return [
     'require_https' => env('REQUIRE_HTTPS', true),
     'app_url' => rtrim(env('APP_URL', ''), '/'),
     'app_domain' => env('APP_DOMAIN', 'invoicing.co'),
-    'app_version' => env('APP_VERSION','5.6.27'),
-    'app_tag' => env('APP_TAG','5.6.27'),
+    'app_version' => env('APP_VERSION','5.6.28'),
+    'app_tag' => env('APP_TAG','5.6.28'),
     'minimum_client_version' => '5.0.16',
     'terms_version' => '1.0.1',
     'api_secret' => env('API_SECRET', ''),