diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8ff8746..c157387 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## [v3.1.0] - 2024-10-01
+
+### Added
+- New setting for configuring the filename of the invoice document in the order confirmation email
+
 ## [v3.0.1] - 2024-09-28
 
 ### Fixed
@@ -88,6 +93,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - PDF file generated from order data with possibility to adjust some of the fields and regenerate the invoice file
 - Invoice generated in Shop's main language (if translation available)
 
+[v3.1.0]: https://github.com/Fresh-Advance/Invoice/compare/v3.0.1...v3.1.0
 [v3.0.1]: https://github.com/Fresh-Advance/Invoice/compare/v3.0.0...v3.0.1
 [v3.0.0]: https://github.com/Fresh-Advance/Invoice/compare/v2.2.0...v3.0.0
 [v2.2.0]: https://github.com/Fresh-Advance/Invoice/compare/v2.1.0...v2.2.0
diff --git a/README.md b/README.md
index f3d0532..4613e72 100644
--- a/README.md
+++ b/README.md
@@ -19,6 +19,8 @@
   * Invoice signer person
 * PDF Invoice file generated in shop Default language
   * Currently we have DE, EN and LT translations available. Feel free to add yours.
+* PDF Invoice can be automatically generated and attached to order confirmation email
+  * Invoice filename configurable through settings
 * Total sum shown in words in the invoice.
 * Only Twig shop installations supported
 * Tested with:
@@ -70,6 +72,16 @@ If so, create the file `var/configuration/shops/1/template_extension_chain.yaml`
   - oe_moduletemplate(please put your module id instead of the module template example)
 ```
 
+### More information you might need for the template
+
+The order variable in the template is the Order model object, so you can access all its fields and methods.
+
+Some examples you might need for achieving the desired result:
+
+* Customer number: {{ order.getOrderUser().getFieldData('oxcustnr') }}
+* Payment method: {{ order.getPaymentType().oxpayments__oxdesc.value }}
+* Order net sum: {{ order.getOrderNetSum() }}
+
 ## License
 
 Please make sure you checked the License before using the module. License
diff --git a/metadata.php b/metadata.php
index 1fc9b29..b6b511a 100644
--- a/metadata.php
+++ b/metadata.php
@@ -22,7 +22,7 @@
         'en' => 'Invoice module for OXID eShop.',
     ],
     'thumbnail' => 'logo.png',
-    'version' => '3.0.1',
+    'version' => '3.1.0',
     'author' => 'Anton Fedurtsya',
     'email' => 'anton@fedurtsya.com',
     'url' => 'https://github.com/Fresh-Advance',
@@ -114,6 +114,12 @@
             'type' => 'bool',
             'value' => false
         ],
+        [
+            'group' => 'fa_invoice_emails',
+            'name' => \FreshAdvance\Invoice\Settings\ModuleSettings::SETTING_INVOICE_ON_ORDER_EMAIL_FILENAME,
+            'type' => 'str',
+            'value' => 'invoice.pdf',
+        ],
     ],
     'events' => [
         'onActivate' => '\FreshAdvance\Invoice\Transition\Core\Events::onActivate',