diff --git a/CHANGELOG.md b/CHANGELOG.md
index 33dfce9..ac6b9ea 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@ All notable changes will be documented in this file.
 Updates should follow the [Keep a CHANGELOG](http://keepachangelog.com/) principles.
 
 ## [Unreleased]
+- Add `EnvelopeDocument.id`
 - Extend `EnvelopeRecipient` and `EnvelopeTemplateRecipient` resource
 - Add `EnvelopeDocument.createTagsByAutoplacement` endpoint
 - Add `Webhook oAuth properties`
diff --git a/src/Resource/EnvelopeDocument.php b/src/Resource/EnvelopeDocument.php
index 5711c3d..532262a 100644
--- a/src/Resource/EnvelopeDocument.php
+++ b/src/Resource/EnvelopeDocument.php
@@ -11,6 +11,8 @@ class EnvelopeDocument extends BaseResource
 {
     use EntityResourceTrait;
 
+    public string $id;
+
     public string $name;
 
     public ?string $metadata = null;