diff --git a/docs/Webhooks.md b/docs/Webhooks.md
index 195ce8d..2fff630 100644
--- a/docs/Webhooks.md
+++ b/docs/Webhooks.md
@@ -37,6 +37,8 @@ Every delivery carries a [`WebhookEvent`](../src/API/Resources/WebhookEvent.php)
 | `entityType` | `string` | Type of the related resource (e.g. `order`, `refund`, `subscription`). |
 | `entityId` | `string` | ID of the related resource (e.g. `order_Hn5xWqVfKm8RjTgYbUcP`). |
 | `object` | `object\|null` | The full resource payload at the time of the event. Shape depends on `entityType`. |
+| `createdAt` | `string` | When the event occurred (ISO 8601). |
+| `testmode` | `bool` | Whether this event was generated in test mode. |
 | `links` | `object` | HATEOAS links — `links.self.href` points to this webhook event. |
 
 ### Example payload
@@ -54,6 +56,8 @@ Every delivery carries a [`WebhookEvent`](../src/API/Resources/WebhookEvent.php)
         "status": "paid",
         "total": { "value": "29.99", "currency": "EUR" }
     },
+    "createdAt": "2026-01-11T10:50:50+02:00",
+    "testmode": true,
     "links": {
         "self": {
             "href": "https://api.vatly.com/v1/webhook-events/webhook_event_Qk8pRtSvWm2NjLhYcZaE",
diff --git a/src/API/Resources/WebhookEvent.php b/src/API/Resources/WebhookEvent.php
index 3dee113..83380d5 100644
--- a/src/API/Resources/WebhookEvent.php
+++ b/src/API/Resources/WebhookEvent.php
@@ -47,5 +47,12 @@ class WebhookEvent extends BaseResource
      */
     public $object = null;
 
+    /**
+     * @example 2023-08-11T10:48:51+02:00
+     */
+    public string $createdAt;
+
+    public bool $testmode;
+
     public WebhookEventLinks $links;
 }
diff --git a/src/API/Webhooks/Webhook.php b/src/API/Webhooks/Webhook.php
index 1205266..c6f274f 100644
--- a/src/API/Webhooks/Webhook.php
+++ b/src/API/Webhooks/Webhook.php
@@ -35,7 +35,7 @@ public static function parse(string $payload, string $signature, string $secret)
             );
         }
 
-        foreach (['id', 'resource', 'eventName', 'entityType', 'entityId'] as $field) {
+        foreach (['id', 'resource', 'eventName', 'entityType', 'entityId', 'createdAt', 'testmode'] as $field) {
             if (! isset($decoded->{$field})) {
                 throw new \InvalidArgumentException(
                     "Webhook payload is missing required field: {$field}"
@@ -56,6 +56,8 @@ public static function parse(string $payload, string $signature, string $secret)
             $decoded->eventName,
             $decoded->entityType,
             $decoded->entityId,
+            $decoded->testmode,
+            $decoded->createdAt,
             $object,
         );
     }
diff --git a/src/API/Webhooks/WebhookPayload.php b/src/API/Webhooks/WebhookPayload.php
index 977aa82..108a6d0 100644
--- a/src/API/Webhooks/WebhookPayload.php
+++ b/src/API/Webhooks/WebhookPayload.php
@@ -54,12 +54,21 @@ class WebhookPayload
      */
     public ?object $object;
 
+    /**
+     * @example 2023-08-11T10:48:51+02:00
+     */
+    public string $createdAt;
+
+    public bool $testmode;
+
     public function __construct(
         string $id,
         string $resource,
         string $eventName,
         string $entityType,
         string $entityId,
+        bool $testmode,
+        string $createdAt,
         ?object $object = null,
     ) {
         $this->id = $id;
@@ -68,5 +77,7 @@ public function __construct(
         $this->entityType = $entityType;
         $this->entityId = $entityId;
         $this->object = $object;
+        $this->testmode = $testmode;
+        $this->createdAt = $createdAt;
     }
 }
diff --git a/tests/Webhooks/WebhookTest.php b/tests/Webhooks/WebhookTest.php
index 1ecb615..ee7138f 100644
--- a/tests/Webhooks/WebhookTest.php
+++ b/tests/Webhooks/WebhookTest.php
@@ -23,6 +23,8 @@ private function makePayload(array $overrides = []): string
             'entityType' => 'order',
             'entityId' => 'order_Hn5xWqVfKm8RjTgYbUcP',
             'object' => ['id' => 'order_Hn5xWqVfKm8RjTgYbUcP', 'resource' => 'order'],
+            'createdAt' => '2023-01-11T10:50:50+02:00',
+            'testmode' => true,
         ], $overrides);
 
         return json_encode($data);
@@ -52,6 +54,9 @@ public function test_it_parses_a_valid_webhook(): void
         $this->assertSame('order_Hn5xWqVfKm8RjTgYbUcP', $event->entityId);
         $this->assertIsObject($event->object);
         $this->assertSame('order_Hn5xWqVfKm8RjTgYbUcP', $event->object->id);
+        $this->assertSame('order', $event->object->resource);
+        $this->assertTrue($event->testmode);
+        $this->assertSame('2023-01-11T10:50:50+02:00', $event->createdAt);
     }
 
     public function test_it_parses_a_webhook_without_object(): void
@@ -62,6 +67,8 @@ public function test_it_parses_a_webhook_without_object(): void
             'eventName' => 'order.paid',
             'entityType' => 'order',
             'entityId' => 'order_Hn5xWqVfKm8RjTgYbUcP',
+            'createdAt' => '2023-01-11T10:50:50+02:00',
+            'testmode' => true,
         ];
         $payload = json_encode($data);
         $signature = $this->sign($payload);