diff --git a/README.txt b/README.txt
index 69e4718..bdac595 100644
--- a/README.txt
+++ b/README.txt
@@ -69,6 +69,7 @@ Yes. <a href="https://stape.io/blog/how-to-set-up-facebook-conversion-api">How t
 
 = 2.1.24 =
 * Added Order paid completed webhook
+* Added cart_hash key to webhooks
 
 = 2.1.23 =
 * Fix purchase event
diff --git a/includes/class-gtm-server-side-webhook-completed.php b/includes/class-gtm-server-side-webhook-completed.php
index db9ddad..080444e 100644
--- a/includes/class-gtm-server-side-webhook-completed.php
+++ b/includes/class-gtm-server-side-webhook-completed.php
@@ -50,6 +50,7 @@ public function woocommerce_order_status_completed( $order_id ) {
 
 		$request = array(
 			'event'     => 'order_completed',
+			'cart_hash' => $order->get_cart_hash(),
 			'ecommerce' => array(
 				'transaction_id' => esc_attr( $order->get_order_number() ),
 				'affiliation'    => '',
diff --git a/includes/class-gtm-server-side-webhook-processing.php b/includes/class-gtm-server-side-webhook-processing.php
index eed7c17..a64f4b4 100644
--- a/includes/class-gtm-server-side-webhook-processing.php
+++ b/includes/class-gtm-server-side-webhook-processing.php
@@ -50,6 +50,7 @@ public function woocommerce_order_status_processing( $order_id ) {
 
 		$request = array(
 			'event'     => 'order_paid',
+			'cart_hash' => $order->get_cart_hash(),
 			'ecommerce' => array(
 				'transaction_id' => esc_attr( $order->get_order_number() ),
 				'affiliation'    => '',
diff --git a/includes/class-gtm-server-side-webhook-purchase.php b/includes/class-gtm-server-side-webhook-purchase.php
index 2b001d6..23d3af3 100644
--- a/includes/class-gtm-server-side-webhook-purchase.php
+++ b/includes/class-gtm-server-side-webhook-purchase.php
@@ -50,6 +50,7 @@ public function woocommerce_new_order( $order_id, $order ) {
 
 		$request                              = array(
 			'event'     => 'purchase',
+			'cart_hash' => $order->get_cart_hash(),
 			'ecommerce' => array(
 				'transaction_id' => esc_attr( $order->get_order_number() ),
 				'affiliation'    => '',
diff --git a/includes/class-gtm-server-side-webhook-refund.php b/includes/class-gtm-server-side-webhook-refund.php
index d204f26..7af9915 100644
--- a/includes/class-gtm-server-side-webhook-refund.php
+++ b/includes/class-gtm-server-side-webhook-refund.php
@@ -51,6 +51,7 @@ public function woocommerce_order_refunded( $order_id, $refund_id ) {
 
 		$request = array(
 			'event'     => 'refund',
+			'cart_hash' => $order->get_cart_hash(),
 			'ecommerce' => array(
 				'transaction_id' => esc_attr( $order->get_order_number() ),
 				'value'          => GTM_Server_Side_WC_Helpers::instance()->formatted_price( $order->get_total() ),