diff --git a/CHANGELOG.md b/CHANGELOG.md
index 296749e3..935dd617 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 # CHANGELOG
 
+### [v5.4.0 _(Sep 21, 2023)_](https://github.com/omise/omise-woocommerce/releases/tag/v5.4.0)
+- Added OCBC Digital for Singapore PSP. (PR [#401](https://github.com/omise/omise-woocommerce/pull/401))
+
 ### [v5.3.1 _(Sep 05, 2023)_](https://github.com/omise/omise-woocommerce/releases/tag/v5.3.1)
 - Fixed capabilities api calling on every pages. (PR [#398](https://github.com/omise/omise-woocommerce/pull/398))
 
diff --git a/omise-woocommerce.php b/omise-woocommerce.php
index 77a33002..fd1b3df6 100644
--- a/omise-woocommerce.php
+++ b/omise-woocommerce.php
@@ -4,7 +4,7 @@
  * Plugin Name: Opn Payments
  * Plugin URI:  https://www.omise.co/woocommerce
  * Description: Opn Payments is a WordPress plugin designed specifically for WooCommerce. The plugin adds support for Opn Payments Payment Gateway's payment methods to WooCommerce.
- * Version:     5.3.1
+ * Version:     5.4.0
  * Author:      Opn Payments and contributors
  * Author URI:  https://github.com/omise/omise-woocommerce/graphs/contributors
  * Text Domain: omise
@@ -22,7 +22,7 @@ class Omise
 	 *
 	 * @var string
 	 */
-	public $version = '5.3.1';
+	public $version = '5.4.0';
 
 	/**
 	 * The Omise Instance.
diff --git a/readme.txt b/readme.txt
index 625c9574..1f57bf7f 100644
--- a/readme.txt
+++ b/readme.txt
@@ -3,7 +3,7 @@ Contributors: Opn Payments
 Tags: opn payments, payment, payment gateway, woocommerce plugin, omise, opn, installment, internet banking, alipay, paynow, truemoney wallet, woocommerce payment
 Requires at least: 4.3.1
 Tested up to: 6.0.2
-Stable tag: 5.3.1
+Stable tag: 5.4.0
 License: MIT
 License URI: https://opensource.org/licenses/MIT
 
@@ -34,6 +34,10 @@ From there:
 
 == Changelog ==
 
+= 5.4.0 =
+
+- Added OCBC Digital for Singapore PSP. (PR [#401](https://github.com/omise/omise-woocommerce/pull/401))
+
 = 5.3.1 =
 
 - Fixed capabilities api calling on every pages. (PR [#398](https://github.com/omise/omise-woocommerce/pull/398))