diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6153b9a..c871f14 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,17 @@ This projects adheres to [Semantic Versioning](http://semver.org/) and [Keep a C
 ## [Unreleased][unreleased]
 -
 
+## [4.5.6] - 2023-07-12
+
+### Commits
+
+- Added label for subscription ID merge tag. ([22466f0](https://github.com/pronamic/wp-pronamic-pay-gravityforms/commit/22466f07a111097b45d10933e2cbf38132dc1b34))
+- Added merge tag `{pronamic_subscription_id}`. ([9d25939](https://github.com/pronamic/wp-pronamic-pay-gravityforms/commit/9d25939eb1e31d9aa75eaaa4a99a6ecd16a842be))
+
+Full set of changes: [`4.5.5...4.5.6`][4.5.6]
+
+[4.5.6]: https://github.com/pronamic/wp-pronamic-pay-gravityforms/compare/v4.5.5...v4.5.6
+
 ## [4.5.5] - 2023-06-01
 
 ### Commits
diff --git a/package.json b/package.json
index 93124fd..712af8c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "gravityforms",
-  "version": "4.5.5",
+  "version": "4.5.6",
   "description": "Gravity Forms driver for the WordPress payment processing library.",
   "repository": {
     "type": "git",
diff --git a/pronamic-pay-gravityforms.php b/pronamic-pay-gravityforms.php
index 4f1e08f..5c8dac3 100644
--- a/pronamic-pay-gravityforms.php
+++ b/pronamic-pay-gravityforms.php
@@ -4,7 +4,7 @@
  * Plugin URI: https://www.pronamic.eu/plugins/pronamic-pay-gravityforms/
  * Description: Extend the Pronamic Pay plugin with Gravity Forms support to receive payments through a variety of payment providers.
  *
- * Version: 4.5.5
+ * Version: 4.5.6
  * Requires at least: 4.7
  * Requires PHP: 7.4
  *