diff --git a/CHANGELOG.md b/CHANGELOG.md
index 96805c05..00f4ce4b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 All notable changes to the LaunchDarkly PHP SDK will be documented in this file. This project adheres to [Semantic Versioning](http://semver.org).
 
+## [4.3.0] - 2023-01-31
+### Added:
+- Introduced support for an `application_info` config property which sets application metadata that may be used in LaunchDarkly analytics or other product features. This does not affect feature flag evaluations.
+
 ## [4.2.4] - 2022-10-07
 ### Changed:
 - CI builds now include a cross-platform test suite implemented in https://github.com/launchdarkly/sdk-test-harness. This is in addition to unit test coverage, and ensures consistent behavior across SDKs.
diff --git a/src/LaunchDarkly/LDClient.php b/src/LaunchDarkly/LDClient.php
index afcac8bc..05883e86 100644
--- a/src/LaunchDarkly/LDClient.php
+++ b/src/LaunchDarkly/LDClient.php
@@ -27,7 +27,7 @@ class LDClient
      * The current SDK version.
      * @var string
      */
-    const VERSION = '4.2.4';
+    const VERSION = '4.3.0';
 
     /** @var string */
     protected $_sdkKey;