diff --git a/.version b/.version
index 795460f..79127d8 100644
--- a/.version
+++ b/.version
@@ -1 +1 @@
-v1.1.0
+v1.2.0
diff --git a/ChangeLog.md b/ChangeLog.md
index b7592fa..afcee7d 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -8,6 +8,15 @@ Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
 
+## [v1.2.0] - 2026-01-15
+### Added
+- Added SDK info functionality to include SDK metadata in requests
+- Added new metadata to Data API request headers for better tracking and debugging
+- Added data-api-demo.php example to quickstart documentation
+
+### Changed
+- Updated regex for request path handling to support `/latest` and `/latest-lts` prefixes
+
 ## [v1.1.0] - 2025-07-30
 ### Fixed
 - Fixed Quickstart app so that it runs in a Docker container or with a local PHP server