diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5c7e5088..257f95c0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,18 @@
 # Changelog
 
+## [1.9.0](https://github.com/googleapis/nodejs-vertexai/compare/v1.9.0...v1.9.0) (2024-10-16)
+
+
+### Bug Fixes
+
+* Add Context Cache support for ChatSessionPreview class ([#433](https://github.com/googleapis/nodejs-vertexai/issues/433)) ([df6f040](https://github.com/googleapis/nodejs-vertexai/commit/df6f0406fbaa72cd64a8f51015e51fee88518db8))
+* Add Context Cache support for ChatSessionPreview class ([#433](https://github.com/googleapis/nodejs-vertexai/issues/433)) ([a3beab1](https://github.com/googleapis/nodejs-vertexai/commit/a3beab1f30540749fbeba40a13327ea078dbed69))
+
+
+### Documentation
+
+* update README ([a052132](https://github.com/googleapis/nodejs-vertexai/commit/a052132b91bad5ee9a42c6fe2057afceab36b542))
+
 ## [1.9.0](https://github.com/googleapis/nodejs-vertexai/compare/v1.8.1...v1.9.0) (2024-10-14)