diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2c6055c..2564806 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,9 @@
 
 All notable changes to this project will be documented in this file.
 
+## [1.9.0] - 2023-11-07
+- Add `partnerUserId` parameter
+
 ## [1.8.0] - 2023-10-12
 - Add support for Aggregator API parameters
 - Remove old SupportedBlockchains type
diff --git a/package.json b/package.json
index c15b590..a1257c5 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@coinbase/cbpay-js",
-  "version": "1.8.0",
+  "version": "1.9.0",
   "license": "MIT",
   "main": "dist/index.js",
   "module": "dist/index.mjs",