diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 73257989..fbd9082d 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "1.4.1"
+  ".": "1.5.0"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index f8841075..9219f140 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [1.5.0](https://github.com/googleapis/nodejs-vertexai/compare/v1.4.1...v1.5.0) (2024-08-21)
+
+
+### Features
+
+* missing property frequencyPenalty in type defintions ([#394](https://github.com/googleapis/nodejs-vertexai/issues/394)) ([7557a83](https://github.com/googleapis/nodejs-vertexai/commit/7557a839b96a9fddc17c6516dd9c8c12772b6c59))
+
 ## [1.4.1](https://github.com/googleapis/nodejs-vertexai/compare/v1.4.0...v1.4.1) (2024-08-09)
 
 
diff --git a/package.json b/package.json
index 0a239b71..29ded9ca 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@google-cloud/vertexai",
   "description": "Vertex Generative AI client for Node.js",
-  "version": "1.4.1",
+  "version": "1.5.0",
   "license": "Apache-2.0",
   "author": "Google LLC",
   "engines": {
diff --git a/src/util/constants.ts b/src/util/constants.ts
index 925622e2..62166644 100644
--- a/src/util/constants.ts
+++ b/src/util/constants.ts
@@ -21,7 +21,7 @@ export const USER_ROLE = 'user';
 export const MODEL_ROLE = 'model';
 export const SYSTEM_ROLE = 'system';
 const USER_AGENT_PRODUCT = 'model-builder';
-const CLIENT_LIBRARY_VERSION = '1.4.1'; // x-release-please-version
+const CLIENT_LIBRARY_VERSION = '1.5.0'; // x-release-please-version
 const CLIENT_LIBRARY_LANGUAGE = `grpc-node/${CLIENT_LIBRARY_VERSION}`;
 export const USER_AGENT = `${USER_AGENT_PRODUCT}/${CLIENT_LIBRARY_VERSION} ${CLIENT_LIBRARY_LANGUAGE}`;
 export const CREDENTIAL_ERROR_MESSAGE =