diff --git a/CHANGELOG.md b/CHANGELOG.md
index d41b4579..af12d56a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,18 @@
 # Changelog
 
+## [2.12.0](https://www.github.com/googleapis/nodejs-dialogflow-cx/compare/v2.11.0...v2.12.0) (2021-06-30)
+
+
+### Features
+
+* mark agent.default_language_code as required feat: add return_partial response to Fulfillment docs: add notes to train agent before sending queries ([#140](https://www.github.com/googleapis/nodejs-dialogflow-cx/issues/140)) ([eae8f44](https://www.github.com/googleapis/nodejs-dialogflow-cx/commit/eae8f4409cf5832c5fd28e2e676847a4722997b9))
+
+
+### Bug Fixes
+
+* **deps:** google-gax v2.17.0 with mTLS ([#145](https://www.github.com/googleapis/nodejs-dialogflow-cx/issues/145)) ([d5f2918](https://www.github.com/googleapis/nodejs-dialogflow-cx/commit/d5f291886d1418ad43684d3db7b0a2d12cd8c219))
+* make request optional in all cases ([#139](https://www.github.com/googleapis/nodejs-dialogflow-cx/issues/139)) ([ad950f0](https://www.github.com/googleapis/nodejs-dialogflow-cx/commit/ad950f057f413b9c094b6d23a21ada0d64887206))
+
 ## [2.11.0](https://www.github.com/googleapis/nodejs-dialogflow-cx/compare/v2.10.0...v2.11.0) (2021-06-21)
 
 
diff --git a/package.json b/package.json
index 64348bc3..59168ace 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@google-cloud/dialogflow-cx",
-  "version": "2.11.0",
+  "version": "2.12.0",
   "description": "Cx client for Node.js",
   "repository": "googleapis/nodejs-dialogflow-cx",
   "license": "Apache-2.0",
diff --git a/samples/package.json b/samples/package.json
index 01bb5a16..6527cafb 100644
--- a/samples/package.json
+++ b/samples/package.json
@@ -13,7 +13,7 @@
     "test": "c8 mocha --timeout 600000 test/*.js"
   },
   "dependencies": {
-    "@google-cloud/dialogflow-cx": "^2.11.0",
+    "@google-cloud/dialogflow-cx": "^2.12.0",
     "uuid": "^8.3.1"
   },
   "devDependencies": {