diff --git a/CHANGELOG.md b/CHANGELOG.md
index 95d105a3..cd03c330 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,30 @@
 # Node.js Agent for Google Cloud Debug ChangeLog
 
+## [4.0.0](https://www.github.com/googleapis/cloud-debug-nodejs/compare/v3.2.0...v4.0.0) (2019-06-05)
+
+
+### ⚠ BREAKING CHANGES
+
+* upgrade engines field to >=8.10.0 (#680)
+
+### Bug Fixes
+
+* **deps:** update dependency @google-cloud/common to v1 ([#692](https://www.github.com/googleapis/cloud-debug-nodejs/issues/692)) ([eeaeac8](https://www.github.com/googleapis/cloud-debug-nodejs/commit/eeaeac8))
+* **deps:** update dependency express to v4.17.0 ([#695](https://www.github.com/googleapis/cloud-debug-nodejs/issues/695)) ([90420bd](https://www.github.com/googleapis/cloud-debug-nodejs/commit/90420bd))
+* **deps:** update dependency express to v4.17.1 ([#708](https://www.github.com/googleapis/cloud-debug-nodejs/issues/708)) ([97bfa7b](https://www.github.com/googleapis/cloud-debug-nodejs/commit/97bfa7b))
+* **deps:** update dependency gcp-metadata to v2 ([#691](https://www.github.com/googleapis/cloud-debug-nodejs/issues/691)) ([3a4b275](https://www.github.com/googleapis/cloud-debug-nodejs/commit/3a4b275))
+
+
+### Build System
+
+* upgrade engines field to >=8.10.0 ([#680](https://www.github.com/googleapis/cloud-debug-nodejs/issues/680)) ([d36462e](https://www.github.com/googleapis/cloud-debug-nodejs/commit/d36462e))
+
+
+### Features
+
+* add `get()` function ([#709](https://www.github.com/googleapis/cloud-debug-nodejs/issues/709)) ([003c662](https://www.github.com/googleapis/cloud-debug-nodejs/commit/003c662))
+* support apiEndpoint override ([#713](https://www.github.com/googleapis/cloud-debug-nodejs/issues/713)) ([dfa349e](https://www.github.com/googleapis/cloud-debug-nodejs/commit/dfa349e))
+
 ## v3.2.0
 
 05-02-2019 08:18 PDT
diff --git a/package.json b/package.json
index 7403842e..316ada63 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@google-cloud/debug-agent",
-  "version": "3.2.0",
+  "version": "4.0.0",
   "author": "Google Inc.",
   "description": "Stackdriver Debug Agent for Node.js",
   "main": "./build/src/index",
diff --git a/samples/package.json b/samples/package.json
index 81c55680..2b11b0ff 100644
--- a/samples/package.json
+++ b/samples/package.json
@@ -14,7 +14,7 @@
     "test": "mocha"
   },
   "dependencies": {
-    "@google-cloud/debug-agent": "^3.2.0",
+    "@google-cloud/debug-agent": "^4.0.0",
     "express": "4.17.1"
   },
   "devDependencies": {