diff --git a/packages/google-cloud-servicedirectory/CHANGELOG.md b/packages/google-cloud-servicedirectory/CHANGELOG.md
index 09039439b8f..8aa8f889708 100644
--- a/packages/google-cloud-servicedirectory/CHANGELOG.md
+++ b/packages/google-cloud-servicedirectory/CHANGELOG.md
@@ -1,5 +1,16 @@
 # Changelog
 
+## [4.0.0](https://github.com/googleapis/nodejs-service-directory/compare/v3.4.0...v4.0.0) (2022-05-20)
+
+
+### ⚠ BREAKING CHANGES
+
+* update library to use Node 12 (#229)
+
+### Build System
+
+* update library to use Node 12 ([#229](https://github.com/googleapis/nodejs-service-directory/issues/229)) ([34d5709](https://github.com/googleapis/nodejs-service-directory/commit/34d5709ab1e6e6c51bd2443b674fc22634214e61))
+
 ## [3.4.0](https://github.com/googleapis/nodejs-service-directory/compare/v3.3.2...v3.4.0) (2022-04-11)
 
 
diff --git a/packages/google-cloud-servicedirectory/package.json b/packages/google-cloud-servicedirectory/package.json
index 0912e86ce3a..7ca01d18dbd 100644
--- a/packages/google-cloud-servicedirectory/package.json
+++ b/packages/google-cloud-servicedirectory/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@google-cloud/service-directory",
-  "version": "3.4.0",
+  "version": "4.0.0",
   "description": "Servicedirectory client for Node.js",
   "repository": "googleapis/nodejs-service-directory",
   "license": "Apache-2.0",
diff --git a/packages/google-cloud-servicedirectory/samples/generated/v1/snippet_metadata.google.cloud.servicedirectory.v1.json b/packages/google-cloud-servicedirectory/samples/generated/v1/snippet_metadata.google.cloud.servicedirectory.v1.json
index 9747621a607..11054af591a 100644
--- a/packages/google-cloud-servicedirectory/samples/generated/v1/snippet_metadata.google.cloud.servicedirectory.v1.json
+++ b/packages/google-cloud-servicedirectory/samples/generated/v1/snippet_metadata.google.cloud.servicedirectory.v1.json
@@ -1,7 +1,7 @@
 {
     "clientLibrary": {
         "name": "nodejs-servicedirectory",
-        "version": "3.4.0",
+        "version": "4.0.0",
         "language": "TYPESCRIPT",
         "apis": [
             {
diff --git a/packages/google-cloud-servicedirectory/samples/generated/v1beta1/snippet_metadata.google.cloud.servicedirectory.v1beta1.json b/packages/google-cloud-servicedirectory/samples/generated/v1beta1/snippet_metadata.google.cloud.servicedirectory.v1beta1.json
index 917b09299b7..f3112a7fd5c 100644
--- a/packages/google-cloud-servicedirectory/samples/generated/v1beta1/snippet_metadata.google.cloud.servicedirectory.v1beta1.json
+++ b/packages/google-cloud-servicedirectory/samples/generated/v1beta1/snippet_metadata.google.cloud.servicedirectory.v1beta1.json
@@ -1,7 +1,7 @@
 {
     "clientLibrary": {
         "name": "nodejs-servicedirectory",
-        "version": "3.4.0",
+        "version": "4.0.0",
         "language": "TYPESCRIPT",
         "apis": [
             {
diff --git a/packages/google-cloud-servicedirectory/samples/package.json b/packages/google-cloud-servicedirectory/samples/package.json
index b977cfce376..b3097e14c36 100644
--- a/packages/google-cloud-servicedirectory/samples/package.json
+++ b/packages/google-cloud-servicedirectory/samples/package.json
@@ -13,7 +13,7 @@
     "test": "c8 mocha --timeout 600000 test/*.js"
   },
   "dependencies": {
-    "@google-cloud/service-directory": "^3.4.0",
+    "@google-cloud/service-directory": "^4.0.0",
     "eslint": "^7.0.0",
     "json-schema": "^0.4.0",
     "uuid": "^8.0.0"