diff --git a/.github/.OwlBot.lock.yaml b/.github/.OwlBot.lock.yaml
index 24943e11..51868547 100644
--- a/.github/.OwlBot.lock.yaml
+++ b/.github/.OwlBot.lock.yaml
@@ -13,5 +13,5 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-nodejs:latest
-  digest: sha256:609822e3c09b7a1bd90b99655904609f162cc15acb4704f1edf778284c36f429
-# created: 2024-10-01T19:34:30.797530443Z
+  digest: sha256:bd8b41503cfcbd21f121e4b197d0f8bf1447f3499921f18441bb7e6e3ae8f7fa
+# created: 2024-10-10T00:00:00.00000000Z
diff --git a/.github/sync-repo-settings.yaml b/.github/sync-repo-settings.yaml
index b46e4c4d..a013376d 100644
--- a/.github/sync-repo-settings.yaml
+++ b/.github/sync-repo-settings.yaml
@@ -8,9 +8,9 @@ branchProtectionRules:
       - "ci/kokoro: Samples test"
       - "ci/kokoro: System test"
       - lint
-      - test (14)
-      - test (16)
       - test (18)
+      - test (20)
+      - test (22)
       - cla/google
       - windows
       - OwlBot Post Processor
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 4892eb2c..791891a0 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -9,10 +9,10 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [14, 16, 18, 20]
+        node: [18, 20, 22]
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-node@v3
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node }}
       - run: node --version
@@ -29,10 +29,10 @@ jobs:
   windows:
     runs-on: windows-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-node@v3
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
         with:
-          node-version: 14
+          node-version: 18
       - run: npm install --engine-strict
       - run: npm test
         env:
@@ -40,19 +40,19 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-node@v3
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
         with:
-          node-version: 14
+          node-version: 18
       - run: npm install
       - run: npm run lint
   docs:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-node@v3
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
         with:
-          node-version: 14
+          node-version: 18
       - run: npm install
       - run: npm run docs
       - uses: JustinBeckwith/linkinator-action@v1
diff --git a/.kokoro/browser-test.sh b/.kokoro/browser-test.sh
index d881d4c1..f8ca0f45 100755
--- a/.kokoro/browser-test.sh
+++ b/.kokoro/browser-test.sh
@@ -16,8 +16,6 @@
 
 set -eo pipefail
 
-export NPM_CONFIG_PREFIX=/home/node/.npm-global
-
 # Setup service account credentials.
 export GOOGLE_APPLICATION_CREDENTIALS=${KOKORO_GFILE_DIR}/service-account.json
 export GCLOUD_PROJECT=long-door-651
diff --git a/.kokoro/common.cfg b/.kokoro/common.cfg
index 5be3d47c..f3d02615 100644
--- a/.kokoro/common.cfg
+++ b/.kokoro/common.cfg
@@ -16,7 +16,7 @@ build_file: "gaxios/.kokoro/trampoline_v2.sh"
 # Configure the docker image for kokoro-trampoline.
 env_vars: {
     key: "TRAMPOLINE_IMAGE"
-    value: "gcr.io/cloud-devrel-kokoro-resources/node:14-user"
+    value: "gcr.io/cloud-devrel-kokoro-resources/node:18-user"
 }
 env_vars: {
     key: "TRAMPOLINE_BUILD_FILE"
diff --git a/.kokoro/continuous/node14/common.cfg b/.kokoro/continuous/node18/common.cfg
similarity index 89%
rename from .kokoro/continuous/node14/common.cfg
rename to .kokoro/continuous/node18/common.cfg
index 5be3d47c..f3d02615 100644
--- a/.kokoro/continuous/node14/common.cfg
+++ b/.kokoro/continuous/node18/common.cfg
@@ -16,7 +16,7 @@ build_file: "gaxios/.kokoro/trampoline_v2.sh"
 # Configure the docker image for kokoro-trampoline.
 env_vars: {
     key: "TRAMPOLINE_IMAGE"
-    value: "gcr.io/cloud-devrel-kokoro-resources/node:14-user"
+    value: "gcr.io/cloud-devrel-kokoro-resources/node:18-user"
 }
 env_vars: {
     key: "TRAMPOLINE_BUILD_FILE"
diff --git a/.kokoro/continuous/node14/lint.cfg b/.kokoro/continuous/node18/lint.cfg
similarity index 100%
rename from .kokoro/continuous/node14/lint.cfg
rename to .kokoro/continuous/node18/lint.cfg
diff --git a/.kokoro/continuous/node14/samples-test.cfg b/.kokoro/continuous/node18/samples-test.cfg
similarity index 100%
rename from .kokoro/continuous/node14/samples-test.cfg
rename to .kokoro/continuous/node18/samples-test.cfg
diff --git a/.kokoro/continuous/node14/system-test.cfg b/.kokoro/continuous/node18/system-test.cfg
similarity index 100%
rename from .kokoro/continuous/node14/system-test.cfg
rename to .kokoro/continuous/node18/system-test.cfg
diff --git a/.kokoro/continuous/node14/test.cfg b/.kokoro/continuous/node18/test.cfg
similarity index 100%
rename from .kokoro/continuous/node14/test.cfg
rename to .kokoro/continuous/node18/test.cfg
diff --git a/.kokoro/pre-samples-test.sh b/.kokoro/pre-samples-test.sh
new file mode 100644
index 00000000..e104e8ff
--- /dev/null
+++ b/.kokoro/pre-samples-test.sh
@@ -0,0 +1 @@
+npm i -g npm@10
diff --git a/.kokoro/presubmit/node14/common.cfg b/.kokoro/presubmit/node18/common.cfg
similarity index 89%
rename from .kokoro/presubmit/node14/common.cfg
rename to .kokoro/presubmit/node18/common.cfg
index 5be3d47c..f3d02615 100644
--- a/.kokoro/presubmit/node14/common.cfg
+++ b/.kokoro/presubmit/node18/common.cfg
@@ -16,7 +16,7 @@ build_file: "gaxios/.kokoro/trampoline_v2.sh"
 # Configure the docker image for kokoro-trampoline.
 env_vars: {
     key: "TRAMPOLINE_IMAGE"
-    value: "gcr.io/cloud-devrel-kokoro-resources/node:14-user"
+    value: "gcr.io/cloud-devrel-kokoro-resources/node:18-user"
 }
 env_vars: {
     key: "TRAMPOLINE_BUILD_FILE"
diff --git a/.kokoro/presubmit/node14/samples-test.cfg b/.kokoro/presubmit/node18/samples-test.cfg
similarity index 100%
rename from .kokoro/presubmit/node14/samples-test.cfg
rename to .kokoro/presubmit/node18/samples-test.cfg
diff --git a/.kokoro/presubmit/node14/system-test.cfg b/.kokoro/presubmit/node18/system-test.cfg
similarity index 100%
rename from .kokoro/presubmit/node14/system-test.cfg
rename to .kokoro/presubmit/node18/system-test.cfg
diff --git a/.kokoro/presubmit/node14/test.cfg b/.kokoro/presubmit/node18/test.cfg
similarity index 100%
rename from .kokoro/presubmit/node14/test.cfg
rename to .kokoro/presubmit/node18/test.cfg
diff --git a/.kokoro/release/docs-devsite.cfg b/.kokoro/release/docs-devsite.cfg
index 7e8ddaaf..a5793104 100644
--- a/.kokoro/release/docs-devsite.cfg
+++ b/.kokoro/release/docs-devsite.cfg
@@ -11,7 +11,7 @@ before_action {
 # doc publications use a Python image.
 env_vars: {
     key: "TRAMPOLINE_IMAGE"
-    value: "gcr.io/cloud-devrel-kokoro-resources/node:14-user"
+    value: "gcr.io/cloud-devrel-kokoro-resources/node:18-user"
 }
 
 # Download trampoline resources.
diff --git a/.kokoro/release/docs.cfg b/.kokoro/release/docs.cfg
index c132e0e7..434d1f77 100644
--- a/.kokoro/release/docs.cfg
+++ b/.kokoro/release/docs.cfg
@@ -11,7 +11,7 @@ before_action {
 # doc publications use a Python image.
 env_vars: {
     key: "TRAMPOLINE_IMAGE"
-    value: "gcr.io/cloud-devrel-kokoro-resources/node:14-user"
+    value: "gcr.io/cloud-devrel-kokoro-resources/node:18-user"
 }
 
 # Download trampoline resources.
diff --git a/.kokoro/release/docs.sh b/.kokoro/release/docs.sh
index 1d8f3f49..e9079a60 100755
--- a/.kokoro/release/docs.sh
+++ b/.kokoro/release/docs.sh
@@ -16,7 +16,7 @@
 
 set -eo pipefail
 
-# build jsdocs (Python is installed on the Node 10 docker image).
+# build jsdocs (Python is installed on the Node 18 docker image).
 if [[ -z "$CREDENTIALS" ]]; then
   # if CREDENTIALS are explicitly set, assume we're testing locally
   # and don't set NPM_CONFIG_PREFIX.
diff --git a/.kokoro/release/publish.cfg b/.kokoro/release/publish.cfg
index 19898330..7e6da42b 100644
--- a/.kokoro/release/publish.cfg
+++ b/.kokoro/release/publish.cfg
@@ -30,7 +30,7 @@ build_file: "gaxios/.kokoro/trampoline_v2.sh"
 # Configure the docker image for kokoro-trampoline.
 env_vars: {
     key: "TRAMPOLINE_IMAGE"
-    value: "gcr.io/cloud-devrel-kokoro-resources/node:14-user"
+    value: "gcr.io/cloud-devrel-kokoro-resources/node:18-user"
 }
 
 env_vars: {
diff --git a/.kokoro/samples-test.sh b/.kokoro/samples-test.sh
index 8c5d108c..c1cb0fc7 100755
--- a/.kokoro/samples-test.sh
+++ b/.kokoro/samples-test.sh
@@ -56,7 +56,7 @@ fi
 
 # codecov combines coverage across integration and unit tests. Include
 # the logic below for any environment you wish to collect coverage for:
-COVERAGE_NODE=14
+COVERAGE_NODE=18
 if npx check-node-version@3.3.0 --silent --node $COVERAGE_NODE; then
   NYC_BIN=./node_modules/nyc/bin/nyc.js
   if [ -f "$NYC_BIN" ]; then
diff --git a/.kokoro/system-test.sh b/.kokoro/system-test.sh
index 0b3043d2..a90d5cfe 100755
--- a/.kokoro/system-test.sh
+++ b/.kokoro/system-test.sh
@@ -49,7 +49,7 @@ npm run system-test
 
 # codecov combines coverage across integration and unit tests. Include
 # the logic below for any environment you wish to collect coverage for:
-COVERAGE_NODE=14
+COVERAGE_NODE=18
 if npx check-node-version@3.3.0 --silent --node $COVERAGE_NODE; then
   NYC_BIN=./node_modules/nyc/bin/nyc.js
   if [ -f "$NYC_BIN" ]; then
diff --git a/.kokoro/test.bat b/.kokoro/test.bat
index 0bb12405..caf82565 100644
--- a/.kokoro/test.bat
+++ b/.kokoro/test.bat
@@ -21,7 +21,7 @@ cd ..
 @rem we upgrade Node.js in the image:
 SET PATH=%PATH%;/cygdrive/c/Program Files/nodejs/npm
 
-call nvm use v14.17.3
+call nvm use 18
 call which node
 
 call npm install || goto :error
diff --git a/.kokoro/test.sh b/.kokoro/test.sh
index 862d478d..0d9f6392 100755
--- a/.kokoro/test.sh
+++ b/.kokoro/test.sh
@@ -39,7 +39,7 @@ npm test
 
 # codecov combines coverage across integration and unit tests. Include
 # the logic below for any environment you wish to collect coverage for:
-COVERAGE_NODE=14
+COVERAGE_NODE=18
 if npx check-node-version@3.3.0 --silent --node $COVERAGE_NODE; then
   NYC_BIN=./node_modules/nyc/bin/nyc.js
   if [ -f "$NYC_BIN" ]; then
diff --git a/.kokoro/trampoline_v2.sh b/.kokoro/trampoline_v2.sh
index 4d031121..5d6cfcca 100755
--- a/.kokoro/trampoline_v2.sh
+++ b/.kokoro/trampoline_v2.sh
@@ -44,7 +44,7 @@
 # the project root.
 #
 # Here is an example for running this script.
-#   TRAMPOLINE_IMAGE=gcr.io/cloud-devrel-kokoro-resources/node:10-user \
+#   TRAMPOLINE_IMAGE=gcr.io/cloud-devrel-kokoro-resources/node:18-user \
 #     TRAMPOLINE_BUILD_FILE=.kokoro/system-test.sh \
 #     .kokoro/trampoline_v2.sh
 
diff --git a/package.json b/package.json
index b4097f55..b2452e43 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,7 @@
     "google"
   ],
   "engines": {
-    "node": ">=14"
+    "node": ">=18"
   },
   "author": "Google, LLC",
   "license": "Apache-2.0",