diff --git a/.github/publish.yml b/.github/publish.yml
deleted file mode 100644
index e69de29..0000000
diff --git a/.kokoro/continuous/node10/lint.cfg b/.kokoro/continuous/node12/lint.cfg
similarity index 100%
rename from .kokoro/continuous/node10/lint.cfg
rename to .kokoro/continuous/node12/lint.cfg
diff --git a/.kokoro/continuous/node10/samples-test.cfg b/.kokoro/continuous/node12/samples-test.cfg
similarity index 100%
rename from .kokoro/continuous/node10/samples-test.cfg
rename to .kokoro/continuous/node12/samples-test.cfg
diff --git a/.kokoro/continuous/node10/system-test.cfg b/.kokoro/continuous/node12/system-test.cfg
similarity index 100%
rename from .kokoro/continuous/node10/system-test.cfg
rename to .kokoro/continuous/node12/system-test.cfg
diff --git a/.kokoro/presubmit/node10/samples-test.cfg b/.kokoro/presubmit/node12/samples-test.cfg
similarity index 100%
rename from .kokoro/presubmit/node10/samples-test.cfg
rename to .kokoro/presubmit/node12/samples-test.cfg
diff --git a/.kokoro/presubmit/node10/system-test.cfg b/.kokoro/presubmit/node12/system-test.cfg
similarity index 100%
rename from .kokoro/presubmit/node10/system-test.cfg
rename to .kokoro/presubmit/node12/system-test.cfg
diff --git a/.kokoro/release/docs-devsite.sh b/.kokoro/release/docs-devsite.sh
index 3b93137..fa089cf 100755
--- a/.kokoro/release/docs-devsite.sh
+++ b/.kokoro/release/docs-devsite.sh
@@ -36,6 +36,11 @@ NAME=$(cat .repo-metadata.json | json name)
 
 mkdir ./_devsite
 cp ./yaml/$NAME/* ./_devsite
+
+# Delete SharePoint item, see https://github.com/microsoft/rushstack/issues/1229
+sed -i -e '1,3d' ./yaml/toc.yml
+sed -i -e 's/^    //' ./yaml/toc.yml
+
 cp ./yaml/toc.yml ./_devsite/toc.yml
 
 # create docs.metadata, based on package.json and .repo-metadata.json.
diff --git a/.kokoro/release/publish.cfg b/.kokoro/release/publish.cfg
index d4600c6..37f07b6 100644
--- a/.kokoro/release/publish.cfg
+++ b/.kokoro/release/publish.cfg
@@ -49,7 +49,7 @@ before_action {
 
 env_vars: {
   key: "SECRET_MANAGER_KEYS"
-  value: "npm_publish_token"
+  value: "npm_publish_token,releasetool-publish-reporter-app,releasetool-publish-reporter-googleapis-installation,releasetool-publish-reporter-pem"
 }
 
 # Download trampoline resources.
@@ -61,7 +61,7 @@ build_file: "github-repo-automation/.kokoro/trampoline.sh"
 # Configure the docker image for kokoro-trampoline.
 env_vars: {
     key: "TRAMPOLINE_IMAGE"
-    value: "gcr.io/cloud-devrel-kokoro-resources/node:8-user"
+    value: "gcr.io/cloud-devrel-kokoro-resources/node:12-user"
 }
 
 env_vars: {
diff --git a/.kokoro/samples-test.sh b/.kokoro/samples-test.sh
index 86e83c9..c0c4013 100755
--- a/.kokoro/samples-test.sh
+++ b/.kokoro/samples-test.sh
@@ -41,7 +41,7 @@ if [ -f samples/package.json ]; then
     cd ..
     # If tests are running against master, configure Build Cop
     # to open issues on failures:
-    if [[ $KOKORO_BUILD_ARTIFACTS_SUBDIR = *"continuous"* ]]; then
+    if [[ $KOKORO_BUILD_ARTIFACTS_SUBDIR = *"continuous"* ]] || [[ $KOKORO_BUILD_ARTIFACTS_SUBDIR = *"nightly"* ]]; then
       export MOCHA_REPORTER_OUTPUT=test_output_sponge_log.xml
       export MOCHA_REPORTER=xunit
       cleanup() {
diff --git a/.kokoro/system-test.sh b/.kokoro/system-test.sh
index dfae142..283f170 100755
--- a/.kokoro/system-test.sh
+++ b/.kokoro/system-test.sh
@@ -35,7 +35,7 @@ npm install
 
 # If tests are running against master, configure Build Cop
 # to open issues on failures:
-if [[ $KOKORO_BUILD_ARTIFACTS_SUBDIR = *"continuous"* ]]; then
+if [[ $KOKORO_BUILD_ARTIFACTS_SUBDIR = *"continuous"* ]] || [[ $KOKORO_BUILD_ARTIFACTS_SUBDIR = *"nightly"* ]]; then
   export MOCHA_REPORTER_OUTPUT=test_output_sponge_log.xml
   export MOCHA_REPORTER=xunit
   cleanup() {
diff --git a/.kokoro/test.sh b/.kokoro/test.sh
index 8d9c295..47be59b 100755
--- a/.kokoro/test.sh
+++ b/.kokoro/test.sh
@@ -23,7 +23,7 @@ cd $(dirname $0)/..
 npm install
 # If tests are running against master, configure Build Cop
 # to open issues on failures:
-if [[ $KOKORO_BUILD_ARTIFACTS_SUBDIR = *"continuous"* ]]; then
+if [[ $KOKORO_BUILD_ARTIFACTS_SUBDIR = *"continuous"* ]] || [[ $KOKORO_BUILD_ARTIFACTS_SUBDIR = *"nightly"* ]]; then
   export MOCHA_REPORTER_OUTPUT=test_output_sponge_log.xml
   export MOCHA_REPORTER=xunit
   cleanup() {
diff --git a/CHANGELOG.md b/CHANGELOG.md
index b6f4802..5124780 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,13 @@
 
 [1]: https://www.npmjs.com/package/@google/repo?activeTab=versions
 
+## [4.2.0](https://www.github.com/googleapis/github-repo-automation/compare/v4.1.0...v4.2.0) (2020-08-28)
+
+
+### Features
+
+* add functionality to remove labels ([#454](https://www.github.com/googleapis/github-repo-automation/issues/454)) ([2cb06b7](https://www.github.com/googleapis/github-repo-automation/commit/2cb06b7174e89aea6d4bbecac7638990afd97c16))
+
 ## [4.1.0](https://www.github.com/googleapis/github-repo-automation/compare/v4.0.2...v4.1.0) (2020-08-11)
 
 
diff --git a/package.json b/package.json
index 4c425de..411fa57 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@google/repo",
-  "version": "4.1.0",
+  "version": "4.2.0",
   "repository": "googleapis/github-repo-automation",
   "description": "A tool for automating multiple GitHub repositories.",
   "engines": {
diff --git a/samples/package.json b/samples/package.json
index cb437ba..5414a1f 100644
--- a/samples/package.json
+++ b/samples/package.json
@@ -14,7 +14,7 @@
     "test": "mocha system-test"
   },
   "dependencies": {
-    "@google/repo": "^4.1.0"
+    "@google/repo": "^4.2.0"
   },
   "devDependencies": {
     "mocha": "^8.0.0"
diff --git a/src/cli.ts b/src/cli.ts
index fbe5c87..344f506 100644
--- a/src/cli.ts
+++ b/src/cli.ts
@@ -27,6 +27,7 @@ import {sync, exec} from './sync';
 import * as meow from 'meow';
 import * as updateNotifier from 'update-notifier';
 import {tag} from './tag-prs';
+import {untag} from './untag-prs';
 /* eslint-disable @typescript-eslint/no-var-requires */
 const pkg = require('../../package.json');
 
@@ -81,6 +82,7 @@ const cli = meow(
     $ repo reject [--branch branch] [--author author] [--title title]
     $ repo rename [--branch branch] [--author author] [--title title] 'new PR title'
     $ repo tag [--branch branch] [--author author] [--title title] label1 label2 ...
+    $ repo untag [--branch branch] [--author author] [--title title] label1
     $ repo apply --branch branch --message message --comment comment [--reviewers username[,username...]] [--silent] command
     $ repo check
     $ repo sync
@@ -120,6 +122,9 @@ switch (cli.input[0]) {
   case 'apply':
     p = apply(cli);
     break;
+  case 'untag':
+    p = untag(cli);
+    break;
   case 'tag':
     p = tag(cli);
     break;
diff --git a/src/lib/github.ts b/src/lib/github.ts
index 354129d..e5be43b 100644
--- a/src/lib/github.ts
+++ b/src/lib/github.ts
@@ -503,6 +503,24 @@ export class GitHubRepository {
     return result.data;
   }
 
+  /**
+   * Removes label with a given name to a given pull request.
+   * @param {Object} pr Pull request object, as returned by GitHib API.
+   * @param {Array<string>} labels Labels to apply to the PR
+   * @returns A list of labels that was added to the issue..
+   */
+  async unTagPullRequest(pr: PullRequest, name: string) {
+    const owner = this.repository.owner.login;
+    const repo = this.repository.name;
+    const url = `/repos/${owner}/${repo}/issues/${pr.number}/labels/${name}`;
+    const result = await this.client.request({
+      url,
+      method: 'DELETE',
+      data: {name},
+    });
+    return result.data;
+  }
+
   /**
    * Closes the given pull request without merging it.
    * @param {Object} pr Pull request object, as returned by GitHub API.
diff --git a/src/untag-prs.ts b/src/untag-prs.ts
new file mode 100644
index 0000000..bcb7745
--- /dev/null
+++ b/src/untag-prs.ts
@@ -0,0 +1,46 @@
+// Copyright 2018 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import * as meow from 'meow';
+import {meowFlags} from './cli';
+
+import {GitHubRepository, PullRequest} from './lib/github';
+import {processPRs} from './lib/asyncItemIterator';
+
+let name: string;
+
+async function processMethod(repository: GitHubRepository, pr: PullRequest) {
+  try {
+    await repository.unTagPullRequest(pr, name);
+  } catch (err) {
+    console.warn(
+      `    error trying to untag PR ${pr.html_url}:`,
+      err.toString()
+    );
+    return false;
+  }
+  return true;
+}
+
+export async function untag(cli: meow.Result<typeof meowFlags>) {
+  name = cli.input[1];
+  return processPRs(cli, {
+    commandName: 'untag',
+    commandActive: 'untagging',
+    commandNamePastTense: 'untagged',
+    commandDesc:
+      'Will remove label(s) to all open PRs with title matching regex.',
+    processMethod,
+  });
+}
diff --git a/synth.metadata b/synth.metadata
index 2a019c7..f1b4acc 100644
--- a/synth.metadata
+++ b/synth.metadata
@@ -4,15 +4,65 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/github-repo-automation.git",
-        "sha": "3b5f955b24722fa883e6d5b423da3f11217be64a"
+        "sha": "ad7eac25d74add9b7b0c856e25578bf6bb68fc9f"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "94421c47802f56a44c320257b2b4c190dc7d6b68"
+        "sha": "8cf6d2834ad14318e64429c3b94f6443ae83daf9"
       }
     }
+  ],
+  "generatedFiles": [
+    ".eslintignore",
+    ".eslintrc.json",
+    ".gitattributes",
+    ".github/ISSUE_TEMPLATE/bug_report.md",
+    ".github/ISSUE_TEMPLATE/feature_request.md",
+    ".github/ISSUE_TEMPLATE/support_request.md",
+    ".github/PULL_REQUEST_TEMPLATE.md",
+    ".github/release-please.yml",
+    ".github/workflows/ci.yaml",
+    ".kokoro/.gitattributes",
+    ".kokoro/common.cfg",
+    ".kokoro/continuous/node10/common.cfg",
+    ".kokoro/continuous/node10/docs.cfg",
+    ".kokoro/continuous/node10/test.cfg",
+    ".kokoro/continuous/node12/common.cfg",
+    ".kokoro/continuous/node12/lint.cfg",
+    ".kokoro/continuous/node12/samples-test.cfg",
+    ".kokoro/continuous/node12/system-test.cfg",
+    ".kokoro/continuous/node12/test.cfg",
+    ".kokoro/docs.sh",
+    ".kokoro/lint.sh",
+    ".kokoro/populate-secrets.sh",
+    ".kokoro/presubmit/node10/common.cfg",
+    ".kokoro/presubmit/node12/common.cfg",
+    ".kokoro/presubmit/node12/samples-test.cfg",
+    ".kokoro/presubmit/node12/system-test.cfg",
+    ".kokoro/presubmit/node12/test.cfg",
+    ".kokoro/publish.sh",
+    ".kokoro/release/docs-devsite.cfg",
+    ".kokoro/release/docs-devsite.sh",
+    ".kokoro/release/docs.cfg",
+    ".kokoro/release/docs.sh",
+    ".kokoro/release/publish.cfg",
+    ".kokoro/samples-test.sh",
+    ".kokoro/system-test.sh",
+    ".kokoro/test.bat",
+    ".kokoro/test.sh",
+    ".kokoro/trampoline.sh",
+    ".mocharc.js",
+    ".nycrc",
+    ".prettierignore",
+    ".prettierrc.js",
+    "CODE_OF_CONDUCT.md",
+    "CONTRIBUTING.md",
+    "LICENSE",
+    "api-extractor.json",
+    "renovate.json",
+    "samples/README.md"
   ]
 }
\ No newline at end of file