diff --git a/build/build-report.js b/build/build-report.js
index cc051da684ac..4195f4d0eb47 100644
--- a/build/build-report.js
+++ b/build/build-report.js
@@ -6,25 +6,14 @@
 'use strict';
 
 const rollup = require('rollup');
-const {nodeResolve} = require('@rollup/plugin-node-resolve');
-const {terser} = require('rollup-plugin-terser');
-// Only needed b/c getFilenamePrefix loads a commonjs module.
-const commonjs =
-  // @ts-expect-error types are wrong.
-  /** @type {import('rollup-plugin-commonjs').default} */ (require('rollup-plugin-commonjs'));
-
-/**
- * @type {import('@rollup/plugin-typescript').default}
- */
-// @ts-expect-error types are wrong.
-const typescript = require('@rollup/plugin-typescript');
+const rollupPlugins = require('./rollup-plugins.js');
 
 async function buildStandaloneReport() {
   const bundle = await rollup.rollup({
     input: 'report/clients/standalone.js',
     plugins: [
-      commonjs(),
-      terser(),
+      rollupPlugins.commonjs(),
+      rollupPlugins.terser(),
     ],
   });
 
@@ -38,9 +27,9 @@ async function buildFlowReport() {
   const bundle = await rollup.rollup({
     input: 'flow-report/standalone-flow.tsx',
     plugins: [
-      nodeResolve(),
-      commonjs(),
-      typescript({
+      rollupPlugins.nodeResolve(),
+      rollupPlugins.commonjs(),
+      rollupPlugins.typescript({
         tsconfig: 'flow-report/tsconfig.json',
         // Plugin struggles with custom outDir, so revert it from tsconfig value
         // as well as any options that require an outDir is set.
@@ -49,7 +38,7 @@ async function buildFlowReport() {
         emitDeclarationOnly: false,
         declarationMap: false,
       }),
-      terser(),
+      rollupPlugins.terser(),
     ],
   });
 
@@ -63,7 +52,7 @@ async function buildPsiReport() {
   const bundle = await rollup.rollup({
     input: 'report/clients/psi.js',
     plugins: [
-      commonjs(),
+      rollupPlugins.commonjs(),
     ],
   });
 
@@ -77,7 +66,7 @@ async function buildEsModulesBundle() {
   const bundle = await rollup.rollup({
     input: 'report/clients/bundle.js',
     plugins: [
-      commonjs(),
+      rollupPlugins.commonjs(),
     ],
   });
 
@@ -91,7 +80,7 @@ async function buildUmdBundle() {
   const bundle = await rollup.rollup({
     input: 'report/clients/bundle.js',
     plugins: [
-      commonjs(),
+      rollupPlugins.commonjs(),
     ],
   });
 
diff --git a/build/build-smokehouse-bundle.js b/build/build-smokehouse-bundle.js
index 0b9ad9ebdc25..db46639fcaf1 100644
--- a/build/build-smokehouse-bundle.js
+++ b/build/build-smokehouse-bundle.js
@@ -6,22 +6,7 @@
 'use strict';
 
 const rollup = require('rollup');
-
-/**
- * Rollup plugins don't export types that work with commonjs.
- * @template T
- * @param {T} module
- * @return {T['default']}
- */
-function rollupPluginTypeCoerce(module) {
-  // @ts-expect-error
-  return module;
-}
-
-const nodeResolve = rollupPluginTypeCoerce(require('rollup-plugin-node-resolve'));
-const commonjs = rollupPluginTypeCoerce(require('rollup-plugin-commonjs'));
-// @ts-expect-error: no types
-const shim = require('rollup-plugin-shim');
+const rollupPlugins = require('./rollup-plugins.js');
 const {LH_ROOT} = require('../root.js');
 
 const distDir = `${LH_ROOT}/dist`;
@@ -35,9 +20,9 @@ async function build() {
     input: smokehouseLibFilename,
     context: 'globalThis',
     plugins: [
-      nodeResolve(),
-      commonjs(),
-      shim({
+      rollupPlugins.nodeResolve(),
+      rollupPlugins.commonjs(),
+      rollupPlugins.shim({
         [smokehouseCliFilename]: 'export default {}',
       }),
     ],
diff --git a/build/gh-pages-app.js b/build/gh-pages-app.js
index 0b21cbcc71ba..fd4029388b9f 100644
--- a/build/gh-pages-app.js
+++ b/build/gh-pages-app.js
@@ -8,11 +8,7 @@
 const fs = require('fs');
 const path = require('path');
 const rollup = require('rollup');
-const commonjs =
-  // @ts-expect-error types are wrong.
-  /** @type {import('rollup-plugin-commonjs').default} */ (require('rollup-plugin-commonjs'));
-const {terser: rollupTerser} = require('rollup-plugin-terser');
-const {nodeResolve} = require('@rollup/plugin-node-resolve');
+const rollupPlugins = require('./rollup-plugins.js');
 const cpy = require('cpy');
 const ghPages = require('gh-pages');
 const glob = require('glob');
@@ -146,10 +142,10 @@ class GhPagesApp {
    */
   async _rollupSource(input) {
     const plugins = [
-      nodeResolve(),
-      commonjs(),
+      rollupPlugins.nodeResolve(),
+      rollupPlugins.commonjs(),
     ];
-    if (!process.env.DEBUG) plugins.push(rollupTerser());
+    if (!process.env.DEBUG) plugins.push(rollupPlugins.terser());
     const bundle = await rollup.rollup({
       input,
       plugins,
diff --git a/build/rollup-plugins.js b/build/rollup-plugins.js
new file mode 100644
index 000000000000..3328f1047416
--- /dev/null
+++ b/build/rollup-plugins.js
@@ -0,0 +1,32 @@
+/**
+ * @license Copyright 2021 The Lighthouse Authors. All Rights Reserved.
+ * 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.
+ */
+'use strict';
+
+/**
+ * Rollup plugins don't export types that work with commonjs.
+ * @template T
+ * @param {T} module
+ * @return {T['default']}
+ */
+function rollupPluginTypeCoerce(module) {
+  // @ts-expect-error
+  return module;
+}
+
+const commonjs = rollupPluginTypeCoerce(require('@rollup/plugin-commonjs'));
+const {nodeResolve} = require('@rollup/plugin-node-resolve');
+// @ts-expect-error: no published types.
+const shim = require('rollup-plugin-shim');
+const {terser} = require('rollup-plugin-terser');
+const typescript = rollupPluginTypeCoerce(require('@rollup/plugin-typescript'));
+
+module.exports = {
+  commonjs,
+  nodeResolve,
+  shim,
+  terser,
+  typescript,
+};
diff --git a/package.json b/package.json
index a10fd81621a4..2b6985c32a70 100644
--- a/package.json
+++ b/package.json
@@ -92,6 +92,7 @@
   },
   "devDependencies": {
     "@build-tracker/cli": "^1.0.0-beta.15",
+    "@rollup/plugin-commonjs": "^20.0.0",
     "@rollup/plugin-node-resolve": "^13.0.4",
     "@rollup/plugin-typescript": "^8.2.5",
     "@testing-library/preact": "^2.0.1",
@@ -163,7 +164,6 @@
     "pretty-json-stringify": "^0.0.2",
     "puppeteer": "^10.2.0",
     "rollup": "^2.50.6",
-    "rollup-plugin-commonjs": "^10.1.0",
     "rollup-plugin-node-resolve": "^5.2.0",
     "rollup-plugin-shim": "^1.0.0",
     "rollup-plugin-terser": "^7.0.2",
diff --git a/yarn.lock b/yarn.lock
index cf353e7d47e3..619f476c3608 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1212,6 +1212,19 @@
   resolved "https://registry.yarnpkg.com/@protobufjs/utf8/-/utf8-1.1.0.tgz#a777360b5b39a1a2e5106f8e858f2fd2d060c570"
   integrity sha1-p3c2C1s5oaLlEG+OhY8v0tBgxXA=
 
+"@rollup/plugin-commonjs@^20.0.0":
+  version "20.0.0"
+  resolved "https://registry.yarnpkg.com/@rollup/plugin-commonjs/-/plugin-commonjs-20.0.0.tgz#3246872dcbcb18a54aaa6277a8c7d7f1b155b745"
+  integrity sha512-5K0g5W2Ol8hAcTHqcTBHiA7M58tfmYi1o9KxeJuuRNpGaTa5iLjcyemBitCBcKXaHamOBBEH2dGom6v6Unmqjg==
+  dependencies:
+    "@rollup/pluginutils" "^3.1.0"
+    commondir "^1.0.1"
+    estree-walker "^2.0.1"
+    glob "^7.1.6"
+    is-reference "^1.2.1"
+    magic-string "^0.25.7"
+    resolve "^1.17.0"
+
 "@rollup/plugin-node-resolve@^13.0.4":
   version "13.0.4"
   resolved "https://registry.yarnpkg.com/@rollup/plugin-node-resolve/-/plugin-node-resolve-13.0.4.tgz#b10222f4145a019740acb7738402130d848660c0"
@@ -2944,6 +2957,11 @@ commander@~2.17.1:
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.17.1.tgz#bd77ab7de6de94205ceacc72f1716d29f20a77bf"
   integrity sha512-wPMUt6FnH2yzG95SA6mzjQOEKUU3aLaDEmzs1ti+1E9h+CsrZghRlqEM/EJ4KscsQVG8uNN4uVreUeT8+drlgg==
 
+commondir@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/commondir/-/commondir-1.0.1.tgz#ddd800da0c66127393cca5950ea968a3aaf1253b"
+  integrity sha1-3dgA2gxmEnOTzKWVDqloo6rxJTs=
+
 compare-func@^1.3.1:
   version "1.3.2"
   resolved "https://registry.yarnpkg.com/compare-func/-/compare-func-1.3.2.tgz#99dd0ba457e1f9bc722b12c08ec33eeab31fa648"
@@ -4082,6 +4100,11 @@ estree-walker@^1.0.1:
   resolved "https://registry.yarnpkg.com/estree-walker/-/estree-walker-1.0.1.tgz#31bc5d612c96b704106b477e6dd5d8aa138cb700"
   integrity sha512-1fMXF3YP4pZZVozF8j/ZLfvnR8NSIljt56UhbZ5PeeDmmGHpgpdwQt7ITlGvYaQukCvuBRMLEiKiYC+oeIg4cg==
 
+estree-walker@^2.0.1:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/estree-walker/-/estree-walker-2.0.2.tgz#52f010178c2a4c117a7757cfe942adb7d2da4cac"
+  integrity sha512-Rfkk/Mp/DL7JVje3u18FxFujQlTNR2q6QfMSMB7AvCBx91NGj/ba3kCfza0f6dVDbw7YlRf/nDrn7pQrCCyQ/w==
+
 esutils@^2.0.2:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/esutils/-/esutils-2.0.2.tgz#0abf4f1caa5bcb1f7a9d8acc6dea4faaa04bac9b"
@@ -4685,6 +4708,18 @@ glob@^7.0.0, glob@^7.0.3, glob@^7.1.0, glob@^7.1.1, glob@^7.1.2, glob@^7.1.3, gl
     once "^1.3.0"
     path-is-absolute "^1.0.0"
 
+glob@^7.1.6:
+  version "7.2.0"
+  resolved "https://registry.yarnpkg.com/glob/-/glob-7.2.0.tgz#d15535af7732e02e948f4c41628bd910293f6023"
+  integrity sha512-lmLf6gtyrPq8tTjSmrO94wBeQbFR3HbLHbuyD69wuyQkImp2hWqMGB47OX65FBkPffO641IP9jWa1z4ivqG26Q==
+  dependencies:
+    fs.realpath "^1.0.0"
+    inflight "^1.0.4"
+    inherits "2"
+    minimatch "^3.0.4"
+    once "^1.3.0"
+    path-is-absolute "^1.0.0"
+
 global-dirs@^2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/global-dirs/-/global-dirs-2.0.1.tgz#acdf3bb6685bcd55cb35e8a052266569e9469201"
@@ -5410,7 +5445,7 @@ is-potential-custom-element-name@^1.0.1:
   resolved "https://registry.yarnpkg.com/is-potential-custom-element-name/-/is-potential-custom-element-name-1.0.1.tgz#171ed6f19e3ac554394edf78caa05784a45bebb5"
   integrity sha512-bCYeRA2rVibKZd+s2625gGnGF/t7DSqDs4dP7CrLA1m7jKWz6pps0LpYLJN8Q64HtmPKJ1hrN3nzPNKFEKOUiQ==
 
-is-reference@^1.1.2:
+is-reference@^1.2.1:
   version "1.2.1"
   resolved "https://registry.yarnpkg.com/is-reference/-/is-reference-1.2.1.tgz#8b2dac0b371f4bc994fdeaba9eb542d03002d0b7"
   integrity sha512-U82MsXXiFIrjCK4otLT+o2NA2Cd2g5MLoOVXUZjIOhLurrRxpEXzI8O0KZHr3IjLvlAH1kTPYSuqer5T9ZVBKQ==
@@ -6559,7 +6594,7 @@ magic-string@0.25.1:
   dependencies:
     sourcemap-codec "^1.4.1"
 
-magic-string@^0.25.2:
+magic-string@^0.25.7:
   version "0.25.7"
   resolved "https://registry.yarnpkg.com/magic-string/-/magic-string-0.25.7.tgz#3f497d6fd34c669c6798dcb821f2ef31f5445051"
   integrity sha512-4CrMT5DOHTDk4HYDlzmwu4FVCcIYI8gauveasrdCu2IKIFOJ3f0v/8MDGJCDL9oD2ppz/Av1b0Nj345H9M+XIA==
@@ -7938,7 +7973,7 @@ resolve-url@^0.2.1:
   resolved "https://registry.yarnpkg.com/resolve-url/-/resolve-url-0.2.1.tgz#2c637fe77c893afd2a663fe21aa9080068e2052a"
   integrity sha1-LGN/53yJOv0qZj/iGqkIAGjiBSo=
 
-resolve@^1.1.4, resolve@^1.1.5, resolve@^1.10.0, resolve@^1.11.0, resolve@^1.11.1, resolve@^1.17.0, resolve@^1.19.0, resolve@^1.20.0, resolve@^1.4.0:
+resolve@^1.1.4, resolve@^1.1.5, resolve@^1.10.0, resolve@^1.11.1, resolve@^1.17.0, resolve@^1.19.0, resolve@^1.20.0, resolve@^1.4.0:
   version "1.20.0"
   resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.20.0.tgz#629a013fb3f70755d6f0b7935cc1c2c5378b1975"
   integrity sha512-wENBPt4ySzg4ybFQW2TT1zMQucPK95HSh/nq2CFTZVOGut2+pQvSsgtda4d26YrYcr067wjbmzOG8byDPBX63A==
@@ -7997,17 +8032,6 @@ robots-parser@^2.0.1:
   resolved "https://registry.npmjs.org/robots-parser/-/robots-parser-2.1.0.tgz#d16b78ce34e861ab6afbbf0aac65974dbe01566e"
   integrity sha512-k07MeDS1Tl1zjoYs5bHfUbgQ0MfaeTOepDcjZFxdYXd84p6IeLDQyUwlMk2AZ9c2yExA30I3ayWhmqz9tg0DzQ==
 
-rollup-plugin-commonjs@^10.1.0:
-  version "10.1.0"
-  resolved "https://registry.yarnpkg.com/rollup-plugin-commonjs/-/rollup-plugin-commonjs-10.1.0.tgz#417af3b54503878e084d127adf4d1caf8beb86fb"
-  integrity sha512-jlXbjZSQg8EIeAAvepNwhJj++qJWNJw1Cl0YnOqKtP5Djx+fFGkp3WRh+W0ASCaFG5w1jhmzDxgu3SJuVxPF4Q==
-  dependencies:
-    estree-walker "^0.6.1"
-    is-reference "^1.1.2"
-    magic-string "^0.25.2"
-    resolve "^1.11.0"
-    rollup-pluginutils "^2.8.1"
-
 rollup-plugin-node-resolve@^5.2.0:
   version "5.2.0"
   resolved "https://registry.yarnpkg.com/rollup-plugin-node-resolve/-/rollup-plugin-node-resolve-5.2.0.tgz#730f93d10ed202473b1fb54a5997a7db8c6d8523"