diff --git a/.changeset/new-avocados-chew.md b/.changeset/new-avocados-chew.md
new file mode 100644
index 000000000..8c1833e45
--- /dev/null
+++ b/.changeset/new-avocados-chew.md
@@ -0,0 +1,5 @@
+---
+'modular-scripts': major
+---
+
+Upgrade html-minifier-terset to v6.
diff --git a/package.json b/package.json
index 2c07e1da8..e3ce047c0 100644
--- a/package.json
+++ b/package.json
@@ -56,6 +56,7 @@
     "@types/find-up": "4.0.0",
     "@types/fs-extra": "9.0.13",
     "@types/global-modules": "^2.0.0",
+    "@types/html-minifier-terser": "6.1.0",
     "@types/is-ci": "3.0.0",
     "@types/jest": "26.0.24",
     "@types/mime": "^2.0.3",
diff --git a/packages/modular-scripts/package.json b/packages/modular-scripts/package.json
index 10ca314f1..04ee8895a 100644
--- a/packages/modular-scripts/package.json
+++ b/packages/modular-scripts/package.json
@@ -62,6 +62,7 @@
     "globby": "11.0.4",
     "gzip-size": "6.0.0",
     "html-webpack-plugin": "4.5.2",
+    "html-minifier-terser": "6.1.0",
     "is-ci": "2.0.0",
     "is-root": "2.1.0",
     "jest": "26.6.3",
diff --git a/packages/modular-scripts/src/esbuild-scripts/build/index.ts b/packages/modular-scripts/src/esbuild-scripts/build/index.ts
index 4b796aceb..cc43564d0 100644
--- a/packages/modular-scripts/src/esbuild-scripts/build/index.ts
+++ b/packages/modular-scripts/src/esbuild-scripts/build/index.ts
@@ -55,21 +55,21 @@ export default async function build(target: string, paths: Paths) {
   }
 
   const html = await createIndex(paths, result, env.raw, false);
-  await fs.writeFile(
-    path.join(paths.appBuild, 'index.html'),
-    minimize.minify(html, {
-      html5: true,
-      collapseBooleanAttributes: true,
-      collapseWhitespace: true,
-      collapseInlineTagWhitespace: true,
-      decodeEntities: true,
-      minifyCSS: true,
-      minifyJS: true,
-      removeAttributeQuotes: false,
-      removeComments: true,
-      removeTagWhitespace: true,
-    }),
-  );
+
+  const minifiedCode = await minimize.minify(html, {
+    html5: true,
+    collapseBooleanAttributes: true,
+    collapseWhitespace: true,
+    collapseInlineTagWhitespace: true,
+    decodeEntities: true,
+    minifyCSS: true,
+    minifyJS: true,
+    removeAttributeQuotes: false,
+    removeComments: true,
+    removeTagWhitespace: true,
+  });
+
+  await fs.writeFile(path.join(paths.appBuild, 'index.html'), minifiedCode);
 
   return result;
 }
diff --git a/yarn.lock b/yarn.lock
index 46a4fbcf1..26d80e523 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2545,6 +2545,11 @@
   dependencies:
     "@types/node" "*"
 
+"@types/html-minifier-terser@6.1.0":
+  version "6.1.0"
+  resolved "https://registry.yarnpkg.com/@types/html-minifier-terser/-/html-minifier-terser-6.1.0.tgz#4fc33a00c1d0c16987b1a20cf92d20614c55ac35"
+  integrity sha512-oh/6byDPnL1zeNXFrDXFLyZjkr1MsBG667IM792caf1L2UPOOMf65NFzjUH/ltyfwjAGfs1rsX1eftK0jC/KIg==
+
 "@types/html-minifier-terser@^5.0.0":
   version "5.1.2"
   resolved "https://registry.yarnpkg.com/@types/html-minifier-terser/-/html-minifier-terser-5.1.2.tgz#693b316ad323ea97eed6b38ed1a3cc02b1672b57"
@@ -3204,7 +3209,7 @@ acorn@^7.1.1, acorn@^7.4.0:
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-7.4.1.tgz#feaed255973d2e77555b83dbc08851a6c63520fa"
   integrity sha512-nQyp0o1/mNdbTO1PO6kHkwSrmgZ0MT/jCCpNiwbUjGoRN4dlBhqJtoQuCnEOKzgTVwg0ZWiCoQy6SxMebQVh8A==
 
-acorn@^8.2.4, acorn@^8.4.1:
+acorn@^8.2.4, acorn@^8.4.1, acorn@^8.5.0:
   version "8.7.0"
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-8.7.0.tgz#90951fde0f8f09df93549481e5fc141445b791cf"
   integrity sha512-V/LGr1APy+PXIwKebEWrkZPwoeoF+w1jiOBUmuxuiUIaOHtob8Qc9BTrYo7VuI5fR8tqsy+buA2WFooR5olqvQ==
@@ -4357,6 +4362,13 @@ clean-css@^4.2.3:
   dependencies:
     source-map "~0.6.0"
 
+clean-css@^5.2.2:
+  version "5.3.0"
+  resolved "https://registry.yarnpkg.com/clean-css/-/clean-css-5.3.0.tgz#ad3d8238d5f3549e83d5f87205189494bc7cbb59"
+  integrity sha512-YYuuxv4H/iNb1Z/5IbMRoxgrzjWGhOEFfd+groZ5dMCVkpENiMZmwspdrzBo9286JjM1gZJPAyL7ZIdzuvu2AQ==
+  dependencies:
+    source-map "~0.6.0"
+
 clean-stack@^2.0.0:
   version "2.2.0"
   resolved "https://registry.yarnpkg.com/clean-stack/-/clean-stack-2.2.0.tgz#ee8472dbb129e727b31e8a10a427dee9dfe4008b"
@@ -7325,6 +7337,19 @@ html-escaper@^2.0.0:
   resolved "https://registry.yarnpkg.com/html-escaper/-/html-escaper-2.0.2.tgz#dfd60027da36a36dfcbe236262c00a5822681453"
   integrity sha512-H2iMtd0I4Mt5eYiapRdIDjp+XzelXQ0tFE4JS7YFwFevXXMmOp9myNrUvCg0D6ws8iqkRPBfKHgbwig1SmlLfg==
 
+html-minifier-terser@6.1.0:
+  version "6.1.0"
+  resolved "https://registry.yarnpkg.com/html-minifier-terser/-/html-minifier-terser-6.1.0.tgz#bfc818934cc07918f6b3669f5774ecdfd48f32ab"
+  integrity sha512-YXxSlJBZTP7RS3tWnQw74ooKa6L9b9i9QYXY21eUEvhZ3u9XLfv6OnFsQq6RxkhHygsaUMvYsZRV5rU/OVNZxw==
+  dependencies:
+    camel-case "^4.1.2"
+    clean-css "^5.2.2"
+    commander "^8.3.0"
+    he "^1.2.0"
+    param-case "^3.0.4"
+    relateurl "^0.2.7"
+    terser "^5.10.0"
+
 html-minifier-terser@^5.0.1:
   version "5.1.1"
   resolved "https://registry.yarnpkg.com/html-minifier-terser/-/html-minifier-terser-5.1.1.tgz#922e96f1f3bb60832c2634b79884096389b1f054"
@@ -12601,6 +12626,16 @@ terser@^4.1.2, terser@^4.6.3:
     source-map "~0.6.1"
     source-map-support "~0.5.12"
 
+terser@^5.10.0:
+  version "5.12.1"
+  resolved "https://registry.yarnpkg.com/terser/-/terser-5.12.1.tgz#4cf2ebed1f5bceef5c83b9f60104ac4a78b49e9c"
+  integrity sha512-NXbs+7nisos5E+yXwAD+y7zrcTkMqb0dEJxIGtSKPdCBzopf7ni4odPul2aechpV7EXNvOudYOX2bb5tln1jbQ==
+  dependencies:
+    acorn "^8.5.0"
+    commander "^2.20.0"
+    source-map "~0.7.2"
+    source-map-support "~0.5.20"
+
 terser@^5.3.4:
   version "5.10.0"
   resolved "https://registry.yarnpkg.com/terser/-/terser-5.10.0.tgz#b86390809c0389105eb0a0b62397563096ddafcc"