diff --git a/package.json b/package.json
index 05bab4116081..717036cd11e2 100644
--- a/package.json
+++ b/package.json
@@ -143,7 +143,7 @@
     "@firebase/app-types": "^0.6.1",
     "@octokit/rest": "18.3.5",
     "@schematics/angular": "^12.0.0-next.0",
-    "@types/autoprefixer": "^9.7.2",
+    "@types/autoprefixer": "^10.2.0",
     "@types/browser-sync": "^2.26.1",
     "@types/fs-extra": "^9.0.5",
     "@types/glob": "^7.1.3",
diff --git a/yarn.lock b/yarn.lock
index e316681e8949..6766d57dd877 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1844,13 +1844,12 @@
   resolved "https://registry.yarnpkg.com/@types/argparse/-/argparse-1.0.38.tgz#a81fd8606d481f873a3800c6ebae4f1d768a56a9"
   integrity sha512-ebDJ9b0e702Yr7pWgB0jzm+CX4Srzz8RcXtLJDJB+BSccqMa36uyH/zUsSYao5+BD1ytv3k3rPYCq4mAE1hsXA==
 
-"@types/autoprefixer@^9.7.2":
-  version "9.7.2"
-  resolved "https://registry.yarnpkg.com/@types/autoprefixer/-/autoprefixer-9.7.2.tgz#64b3251c9675feef5a631b7dd34cfea50a8fdbcc"
-  integrity sha512-QX7U7YW3zX3ex6MECtWO9folTGsXeP4b8bSjTq3I1ODM+H+sFHwGKuof+T+qBcDClGlCGtDb3SVfiTVfmcxw4g==
+"@types/autoprefixer@^10.2.0":
+  version "10.2.0"
+  resolved "https://registry.yarnpkg.com/@types/autoprefixer/-/autoprefixer-10.2.0.tgz#cb6cd67f00337607433b17ebf2cee511db957b9e"
+  integrity sha512-ClU0uw3HhUra890K4xcf2IQxD6w0WOjPIaKb8jrRXYPHvvUW1P5dGufPlDtTo5gtWPWH+4L6tSBAoAKVf93uBQ==
   dependencies:
-    "@types/browserslist" "*"
-    postcss "7.x.x"
+    autoprefixer "*"
 
 "@types/browser-sync@^2.26.1":
   version "2.26.1"
@@ -1862,11 +1861,6 @@
     "@types/serve-static" "*"
     chokidar "^2.1.2"
 
-"@types/browserslist@*":
-  version "4.8.0"
-  resolved "https://registry.yarnpkg.com/@types/browserslist/-/browserslist-4.8.0.tgz#60489aefdf0fcb56c2d8eb65267ff08dad7a526d"
-  integrity sha512-4PyO9OM08APvxxo1NmQyQKlJdowPCOQIy5D/NLO3aO0vGC57wsMptvGp3b8IbYnupFZr92l1dlVief1JvS6STQ==
-
 "@types/color-name@^1.1.1":
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/@types/color-name/-/color-name-1.1.1.tgz#1c1261bbeaa10a8055bbc5d8ab84b7b2afc846a0"
@@ -2804,6 +2798,18 @@ atob@^2.1.1, atob@^2.1.2:
   resolved "https://registry.yarnpkg.com/atob/-/atob-2.1.2.tgz#6d9517eb9e030d2436666651e86bd9f6f13533c9"
   integrity sha512-Wm6ukoaOGJi/73p/cl2GvLjTI5JM1k/O14isD73YML8StrH/7/lRFgmg8nICZgD3bZZvjwCGxtMOD3wWNAu8cg==
 
+autoprefixer@*:
+  version "10.2.5"
+  resolved "https://registry.yarnpkg.com/autoprefixer/-/autoprefixer-10.2.5.tgz#096a0337dbc96c0873526d7fef5de4428d05382d"
+  integrity sha512-7H4AJZXvSsn62SqZyJCP+1AWwOuoYpUfK6ot9vm0e87XD6mT8lDywc9D9OTJPMULyGcvmIxzTAMeG2Cc+YX+fA==
+  dependencies:
+    browserslist "^4.16.3"
+    caniuse-lite "^1.0.30001196"
+    colorette "^1.2.2"
+    fraction.js "^4.0.13"
+    normalize-range "^0.1.2"
+    postcss-value-parser "^4.1.0"
+
 autoprefixer@^6.7.6:
   version "6.7.7"
   resolved "https://registry.yarnpkg.com/autoprefixer/-/autoprefixer-6.7.7.tgz#1dbd1c835658e35ce3f9984099db00585c782014"
@@ -3204,6 +3210,17 @@ browserslist@^4.12.0:
     escalade "^3.1.0"
     node-releases "^1.1.61"
 
+browserslist@^4.16.3:
+  version "4.16.3"
+  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.16.3.tgz#340aa46940d7db878748567c5dea24a48ddf3717"
+  integrity sha512-vIyhWmIkULaq04Gt93txdh+j02yX/JzlyhLYbV3YQCn/zvES3JnY7TifHHvvr1w5hTDluNKMkV05cs4vy8Q7sw==
+  dependencies:
+    caniuse-lite "^1.0.30001181"
+    colorette "^1.2.1"
+    electron-to-chromium "^1.3.649"
+    escalade "^3.1.1"
+    node-releases "^1.1.70"
+
 browserstack-local@^1.3.7:
   version "1.4.8"
   resolved "https://registry.yarnpkg.com/browserstack-local/-/browserstack-local-1.4.8.tgz#07f74a19b324cf2de69ffe65f9c2baa3a2dd9a0e"
@@ -3451,6 +3468,11 @@ caniuse-lite@^1.0.30001109, caniuse-lite@^1.0.30001135:
   resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001144.tgz#bca0fffde12f97e1127a351fec3bfc1971aa3b3d"
   integrity sha512-4GQTEWNMnVZVOFG3BK0xvGeaDAtiPAbG2N8yuMXuXzx/c2Vd4XoMPO8+E918zeXn5IF0FRVtGShBfkfQea2wHQ==
 
+caniuse-lite@^1.0.30001181, caniuse-lite@^1.0.30001196:
+  version "1.0.30001198"
+  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001198.tgz#ed2d9b5f060322ba2efa42afdc56dee3255473f4"
+  integrity sha512-r5GGgESqOPZzwvdLVER374FpQu2WluCF1Z2DSiFJ89KSmGjT0LVKjgv4NcAqHmGWF9ihNpqRI9KXO9Ex4sKsgA==
+
 canonical-path@1.0.0, canonical-path@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/canonical-path/-/canonical-path-1.0.0.tgz#fcb470c23958def85081856be7a86e904f180d1d"
@@ -5038,6 +5060,11 @@ electron-to-chromium@^1.3.571:
   resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.577.tgz#9885f3f72c6e3367010b461ff6f2d9624a929720"
   integrity sha512-dSb64JQSFif/pD8mpVAgSFkbVi6YHbK6JeEziwNNmXlr/Ne2rZtseFK5SM7JoWSLf6gP0gVvRGi4/2ZRhSX/rA==
 
+electron-to-chromium@^1.3.649:
+  version "1.3.685"
+  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.685.tgz#f636d17c9c232c925f8bbfbff4f86303da091ff9"
+  integrity sha512-C3oFZNkJ8lz85ADqr3hzpjBc2ciejMRN2SCd/D0hwcqpr6MGxfdN/j89VN6l+ERTuCUvhg0VYsf40Q4qTz4bhQ==
+
 emoji-regex@^7.0.1:
   version "7.0.3"
   resolved "https://registry.yarnpkg.com/emoji-regex/-/emoji-regex-7.0.3.tgz#933a04052860c85e83c122479c4748a8e4c72156"
@@ -6020,6 +6047,11 @@ forwarded@~0.1.2:
   resolved "https://registry.yarnpkg.com/forwarded/-/forwarded-0.1.2.tgz#98c23dab1175657b8c0573e8ceccd91b0ff18c84"
   integrity sha1-mMI9qxF1ZXuMBXPozszZGw/xjIQ=
 
+fraction.js@^4.0.13:
+  version "4.0.13"
+  resolved "https://registry.yarnpkg.com/fraction.js/-/fraction.js-4.0.13.tgz#3c1c315fa16b35c85fffa95725a36fa729c69dfe"
+  integrity sha512-E1fz2Xs9ltlUp+qbiyx9wmt2n9dRzPsS11Jtdb8D2o+cC7wr9xkkKsVKJuBX0ST+LVS+LhLO+SbLJNtfWcJvXA==
+
 fragment-cache@^0.2.1:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/fragment-cache/-/fragment-cache-0.2.1.tgz#4290fad27f13e89be7f33799c6bc5a0abfff0d19"
@@ -9432,6 +9464,11 @@ node-releases@^1.1.61:
   resolved "https://registry.yarnpkg.com/node-releases/-/node-releases-1.1.61.tgz#707b0fca9ce4e11783612ba4a2fcba09047af16e"
   integrity sha512-DD5vebQLg8jLCOzwupn954fbIiZht05DAZs0k2u8NStSe6h9XdsuIQL8hSRKYiU8WUQRznmSDrKGbv3ObOmC7g==
 
+node-releases@^1.1.70:
+  version "1.1.71"
+  resolved "https://registry.yarnpkg.com/node-releases/-/node-releases-1.1.71.tgz#cb1334b179896b1c89ecfdd4b725fb7bbdfc7dbb"
+  integrity sha512-zR6HoT6LrLCRBwukmrVbHv0EpEQjksO6GmFcZQQuCAy139BEsoVKPYnf3jongYW83fAa1torLGYwxxky/p28sg==
+
 node-sass@^4.8.3:
   version "4.14.1"
   resolved "https://registry.yarnpkg.com/node-sass/-/node-sass-4.14.1.tgz#99c87ec2efb7047ed638fb4c9db7f3a42e2217b5"