diff --git a/packages/web-config/package.json b/packages/web-config/package.json
index 725588917712..b859122d040c 100644
--- a/packages/web-config/package.json
+++ b/packages/web-config/package.json
@@ -15,7 +15,7 @@
     "@types/html-webpack-plugin": "3.2.1",
     "@types/webpack": "4.41.0",
     "ansi-escapes": "4.3.0",
-    "autoprefixer": "9.6.1",
+    "autoprefixer": "9.7.4",
     "babel-loader": "8.0.6",
     "browser-resolve": "1.11.3",
     "chai": "4.2.0",
diff --git a/yarn.lock b/yarn.lock
index 3a421a63bd42..ed76944d1750 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5836,18 +5836,18 @@ automatic-semicolon-insertion@^2.0.5:
     "@babel/traverse" "^7.6.2"
     "@babel/types" "^7.6.1"
 
-autoprefixer@9.6.1:
-  version "9.6.1"
-  resolved "https://registry.yarnpkg.com/autoprefixer/-/autoprefixer-9.6.1.tgz#51967a02d2d2300bb01866c1611ec8348d355a47"
-  integrity sha512-aVo5WxR3VyvyJxcJC3h4FKfwCQvQWb1tSI5VHNibddCVWrcD1NvlxEweg3TSgiPztMnWfjpy2FURKA2kvDE+Tw==
+autoprefixer@9.7.4:
+  version "9.7.4"
+  resolved "https://registry.yarnpkg.com/autoprefixer/-/autoprefixer-9.7.4.tgz#f8bf3e06707d047f0641d87aee8cfb174b2a5378"
+  integrity sha512-g0Ya30YrMBAEZk60lp+qfX5YQllG+S5W3GYCFvyHTvhOki0AEQJLPEcIuGRsqVwLi8FvXPVtwTGhfr38hVpm0g==
   dependencies:
-    browserslist "^4.6.3"
-    caniuse-lite "^1.0.30000980"
+    browserslist "^4.8.3"
+    caniuse-lite "^1.0.30001020"
     chalk "^2.4.2"
     normalize-range "^0.1.2"
     num2fraction "^1.2.2"
-    postcss "^7.0.17"
-    postcss-value-parser "^4.0.0"
+    postcss "^7.0.26"
+    postcss-value-parser "^4.0.2"
 
 aws-sdk@2.447.0:
   version "2.447.0"
@@ -7516,7 +7516,7 @@ browserify@^16.1.0:
     vm-browserify "^1.0.0"
     xtend "^4.0.0"
 
-browserslist@^4.5.2, browserslist@^4.6.0, browserslist@^4.6.3, browserslist@^4.7.2:
+browserslist@^4.5.2, browserslist@^4.6.0, browserslist@^4.7.2:
   version "4.7.2"
   resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.7.2.tgz#1bb984531a476b5d389cedecb195b2cd69fb1348"
   integrity sha512-uZavT/gZXJd2UTi9Ov7/Z340WOSQ3+m1iBVRUknf+okKxonL9P83S3ctiBDtuRmRu8PiCHjqyueqQ9HYlJhxiw==
@@ -7914,11 +7914,16 @@ camelcase@^5.0.0, camelcase@^5.2.0, camelcase@^5.3.1:
   resolved "https://registry.yarnpkg.com/camelcase/-/camelcase-5.3.1.tgz#e3c9b31569e106811df242f715725a1f4c494320"
   integrity sha512-L28STB170nwWS63UjtlEOE3dldQApaJXZkOI1uMFfzf3rRuPegHaHesyee+YxQ+W6SvRDQV6UrdOdRiR153wJg==
 
-caniuse-lite@^1.0.30000980, caniuse-lite@^1.0.30001004:
+caniuse-lite@^1.0.30001004:
   version "1.0.30001009"
   resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001009.tgz#69b77997b882a7aee6af24c8d7d2fa27ee41f348"
   integrity sha512-M3rEqHN6SaVjgo4bIik7HsGcWXsi+lI9WA0p51RPMFx5gXfduyOXWJrc0R4xBkSK1pgNf4CNgy5M+6H+WiEP8g==
 
+caniuse-lite@^1.0.30001020:
+  version "1.0.30001030"
+  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001030.tgz#78076c4c6d67d3e41d6eb9399853fb27fe6e44ee"
+  integrity sha512-QGK0W4Ft/Ac+zTjEiRJfwDNATvS3fodDczBXrH42784kcfqcDKpEPfN08N0HQjrAp8He/Jw8QiSS9QRn7XAbUw==
+
 caniuse-lite@^1.0.30001023:
   version "1.0.30001027"
   resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001027.tgz#283e2ef17d94889cc216a22c6f85303d78ca852d"
@@ -19801,10 +19806,10 @@ postcss-value-parser@^3.3.0, postcss-value-parser@^3.3.1:
   resolved "https://registry.yarnpkg.com/postcss-value-parser/-/postcss-value-parser-3.3.1.tgz#9ff822547e2893213cf1c30efa51ac5fd1ba8281"
   integrity sha512-pISE66AbVkp4fDQ7VHBwRNXzAAKJjw4Vw7nWI/+Q3vuly7SNfgYXvm6i5IgFylHGK5sP/xHAbB7N49OS4gWNyQ==
 
-postcss-value-parser@^4.0.0:
-  version "4.0.2"
-  resolved "https://registry.yarnpkg.com/postcss-value-parser/-/postcss-value-parser-4.0.2.tgz#482282c09a42706d1fc9a069b73f44ec08391dc9"
-  integrity sha512-LmeoohTpp/K4UiyQCwuGWlONxXamGzCMtFxLq4W1nZVGIQLYvMCJx3yAF9qyyuFpflABI9yVdtJAqbihOsCsJQ==
+postcss-value-parser@^4.0.2:
+  version "4.0.3"
+  resolved "https://registry.yarnpkg.com/postcss-value-parser/-/postcss-value-parser-4.0.3.tgz#651ff4593aa9eda8d5d0d66593a2417aeaeb325d"
+  integrity sha512-N7h4pG+Nnu5BEIzyeaaIYWs0LI5XC40OrRh5L60z0QjFsqGWcHcbkBvpe1WYpcIS9yQ8sOi/vIPt1ejQCrMVrg==
 
 postcss-values-parser@^1.5.0:
   version "1.5.0"
@@ -19824,7 +19829,7 @@ postcss@7.0.14:
     source-map "^0.6.1"
     supports-color "^6.1.0"
 
-postcss@^7.0.0, postcss@^7.0.14, postcss@^7.0.17, postcss@^7.0.2, postcss@^7.0.5, postcss@^7.0.6:
+postcss@^7.0.0, postcss@^7.0.14, postcss@^7.0.2, postcss@^7.0.5, postcss@^7.0.6:
   version "7.0.21"
   resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.21.tgz#06bb07824c19c2021c5d056d5b10c35b989f7e17"
   integrity sha512-uIFtJElxJo29QC753JzhidoAhvp/e/Exezkdhfmt8AymWT6/5B7W1WmponYWkHk2eg6sONyTch0A3nkMPun3SQ==
@@ -19833,6 +19838,15 @@ postcss@^7.0.0, postcss@^7.0.14, postcss@^7.0.17, postcss@^7.0.2, postcss@^7.0.5
     source-map "^0.6.1"
     supports-color "^6.1.0"
 
+postcss@^7.0.26:
+  version "7.0.27"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.27.tgz#cc67cdc6b0daa375105b7c424a85567345fc54d9"
+  integrity sha512-WuQETPMcW9Uf1/22HWUWP9lgsIC+KEHg2kozMflKjbeUtw9ujvFX6QmIfozaErDkmLWS9WEnEdEe6Uo9/BNTdQ==
+  dependencies:
+    chalk "^2.4.2"
+    source-map "^0.6.1"
+    supports-color "^6.1.0"
+
 postinstall-build@2.1.3:
   version "2.1.3"
   resolved "https://registry.yarnpkg.com/postinstall-build/-/postinstall-build-2.1.3.tgz#9d1886ab2949619f4c206afbe1aea95debe45c94"