diff --git a/packages/docusaurus/package.json b/packages/docusaurus/package.json
index fca8861f58..7548ba5e2a 100644
--- a/packages/docusaurus/package.json
+++ b/packages/docusaurus/package.json
@@ -66,7 +66,7 @@
     "clean-css": "^5.1.1",
     "commander": "^5.1.0",
     "copy-webpack-plugin": "^6.4.1",
-    "core-js": "^2.6.5",
+    "core-js": "^3.9.1",
     "css-loader": "^5.1.1",
     "del": "^6.0.0",
     "detect-port": "^1.3.0",
diff --git a/yarn.lock b/yarn.lock
index 088cf8c049..94d7fc58b9 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5362,18 +5362,7 @@ browserslist@4.14.2:
     escalade "^3.0.2"
     node-releases "^1.1.61"
 
-browserslist@^4.0.0, browserslist@^4.12.0, browserslist@^4.14.5, browserslist@^4.16.1, browserslist@^4.6.4:
-  version "4.16.1"
-  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.16.1.tgz#bf757a2da376b3447b800a16f0f1c96358138766"
-  integrity sha512-UXhDrwqsNcpTYJBTZsbGATDxZbiVDsx6UjpmRUmtnP10pr8wAYr5LgFoEFw9ixriQH2mv/NX2SfGzE/o8GndLA==
-  dependencies:
-    caniuse-lite "^1.0.30001173"
-    colorette "^1.2.1"
-    electron-to-chromium "^1.3.634"
-    escalade "^3.1.1"
-    node-releases "^1.1.69"
-
-browserslist@^4.16.3:
+browserslist@^4.0.0, browserslist@^4.12.0, browserslist@^4.14.5, browserslist@^4.16.1, browserslist@^4.16.3, browserslist@^4.6.4:
   version "4.16.3"
   resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.16.3.tgz#340aa46940d7db878748567c5dea24a48ddf3717"
   integrity sha512-vIyhWmIkULaq04Gt93txdh+j02yX/JzlyhLYbV3YQCn/zvES3JnY7TifHHvvr1w5hTDluNKMkV05cs4vy8Q7sw==
@@ -5746,15 +5735,10 @@ caniuse-api@^3.0.0:
     lodash.memoize "^4.1.2"
     lodash.uniq "^4.5.0"
 
-caniuse-lite@^1.0.0, caniuse-lite@^1.0.30000981, caniuse-lite@^1.0.30001109, caniuse-lite@^1.0.30001125, caniuse-lite@^1.0.30001173:
-  version "1.0.30001191"
-  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001191.tgz#bacb432b6701f690c8c5f7c680166b9a9f0843d9"
-  integrity sha512-xJJqzyd+7GCJXkcoBiQ1GuxEiOBCLQ0aVW9HMekifZsAVGdj5eJ4mFB9fEhSHipq9IOk/QXFJUiIr9lZT+EsGw==
-
-caniuse-lite@^1.0.30001181, caniuse-lite@^1.0.30001196:
-  version "1.0.30001196"
-  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001196.tgz#00518a2044b1abf3e0df31fadbe5ed90b63f4e64"
-  integrity sha512-CPvObjD3ovWrNBaXlAIGWmg2gQQuJ5YhuciUOjPRox6hIQttu8O+b51dx6VIpIY9ESd2d0Vac1RKpICdG4rGUg==
+caniuse-lite@^1.0.0, caniuse-lite@^1.0.30000981, caniuse-lite@^1.0.30001109, caniuse-lite@^1.0.30001125, caniuse-lite@^1.0.30001173, caniuse-lite@^1.0.30001181, caniuse-lite@^1.0.30001196:
+  version "1.0.30001197"
+  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001197.tgz#47ad15b977d2f32b3ec2fe2b087e0c50443771db"
+  integrity sha512-8aE+sqBqtXz4G8g35Eg/XEaFr2N7rd/VQ6eABGBmNtcB8cN6qNJhMi6oSFy4UWWZgqgL3filHT8Nha4meu3tsw==
 
 capture-exit@^2.0.0:
   version "2.0.0"
@@ -6324,12 +6308,7 @@ color@^3.0.0, color@^3.1.3:
     color-convert "^1.9.1"
     color-string "^1.5.4"
 
-colorette@^1.2.1:
-  version "1.2.1"
-  resolved "https://registry.yarnpkg.com/colorette/-/colorette-1.2.1.tgz#4d0b921325c14faf92633086a536db6e89564b1b"
-  integrity sha512-puCDz0CzydiSYOrnXpz/PKd69zRrribezjtE9yd4zvytoRc8+RY/KJPvtPFKZS3E3wP6neGyMe0vOTlHO5L3Pw==
-
-colorette@^1.2.2:
+colorette@^1.2.1, colorette@^1.2.2:
   version "1.2.2"
   resolved "https://registry.yarnpkg.com/colorette/-/colorette-1.2.2.tgz#cbcc79d5e99caea2dbf10eb3a26fd8b3e6acfa94"
   integrity sha512-MKGMzyfeuutC/ZJ1cba9NqcNpfeqMUcYmyF1ZFY6/Cn7CNSAKx6a+s48sqLqyAiZuaP2TcqMhoo+dlwFnVxT9w==
@@ -6813,10 +6792,10 @@ core-js@^2.4.1, core-js@^2.6.5:
   resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.6.11.tgz#38831469f9922bded8ee21c9dc46985e0399308c"
   integrity sha512-5wjnpaT/3dV+XB4borEsnAYQchn00XSgTAWKDkEqv+K8KevjbzmofK6hfJ9TZIlpj2N0xQpazy7PiRQiWHqzWg==
 
-core-js@^3.4.1:
-  version "3.6.0"
-  resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.6.0.tgz#2b854e451de1967d1e29896025cdc13a2518d9ea"
-  integrity sha512-AHPTNKzyB+YwgDWoSOCaid9PUSEF6781vsfiK8qUz62zRR448/XgK2NtCbpiUGizbep8Lrpt0Du19PpGGZvw3Q==
+core-js@^3.4.1, core-js@^3.9.1:
+  version "3.9.1"
+  resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.9.1.tgz#cec8de593db8eb2a85ffb0dbdeb312cb6e5460ae"
+  integrity sha512-gSjRvzkxQc1zjM/5paAmL4idJBFzuJoo+jDjF1tStYFMV2ERfD02HhahhCGXUyHxQRG4yFKVSdO6g62eoRMcDg==
 
 core-util-is@1.0.2, core-util-is@~1.0.0:
   version "1.0.2"
@@ -8003,15 +7982,10 @@ ejs@^2.6.1:
   resolved "https://registry.yarnpkg.com/ejs/-/ejs-2.7.4.tgz#48661287573dcc53e366c7a1ae52c3a120eec9ba"
   integrity sha512-7vmuyh5+kuUyJKePhQfRQBhXV5Ce+RnaeeQArKu1EAMpL3WbgMt5WG6uQZpEVvYSSsxMXRKOewtDk9RaTKXRlA==
 
-electron-to-chromium@^1.3.564, electron-to-chromium@^1.3.634:
-  version "1.3.671"
-  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.671.tgz#8feaed6eae42d279fa4611f58c42a5a1eb81b2a0"
-  integrity sha512-RTD97QkdrJKaKwRv9h/wGAaoR2lGxNXEcBXS31vjitgTPwTWAbLdS7cEsBK68eEQy7p6YyT8D5BxBEYHu2SuwQ==
-
-electron-to-chromium@^1.3.649:
-  version "1.3.681"
-  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.681.tgz#facd915ae46a020e8be566a2ecdc0b9444439be9"
-  integrity sha512-W6uYvSUTHuyX2DZklIESAqx57jfmGjUkd7Z3RWqLdj9Mmt39ylhBuvFXlskQnvBHj0MYXIeQI+mjiwVddZLSvA==
+electron-to-chromium@^1.3.564, electron-to-chromium@^1.3.634, electron-to-chromium@^1.3.649:
+  version "1.3.683"
+  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.683.tgz#2c9ab53ff5275cf3dd49278af714d0f8975204f7"
+  integrity sha512-8mFfiAesXdEdE0DhkMKO7W9U6VU/9T3VTWwZ+4g84/YMP4kgwgFtQgUxuu7FUMcvSeKSNhFQNU+WZ68BQTLT5A==
 
 elf-tools@^1.1.1:
   version "1.1.1"
@@ -14266,12 +14240,7 @@ node-notifier@^8.0.0:
     uuid "^8.3.0"
     which "^2.0.2"
 
-node-releases@^1.1.61, node-releases@^1.1.69:
-  version "1.1.70"
-  resolved "https://registry.yarnpkg.com/node-releases/-/node-releases-1.1.70.tgz#66e0ed0273aa65666d7fe78febe7634875426a08"
-  integrity sha512-Slf2s69+2/uAD79pVVQo8uSiC34+g8GWY8UH2Qtqv34ZfhYrxpYpfzs9Js9d6O0mbDmALuxaTlplnBTnSELcrw==
-
-node-releases@^1.1.70:
+node-releases@^1.1.61, node-releases@^1.1.69, 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==