diff --git a/package.json b/package.json
index c6665fc65a1..faefda2014f 100644
--- a/package.json
+++ b/package.json
@@ -111,7 +111,7 @@
     "babel-plugin-istanbul": "^6.0.0",
     "bootstrap-icons": "^1.2.2",
     "bundlewatch": "^0.3.1",
-    "clean-css-cli": "^4.3.0",
+    "clean-css-cli": "^5.6.2",
     "codemirror": "^5.59.0",
     "codesandbox": "^2.2.1",
     "core-js": "^3.8.1",
diff --git a/yarn.lock b/yarn.lock
index 105073e6efb..fa45e22df0d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2549,7 +2549,7 @@ anymatch@^2.0.0:
     micromatch "^3.1.4"
     normalize-path "^2.1.1"
 
-anymatch@^3.0.3, anymatch@~3.1.1:
+anymatch@^3.0.3:
   version "3.1.1"
   resolved "https://registry.yarnpkg.com/anymatch/-/anymatch-3.1.1.tgz#c55ecf02185e2469259399310c173ce31233b142"
   integrity sha512-mM8522psRCqzV+6LhomX5wgp25YVibjh8Wj23I5RPkPppSVSjyKD2A2mBJmWGa+KN7f2D6LNh9jkBCeyLktzjg==
@@ -2557,6 +2557,14 @@ anymatch@^3.0.3, anymatch@~3.1.1:
     normalize-path "^3.0.0"
     picomatch "^2.0.4"
 
+anymatch@~3.1.2:
+  version "3.1.3"
+  resolved "https://registry.yarnpkg.com/anymatch/-/anymatch-3.1.3.tgz#790c58b19ba1720a84205b57c618d5ad8524973e"
+  integrity sha512-KMReFUr0B4t+D+OBkjR3KYqvocp2XaSzO55UcB6mgQMd3KbcE+mWTyvVV7D/zsdEbNnV6acZUutkiHQXvTr1Rw==
+  dependencies:
+    normalize-path "^3.0.0"
+    picomatch "^2.0.4"
+
 aproba@^1.1.1:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/aproba/-/aproba-1.2.0.tgz#6802e6264efd18c790a1b0d517f0f2627bf2c94a"
@@ -3645,20 +3653,20 @@ check-types@^8.0.3:
   resolved "https://registry.yarnpkg.com/check-types/-/check-types-8.0.3.tgz#3356cca19c889544f2d7a95ed49ce508a0ecf552"
   integrity sha512-YpeKZngUmG65rLudJ4taU7VLkOCTMhNl/u4ctNC56LQS/zJTyNH0Lrtwm1tfTsbLlwvlfsA2d1c8vCf/Kh2KwQ==
 
-"chokidar@>=2.0.0 <4.0.0", chokidar@^3.3.0, chokidar@^3.4.0, chokidar@^3.4.1, chokidar@^3.4.3:
-  version "3.4.3"
-  resolved "https://registry.yarnpkg.com/chokidar/-/chokidar-3.4.3.tgz#c1df38231448e45ca4ac588e6c79573ba6a57d5b"
-  integrity sha512-DtM3g7juCXQxFVSNPNByEC2+NImtBuxQQvWlHunpJIS5Ocr0lG306cC7FCi7cEA0fzmybPUIl4txBIobk1gGOQ==
+"chokidar@>=2.0.0 <4.0.0", chokidar@^3.3.0, chokidar@^3.4.0, chokidar@^3.4.1, chokidar@^3.4.3, chokidar@^3.5.2:
+  version "3.5.3"
+  resolved "https://registry.yarnpkg.com/chokidar/-/chokidar-3.5.3.tgz#1cf37c8707b932bd1af1ae22c0432e2acd1903bd"
+  integrity sha512-Dr3sfKRP6oTcjf2JmUmFJfeVMvXBdegxB0iVQ5eb2V10uFJUCAS8OByZdVAyVb8xXNz3GjjTgj9kLWsZTqE6kw==
   dependencies:
-    anymatch "~3.1.1"
+    anymatch "~3.1.2"
     braces "~3.0.2"
-    glob-parent "~5.1.0"
+    glob-parent "~5.1.2"
     is-binary-path "~2.1.0"
     is-glob "~4.0.1"
     normalize-path "~3.0.0"
-    readdirp "~3.5.0"
+    readdirp "~3.6.0"
   optionalDependencies:
-    fsevents "~2.1.2"
+    fsevents "~2.3.2"
 
 chokidar@^2.1.8:
   version "2.1.8"
@@ -3729,14 +3737,15 @@ class-utils@^0.3.5:
     isobject "^3.0.0"
     static-extend "^0.1.1"
 
-clean-css-cli@^4.3.0:
-  version "4.3.0"
-  resolved "https://registry.yarnpkg.com/clean-css-cli/-/clean-css-cli-4.3.0.tgz#8502aa86d1879e5b111af51b3c2abb799e0684ce"
-  integrity sha512-8GHZfr+mG3zB/Lgqrr27qHBFsPSn0fyEI3f2rIZpxPxUbn2J6A8xyyeBRVTW8duDuXigN0s80vsXiXJOEFIO5Q==
+clean-css-cli@^5.6.2:
+  version "5.6.2"
+  resolved "https://registry.yarnpkg.com/clean-css-cli/-/clean-css-cli-5.6.2.tgz#7b645ebb8025e56e6c66f535f4a92d9c9bba9f19"
+  integrity sha512-GDQkr6zVqHJhO3yWTy3sA22sMCT6iUqaJuBdqZMW6oI25MtiJ2iZXDmWzErpjoRotsB+TYPTpuZSNSgaC1n4lA==
   dependencies:
-    clean-css "^4.2.1"
-    commander "2.x"
-    glob "7.x"
+    chokidar "^3.5.2"
+    clean-css "^5.3.2"
+    commander "7.x"
+    glob "^7.1.6"
 
 clean-css@^4.2.1, clean-css@^4.2.3:
   version "4.2.3"
@@ -3745,6 +3754,13 @@ clean-css@^4.2.1, clean-css@^4.2.3:
   dependencies:
     source-map "~0.6.0"
 
+clean-css@^5.3.2:
+  version "5.3.2"
+  resolved "https://registry.yarnpkg.com/clean-css/-/clean-css-5.3.2.tgz#70ecc7d4d4114921f5d298349ff86a31a9975224"
+  integrity sha512-JVJbM+f3d3Q704rF4bqQ5UUyTtuJ0JRKNbTKVEeujCCBoMdkEi+V+e8oktO9qGQNSvHrFTM6JZRXrUvGR1czww==
+  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"
@@ -3973,7 +3989,12 @@ comma-separated-tokens@^1.0.0:
   resolved "https://registry.yarnpkg.com/comma-separated-tokens/-/comma-separated-tokens-1.0.8.tgz#632b80b6117867a158f1080ad498b2fbe7e3f5ea"
   integrity sha512-GHuDRO12Sypu2cV70d1dkA2EUmXHgntrzbpvOB+Qy+49ypNfGgFQIC2fhhXbnyrJRynDCAARsT7Ou0M6hirpfw==
 
-commander@2.x, commander@^2.18.0, commander@^2.19.0, commander@^2.20.0, commander@^2.9.0:
+commander@7.x:
+  version "7.2.0"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-7.2.0.tgz#a36cb57d0b501ce108e4d20559a150a391d97ab7"
+  integrity sha512-QrWXB+ZQSVPmIWIhtEO9H+gwHaMGYiF5ChvoJ+K9ZGHG/sVsa6yiesAD1GC/x46sET00Xlwo1u49RVVVzvcSkw==
+
+commander@^2.18.0, commander@^2.19.0, commander@^2.20.0, commander@^2.9.0:
   version "2.20.3"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.20.3.tgz#fd485e84c03eb4881c20722ba48035e8531aeb33"
   integrity sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ==
@@ -6327,6 +6348,11 @@ fsevents@~2.1.2:
   resolved "https://registry.yarnpkg.com/fsevents/-/fsevents-2.1.3.tgz#fb738703ae8d2f9fe900c33836ddebee8b97f23e"
   integrity sha512-Auw9a4AxqWpa9GUfj370BMPzzyncfBABW8Mab7BGWBYDj4Isgq+cDKtx0i6u9jcX9pQDnswsaaOTgTmA5pEjuQ==
 
+fsevents@~2.3.2:
+  version "2.3.2"
+  resolved "https://registry.yarnpkg.com/fsevents/-/fsevents-2.3.2.tgz#8a526f78b8fdf4623b709e0b975c52c24c02fd1a"
+  integrity sha512-xiqMQR4xAeHTuB9uWm+fFRcIOgKBMiOBP+eXiyT7jsgVCq1bkVygt00oASowB7EdtpOHaaPgKt812P9ab+DDKA==
+
 function-bind@^1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/function-bind/-/function-bind-1.1.1.tgz#a56899d3ea3c9bab874bb9773b7c5ede92f4895d"
@@ -6546,14 +6572,21 @@ glob-parent@^3.1.0:
     is-glob "^3.1.0"
     path-dirname "^1.0.0"
 
-glob-parent@^5.0.0, glob-parent@^5.1.0, glob-parent@~5.1.0:
+glob-parent@^5.0.0, glob-parent@^5.1.0:
   version "5.1.1"
   resolved "https://registry.yarnpkg.com/glob-parent/-/glob-parent-5.1.1.tgz#b6c1ef417c4e5663ea498f1c45afac6916bbc229"
   integrity sha512-FnI+VGOpnlGHWZxthPGR+QhR78fuiK0sNLkHQv+bL9fQi57lNNdquIbna/WrfROrolq8GK5Ek6BiMwqL/voRYQ==
   dependencies:
     is-glob "^4.0.1"
 
-glob@7.x, glob@^7.0.0, glob@^7.1.1, glob@^7.1.2, glob@^7.1.3, glob@^7.1.4, glob@^7.1.6:
+glob-parent@~5.1.2:
+  version "5.1.2"
+  resolved "https://registry.yarnpkg.com/glob-parent/-/glob-parent-5.1.2.tgz#869832c58034fe68a4093c17dc15e8340d8401c4"
+  integrity sha512-AOIgSQCepiJYwP3ARnGx+5VnTu2HBYdzbGP45eLw1vr3zB3vZLeyed1sC9hnbcOc9/SrMyM5RPQrkGz4aS9Zow==
+  dependencies:
+    is-glob "^4.0.1"
+
+glob@^7.0.0, glob@^7.1.1, glob@^7.1.2, glob@^7.1.3, glob@^7.1.4, glob@^7.1.6:
   version "7.1.6"
   resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.6.tgz#141f33b81a7c2492e125594307480c46679278a6"
   integrity sha512-LwaxwyZ72Lk7vZINtNNrywX0ZuLyStrdDtabefZKAY5ZGJhVtgdznluResxNmPitE0SAO+O26sWTHeKSI2wMBA==
@@ -11670,10 +11703,10 @@ readdirp@^2.2.1:
     micromatch "^3.1.10"
     readable-stream "^2.0.2"
 
-readdirp@~3.5.0:
-  version "3.5.0"
-  resolved "https://registry.yarnpkg.com/readdirp/-/readdirp-3.5.0.tgz#9ba74c019b15d365278d2e91bb8c48d7b4d42c9e"
-  integrity sha512-cMhu7c/8rdhkHXWsY+osBhfSy0JikwpHK/5+imo+LpeasTF8ouErHrlYkwT0++njiyuDvc7OFY5T3ukvZ8qmFQ==
+readdirp@~3.6.0:
+  version "3.6.0"
+  resolved "https://registry.yarnpkg.com/readdirp/-/readdirp-3.6.0.tgz#74a370bd857116e245b29cc97340cd431a02a6c7"
+  integrity sha512-hOS089on8RduqdbhvQ5Z37A0ESjsqz6qnRcffsMU3495FuTdqSm+7bhJ29JvIOsBDEEnan5DPu9t3To9VRlMzA==
   dependencies:
     picomatch "^2.2.1"