diff --git a/package.json b/package.json
index 7f95c0b..295e26a 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
     "tailwindcss": "1.4.6"
   },
   "devDependencies": {
-    "@fullhuman/postcss-purgecss": "2.3.0",
+    "@fullhuman/postcss-purgecss": "4.0.3",
     "@types/node": "14.0.14",
     "@types/react": "16.9.41",
     "@typescript-eslint/eslint-plugin": "3.4.0",
diff --git a/yarn.lock b/yarn.lock
index 60a9188..8e0eb51 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1135,7 +1135,14 @@
     lodash "^4.17.13"
     to-fast-properties "^2.0.0"
 
-"@fullhuman/postcss-purgecss@2.3.0", "@fullhuman/postcss-purgecss@^2.1.2":
+"@fullhuman/postcss-purgecss@4.0.3":
+  version "4.0.3"
+  resolved "https://registry.yarnpkg.com/@fullhuman/postcss-purgecss/-/postcss-purgecss-4.0.3.tgz#55d71712ec1c7a88e0d1ba5f10ce7fb6aa05beb4"
+  integrity sha512-/EnQ9UDWGGqHkn1UKAwSgh+gJHPKmD+Z+5dQ4gWT4qq2NUyez3zqAfZNwFH3eSgmgO+wjTXfhlLchx2M9/K+7Q==
+  dependencies:
+    purgecss "^4.0.3"
+
+"@fullhuman/postcss-purgecss@^2.1.2":
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/@fullhuman/postcss-purgecss/-/postcss-purgecss-2.3.0.tgz#50a954757ec78696615d3e118e3fee2d9291882e"
   integrity sha512-qnKm5dIOyPGJ70kPZ5jiz0I9foVOic0j+cOzNDoo8KoCf6HjicIZ99UfO2OmE7vCYSKAAepEwJtNzpiiZAh9xw==
@@ -2443,6 +2450,11 @@ colorette@^1.2.0:
   resolved "https://registry.yarnpkg.com/colorette/-/colorette-1.2.0.tgz#45306add826d196e8c87236ac05d797f25982e63"
   integrity sha512-soRSroY+OF/8OdA3PTQXwaDJeMc7TfknKKrxeSCencL2a4+Tx5zhxmmv7hdpCjhKBjehzp8+bwe/T68K0hpIjw==
 
+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==
+
 commander@^2.20.0:
   version "2.20.3"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.20.3.tgz#fd485e84c03eb4881c20722ba48035e8531aeb33"
@@ -2453,6 +2465,11 @@ commander@^5.0.0:
   resolved "https://registry.yarnpkg.com/commander/-/commander-5.1.0.tgz#46abbd1652f8e059bddaef99bbdcb2ad9cf179ae"
   integrity sha512-P0CysNDQ7rtVw4QIQtm+MRxV66vKFSvlsQvGYXZWR3qFU0jlMKHZZZgw8e+8DSah4UDKMqnknRDQz+xuQXQ/Zg==
 
+commander@^6.0.0:
+  version "6.2.1"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-6.2.1.tgz#0792eb682dfbc325999bb2b84fddddba110ac73c"
+  integrity sha512-U7VdrJFnJgo4xjrHpTzu0yrHPGImdsmD95ZlgYSEajAn2JKzDhDTPG9kBTefmObL2w/ngeZnilk+OV9CG3d7UA==
+
 common-tags@^1.8.0:
   version "1.8.0"
   resolved "https://registry.yarnpkg.com/common-tags/-/common-tags-1.8.0.tgz#8e3153e542d4a39e9b10554434afaaf98956a937"
@@ -4807,6 +4824,11 @@ nan@^2.12.1:
   resolved "https://registry.yarnpkg.com/nan/-/nan-2.14.1.tgz#d7be34dfa3105b91494c3147089315eff8874b01"
   integrity sha512-isWHgVjnFjh2x2yuJ/tj3JbwoHu3UC2dX5G/88Cm24yB6YopVgxvBObDY7n5xW6ExmFhJpSEQqFPvq9zaXc8Jw==
 
+nanoid@^3.1.22:
+  version "3.1.22"
+  resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-3.1.22.tgz#b35f8fb7d151990a8aebd5aa5015c03cf726f844"
+  integrity sha512-/2ZUaJX2ANuLtTvqTlgqBQNJoQO398KyJgZloL0PZkC0dpysjncRUPsFe3DUPzz/y3h+u7C46np8RMuvF3jsSQ==
+
 nanomatch@^1.2.9:
   version "1.2.13"
   resolved "https://registry.yarnpkg.com/nanomatch/-/nanomatch-1.2.13.tgz#b87a8aa4fc0de8fe6be88895b38983ff265bd119"
@@ -5769,6 +5791,15 @@ postcss@^6.0.9:
     source-map "^0.6.1"
     supports-color "^5.4.0"
 
+postcss@^8.2.1:
+  version "8.2.13"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.2.13.tgz#dbe043e26e3c068e45113b1ed6375d2d37e2129f"
+  integrity sha512-FCE5xLH+hjbzRdpbRb1IMCvPv9yZx2QnDarBEYSN0N0HYk+TcXsEhwdFcFb+SRWOKzKGErhIEbBK2ogyLdTtfQ==
+  dependencies:
+    colorette "^1.2.2"
+    nanoid "^3.1.22"
+    source-map "^0.6.1"
+
 prelude-ls@^1.2.1:
   version "1.2.1"
   resolved "https://registry.yarnpkg.com/prelude-ls/-/prelude-ls-1.2.1.tgz#debc6489d7a6e6b0e7611888cec880337d316396"
@@ -5911,6 +5942,16 @@ purgecss@^2.3.0:
     postcss "7.0.32"
     postcss-selector-parser "^6.0.2"
 
+purgecss@^4.0.3:
+  version "4.0.3"
+  resolved "https://registry.yarnpkg.com/purgecss/-/purgecss-4.0.3.tgz#8147b429f9c09db719e05d64908ea8b672913742"
+  integrity sha512-PYOIn5ibRIP34PBU9zohUcCI09c7drPJJtTDAc0Q6QlRz2/CHQ8ywGLdE7ZhxU2VTqB7p5wkvj5Qcm05Rz3Jmw==
+  dependencies:
+    commander "^6.0.0"
+    glob "^7.0.0"
+    postcss "^8.2.1"
+    postcss-selector-parser "^6.0.2"
+
 q@^1.1.2:
   version "1.5.1"
   resolved "https://registry.yarnpkg.com/q/-/q-1.5.1.tgz#7e32f75b41381291d04611f1bf14109ac00651d7"