diff --git a/package.json b/package.json
index 7f95c0b..adce30f 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": "4.0.0",
     "@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..8389c57 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@4.0.0":
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/@fullhuman/postcss-purgecss/-/postcss-purgecss-4.0.0.tgz#9e27ccdc5d19192af8b59d9d9e4f480cfb5c55c9"
+  integrity sha512-1DNYIDxFsvGOeKdc2BFtIQriMWwzX6dY+9q0Z0n9TNZhFZ9T6nHRZHPC22aYLlPDd0ucCgIr1deTgDTrjq21KQ==
+  dependencies:
+    purgecss "^4.0.0"
+
+"@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@^1.2.1:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/colorette/-/colorette-1.2.1.tgz#4d0b921325c14faf92633086a536db6e89564b1b"
+  integrity sha512-puCDz0CzydiSYOrnXpz/PKd69zRrribezjtE9yd4zvytoRc8+RY/KJPvtPFKZS3E3wP6neGyMe0vOTlHO5L3Pw==
+
 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@^3.1.20:
+  version "3.1.20"
+  resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-3.1.20.tgz#badc263c6b1dcf14b71efaa85f6ab4c1d6cfc788"
+  integrity sha512-a1cQNyczgKbLX9jwbS/+d7W8fX/RfgYR7lVWwWOGIPNgK2m0MWvrGF6/m4kk6U3QcFMnZf3RIhL0v2Jgh/0Uxw==
+
 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 "8.2.4"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.2.4.tgz#20a98a39cf303d15129c2865a9ec37eda0031d04"
+  integrity sha512-kRFftRoExRVXZlwUuay9iC824qmXPcQQVzAjbCCgjpXnkdMCJYBu2gTwAaFBzv8ewND6O8xFb3aELmEkh9zTzg==
+  dependencies:
+    colorette "^1.2.1"
+    nanoid "^3.1.20"
+    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@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/purgecss/-/purgecss-4.0.0.tgz#25446199df2ec40d418caf4b95c7548a011be3f1"
+  integrity sha512-j/y6OtNpEiggw/ipCJUOMNLgLpeAv9L8q+SqzEdDzyVEZOfdWjg8yvgOxhBflNyYgJ8SZ+tTwPxrHT9vQUpEPw==
+  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"