diff --git a/package.json b/package.json
index 2b1f1ed..4e0a9e2 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,7 @@
     "rxjs": "6.6.2"
   },
   "devDependencies": {
-    "@fullhuman/postcss-purgecss": "2.3.0",
+    "@fullhuman/postcss-purgecss": "4.0.3",
     "@types/node": "13.13.15",
     "@types/react": "16.9.46",
     "dotenv": "8.2.0",
diff --git a/yarn.lock b/yarn.lock
index 80d63ab..5596382 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1078,13 +1078,12 @@
   resolved "https://registry.yarnpkg.com/@csstools/convert-colors/-/convert-colors-1.4.0.tgz#ad495dc41b12e75d588c6db8b9834f08fa131eb7"
   integrity sha512-5a6wqoJV/xEdbRNKVo6I4hO3VjyDq//8q2f9I6PBAvMesJHFauXDorcNCsr9RzvsZnaWi5NYCcfyqP1QeFHFbw==
 
-"@fullhuman/postcss-purgecss@2.3.0":
-  version "2.3.0"
-  resolved "https://registry.yarnpkg.com/@fullhuman/postcss-purgecss/-/postcss-purgecss-2.3.0.tgz#50a954757ec78696615d3e118e3fee2d9291882e"
-  integrity sha512-qnKm5dIOyPGJ70kPZ5jiz0I9foVOic0j+cOzNDoo8KoCf6HjicIZ99UfO2OmE7vCYSKAAepEwJtNzpiiZAh9xw==
+"@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:
-    postcss "7.0.32"
-    purgecss "^2.3.0"
+    purgecss "^4.0.3"
 
 "@fullhuman/postcss-purgecss@^2.1.2":
   version "2.1.2"
@@ -2192,6 +2191,11 @@ color@^3.1.2:
     color-convert "^1.9.1"
     color-string "^1.5.2"
 
+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"
@@ -2202,6 +2206,11 @@ commander@^5.0.0:
   resolved "https://registry.yarnpkg.com/commander/-/commander-5.0.0.tgz#dbf1909b49e5044f8fdaf0adc809f0c0722bdfd0"
   integrity sha512-JrDGPAKjMGSP1G0DUoaceEJ3DZgAfr/q6X7FVk4+U5KxUSKviYGM2k6zWkfyyBHy5rAtzgYJFa1ro2O9PtoxwQ==
 
+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==
+
 commondir@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/commondir/-/commondir-1.0.1.tgz#ddd800da0c66127393cca5950ea968a3aaf1253b"
@@ -4209,6 +4218,11 @@ nan@^2.12.1:
   resolved "https://registry.yarnpkg.com/nan/-/nan-2.14.0.tgz#7818f722027b2459a86f0295d434d1fc2336c52c"
   integrity sha512-INOFj37C7k3AfaNTtX8RhsTw7qRy7eLET14cROi9+5HAVbbHuIWUHEauBv5qT4Av2tWasiTY1Jw6puUNqRJXQg==
 
+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"
@@ -5193,6 +5207,15 @@ postcss@^7.0.30:
     source-map "^0.6.1"
     supports-color "^6.1.0"
 
+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"
+
 prepend-http@^1.0.0:
   version "1.0.4"
   resolved "https://registry.yarnpkg.com/prepend-http/-/prepend-http-1.0.4.tgz#d4f4562b0ce3696e41ac52d0e002e57a635dc6dc"
@@ -5313,14 +5336,14 @@ purgecss@^2.1.2:
     postcss "7.0.27"
     postcss-selector-parser "^6.0.2"
 
-purgecss@^2.3.0:
-  version "2.3.0"
-  resolved "https://registry.yarnpkg.com/purgecss/-/purgecss-2.3.0.tgz#5327587abf5795e6541517af8b190a6fb5488bb3"
-  integrity sha512-BE5CROfVGsx2XIhxGuZAT7rTH9lLeQx/6M0P7DTXQH4IUc3BBzs9JUzt4yzGf3JrH9enkeq6YJBe9CTtkm1WmQ==
+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 "^5.0.0"
+    commander "^6.0.0"
     glob "^7.0.0"
-    postcss "7.0.32"
+    postcss "^8.2.1"
     postcss-selector-parser "^6.0.2"
 
 query-string@^4.1.0: