diff --git a/package-lock.json b/package-lock.json
index 71cccc5..eb6858f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5,13 +5,12 @@
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+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/@fullhuman/postcss-purgecss/-/postcss-purgecss-4.0.3.tgz",
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       "requires": {
-        "postcss": "7.0.32",
-        "purgecss": "^2.3.0"
+        "purgecss": "^4.0.3"
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@@ -309,9 +308,9 @@
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-      "resolved": "https://registry.npmjs.org/commander/-/commander-5.1.0.tgz",
-      "integrity": "sha512-P0CysNDQ7rtVw4QIQtm+MRxV66vKFSvlsQvGYXZWR3qFU0jlMKHZZZgw8e+8DSah4UDKMqnknRDQz+xuQXQ/Zg==",
+      "version": "6.2.1",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-6.2.1.tgz",
+      "integrity": "sha512-U7VdrJFnJgo4xjrHpTzu0yrHPGImdsmD95ZlgYSEajAn2JKzDhDTPG9kBTefmObL2w/ngeZnilk+OV9CG3d7UA==",
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@@ -740,6 +739,12 @@
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       "dev": true
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+    "nanoid": {
+      "version": "3.1.23",
+      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.1.23.tgz",
+      "integrity": "sha512-FiB0kzdP0FFVGDKlRLEQ1BgDzU87dy5NnzjeW9YZNt+/c3+q82EQDUwniSAUxp/F0gFNI1ZhKU1FqYsMuqZVnw==",
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@@ -1055,15 +1060,34 @@
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-      "resolved": "https://registry.npmjs.org/purgecss/-/purgecss-2.3.0.tgz",
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+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/purgecss/-/purgecss-4.0.3.tgz",
+      "integrity": "sha512-PYOIn5ibRIP34PBU9zohUcCI09c7drPJJtTDAc0Q6QlRz2/CHQ8ywGLdE7ZhxU2VTqB7p5wkvj5Qcm05Rz3Jmw==",
       "dev": true,
       "requires": {
-        "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"
+      },
+      "dependencies": {
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+          "version": "1.2.2",
+          "resolved": "https://registry.npmjs.org/colorette/-/colorette-1.2.2.tgz",
+          "integrity": "sha512-MKGMzyfeuutC/ZJ1cba9NqcNpfeqMUcYmyF1ZFY6/Cn7CNSAKx6a+s48sqLqyAiZuaP2TcqMhoo+dlwFnVxT9w==",
+          "dev": true
+        },
+        "postcss": {
+          "version": "8.2.15",
+          "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.2.15.tgz",
+          "integrity": "sha512-2zO3b26eJD/8rb106Qu2o7Qgg52ND5HPjcyQiK2B98O388h43A448LCslC0dI2P97wCAQRJsFvwTRcXxTKds+Q==",
+          "dev": true,
+          "requires": {
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+            "nanoid": "^3.1.23",
+            "source-map": "^0.6.1"
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@@ -1238,6 +1262,16 @@
         "resolve": "^1.14.2"
       },
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+        "@fullhuman/postcss-purgecss": {
+          "version": "2.3.0",
+          "resolved": "https://registry.npmjs.org/@fullhuman/postcss-purgecss/-/postcss-purgecss-2.3.0.tgz",
+          "integrity": "sha512-qnKm5dIOyPGJ70kPZ5jiz0I9foVOic0j+cOzNDoo8KoCf6HjicIZ99UfO2OmE7vCYSKAAepEwJtNzpiiZAh9xw==",
+          "dev": true,
+          "requires": {
+            "postcss": "7.0.32",
+            "purgecss": "^2.3.0"
+          }
+        },
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           "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.2.1.tgz",
@@ -1273,6 +1307,12 @@
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           "dev": true
         },
+        "commander": {
+          "version": "5.1.0",
+          "resolved": "https://registry.npmjs.org/commander/-/commander-5.1.0.tgz",
+          "integrity": "sha512-P0CysNDQ7rtVw4QIQtm+MRxV66vKFSvlsQvGYXZWR3qFU0jlMKHZZZgw8e+8DSah4UDKMqnknRDQz+xuQXQ/Zg==",
+          "dev": true
+        },
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           "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-8.1.0.tgz",
@@ -1299,6 +1339,18 @@
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           }
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+        "purgecss": {
+          "version": "2.3.0",
+          "resolved": "https://registry.npmjs.org/purgecss/-/purgecss-2.3.0.tgz",
+          "integrity": "sha512-BE5CROfVGsx2XIhxGuZAT7rTH9lLeQx/6M0P7DTXQH4IUc3BBzs9JUzt4yzGf3JrH9enkeq6YJBe9CTtkm1WmQ==",
+          "dev": true,
+          "requires": {
+            "commander": "^5.0.0",
+            "glob": "^7.0.0",
+            "postcss": "7.0.32",
+            "postcss-selector-parser": "^6.0.2"
+          }
+        },
         "resolve": {
           "version": "1.17.0",
           "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.17.0.tgz",
diff --git a/package.json b/package.json
index 4b194dd..5bab8e1 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
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     },
     "devDependencies": {
-        "@fullhuman/postcss-purgecss": "^2.3.0",
+        "@fullhuman/postcss-purgecss": "4.0.3",
         "autoprefixer": "^9.8.6",
         "postcss": "^7.0.32",
         "postcss-cli": "^7.1.1",