diff --git a/package-lock.json b/package-lock.json
index 232c240..be889ca 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -31,35 +31,12 @@
       }
     },
     "@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==",
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/@fullhuman/postcss-purgecss/-/postcss-purgecss-4.0.3.tgz",
+      "integrity": "sha512-/EnQ9UDWGGqHkn1UKAwSgh+gJHPKmD+Z+5dQ4gWT4qq2NUyez3zqAfZNwFH3eSgmgO+wjTXfhlLchx2M9/K+7Q==",
       "dev": true,
       "requires": {
-        "postcss": "7.0.32",
-        "purgecss": "^2.3.0"
-      },
-      "dependencies": {
-        "postcss": {
-          "version": "7.0.32",
-          "resolved": "https://registry.npmjs.org/postcss/-/postcss-7.0.32.tgz",
-          "integrity": "sha512-03eXong5NLnNCD05xscnGKGDZ98CyzoqPSMjOe6SuoQY7Z2hIj0Ld1g/O/UQRuOle2aRtiIRDg9tDcTGAkLfKw==",
-          "dev": true,
-          "requires": {
-            "chalk": "^2.4.2",
-            "source-map": "^0.6.1",
-            "supports-color": "^6.1.0"
-          }
-        },
-        "supports-color": {
-          "version": "6.1.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-6.1.0.tgz",
-          "integrity": "sha512-qe1jfm1Mg7Nq/NSh6XE24gPXROEVsWHxC1LIx//XNlD9iw7YZQGjZNjYN7xGaEG6iKdA8EtNFW6R0gjnVXp+wQ==",
-          "dev": true,
-          "requires": {
-            "has-flag": "^3.0.0"
-          }
-        }
+        "purgecss": "^4.0.3"
       }
     },
     "@nodelib/fs.scandir": {
@@ -422,9 +399,9 @@
       "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==",
+      "version": "6.2.1",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-6.2.1.tgz",
+      "integrity": "sha512-U7VdrJFnJgo4xjrHpTzu0yrHPGImdsmD95ZlgYSEajAn2JKzDhDTPG9kBTefmObL2w/ngeZnilk+OV9CG3d7UA==",
       "dev": true
     },
     "concat-map": {
@@ -717,12 +694,6 @@
         "resolve-from": "^3.0.0"
       }
     },
-    "indexes-of": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/indexes-of/-/indexes-of-1.0.1.tgz",
-      "integrity": "sha1-8w9xbI4r00bHtn0985FVZqfAVgc=",
-      "dev": true
-    },
     "inflight": {
       "version": "1.0.6",
       "resolved": "https://registry.npmjs.org/inflight/-/inflight-1.0.6.tgz",
@@ -1308,14 +1279,13 @@
       }
     },
     "postcss-selector-parser": {
-      "version": "6.0.2",
-      "resolved": "https://registry.npmjs.org/postcss-selector-parser/-/postcss-selector-parser-6.0.2.tgz",
-      "integrity": "sha512-36P2QR59jDTOAiIkqEprfJDsoNrvwFei3eCqKd1Y0tUsBimsq39BLp7RD+JWny3WgB1zGhJX8XVePwm9k4wdBg==",
+      "version": "6.0.6",
+      "resolved": "https://registry.npmjs.org/postcss-selector-parser/-/postcss-selector-parser-6.0.6.tgz",
+      "integrity": "sha512-9LXrvaaX3+mcv5xkg5kFwqSzSH1JIObIx51PrndZwlmznwXRfxMddDvo9gve3gVR8ZTKgoFDdWkbRFmEhT4PMg==",
       "dev": true,
       "requires": {
         "cssesc": "^3.0.0",
-        "indexes-of": "^1.0.1",
-        "uniq": "^1.0.1"
+        "util-deprecate": "^1.0.2"
       }
     },
     "postcss-value-parser": {
@@ -1331,37 +1301,15 @@
       "dev": true
     },
     "purgecss": {
-      "version": "2.3.0",
-      "resolved": "https://registry.npmjs.org/purgecss/-/purgecss-2.3.0.tgz",
-      "integrity": "sha512-BE5CROfVGsx2XIhxGuZAT7rTH9lLeQx/6M0P7DTXQH4IUc3BBzs9JUzt4yzGf3JrH9enkeq6YJBe9CTtkm1WmQ==",
+      "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": {
-        "postcss": {
-          "version": "7.0.32",
-          "resolved": "https://registry.npmjs.org/postcss/-/postcss-7.0.32.tgz",
-          "integrity": "sha512-03eXong5NLnNCD05xscnGKGDZ98CyzoqPSMjOe6SuoQY7Z2hIj0Ld1g/O/UQRuOle2aRtiIRDg9tDcTGAkLfKw==",
-          "dev": true,
-          "requires": {
-            "chalk": "^2.4.2",
-            "source-map": "^0.6.1",
-            "supports-color": "^6.1.0"
-          }
-        },
-        "supports-color": {
-          "version": "6.1.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-6.1.0.tgz",
-          "integrity": "sha512-qe1jfm1Mg7Nq/NSh6XE24gPXROEVsWHxC1LIx//XNlD9iw7YZQGjZNjYN7xGaEG6iKdA8EtNFW6R0gjnVXp+wQ==",
-          "dev": true,
-          "requires": {
-            "has-flag": "^3.0.0"
-          }
-        }
       }
     },
     "quick-lru": {
@@ -1874,12 +1822,6 @@
         "is-number": "^7.0.0"
       }
     },
-    "uniq": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/uniq/-/uniq-1.0.1.tgz",
-      "integrity": "sha1-sxxa6CVIRKOoKBVBzisEuGWnNP8=",
-      "dev": true
-    },
     "universalify": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/universalify/-/universalify-1.0.0.tgz",
diff --git a/package.json b/package.json
index 699b8c9..bae56f3 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
         "start": "hugo --gc"
     },
     "devDependencies": {
-        "@fullhuman/postcss-purgecss": "2.3.0",
+        "@fullhuman/postcss-purgecss": "4.0.3",
         "autoprefixer": "9.8.6",
         "postcss": "8.3.6",
         "postcss-cli": "7.1.1",