diff --git a/docs-src/package-lock.json b/docs-src/package-lock.json
index 1a8e4530..16c163a9 100644
--- a/docs-src/package-lock.json
+++ b/docs-src/package-lock.json
@@ -30,6 +30,7 @@
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@@ -140,6 +141,30 @@
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         "postcss": "^7.0.23",
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+          "resolved": "https://registry.npmjs.org/picocolors/-/picocolors-0.2.1.tgz",
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+          "dev": true
+        },
+        "postcss": {
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+          "resolved": "https://registry.npmjs.org/postcss/-/postcss-7.0.39.tgz",
+          "integrity": "sha512-yioayjNbHn6z1/Bywyb2Y4s3yvDAeXGOyxqD+LnVOinq6Mdmd++SW2wUNVzavyyHxd6+DxzWGIuosg6P1Rj8uA==",
+          "dev": true,
+          "requires": {
+            "picocolors": "^0.2.1",
+            "source-map": "^0.6.1"
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+        "source-map": {
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+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
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+          "dev": true
+        }
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@@ -401,6 +427,7 @@
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+      "dev": true,
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@@ -408,7 +435,8 @@
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-      "integrity": "sha1-SxQVMEz1ACjqgWQ2Q72C6gWANok="
+      "integrity": "sha1-SxQVMEz1ACjqgWQ2Q72C6gWANok=",
+      "dev": true
     },
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@@ -567,7 +595,8 @@
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-      "integrity": "sha1-G2HAViGQqN/2rjuyzwIAyhMLhtQ="
+      "integrity": "sha1-G2HAViGQqN/2rjuyzwIAyhMLhtQ=",
+      "dev": true
     },
     "esprima": {
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@@ -894,7 +923,8 @@
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       "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
-      "integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0="
+      "integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0=",
+      "dev": true
     },
     "has-value": {
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@@ -1304,6 +1334,11 @@
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       "optional": true
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+    "nanoid": {
+      "version": "3.3.6",
+      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.6.tgz",
+      "integrity": "sha512-BGcqMMJuToF7i1rt+2PWSNVnWIkGCU78jBG3RxO/bZlnZPK2Cmi2QaffxGO/2RvWi9sL+FAiRiXMgsyxQ1DIDA=="
+    },
     "nanomatch": {
       "version": "1.2.13",
       "resolved": "https://registry.npmjs.org/nanomatch/-/nanomatch-1.2.13.tgz",
@@ -1563,6 +1598,11 @@
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       }
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+    "picocolors": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/picocolors/-/picocolors-1.0.0.tgz",
+      "integrity": "sha512-1fygroTLlHu66zi26VoTDv8yRgm0Fccecssto+MhsZ0D/DGW2sm8E8AjW7NU5VVTRt5GxbeZ5qBuJr+HyLYkjQ=="
+    },
     "pify": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/pify/-/pify-3.0.0.tgz",
@@ -1576,28 +1616,13 @@
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-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-7.0.24.tgz",
-      "integrity": "sha512-Xl0XvdNWg+CblAXzNvbSOUvgJXwSjmbAKORqyw9V2AlHrm1js2gFw9y3jibBAhpKZi8b5JzJCVh/FyzPsTtgTA==",
+      "version": "8.4.31",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.31.tgz",
+      "integrity": "sha512-PS08Iboia9mts/2ygV3eLpY5ghnUcfLV/EXTOW1E2qYxJKGGBUtNjN76FYHnMs36RmARn41bC0AZmn+rR0OVpQ==",
       "requires": {
-        "chalk": "^2.4.2",
-        "source-map": "^0.6.1",
-        "supports-color": "^6.1.0"
-      },
-      "dependencies": {
-        "source-map": {
-          "version": "0.6.1",
-          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
-          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g=="
-        },
-        "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==",
-          "requires": {
-            "has-flag": "^3.0.0"
-          }
-        }
+        "nanoid": "^3.3.6",
+        "picocolors": "^1.0.0",
+        "source-map-js": "^1.0.2"
       }
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     "postcss-cli": {
@@ -2021,6 +2046,11 @@
       "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=",
       "dev": true
     },
+    "source-map-js": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/source-map-js/-/source-map-js-1.0.2.tgz",
+      "integrity": "sha512-R0XvVJ9WusLiqTCEiGCmICCMplcCkIwwR11mOSD9CR5u+IXYdiseeEuXCVAjS54zqwkLcPNnmU4OeJ6tUrWhDw=="
+    },
     "source-map-resolve": {
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       "resolved": "https://registry.npmjs.org/source-map-resolve/-/source-map-resolve-0.5.3.tgz",
@@ -2114,6 +2144,7 @@
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       "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
+      "dev": true,
       "requires": {
         "has-flag": "^3.0.0"
       }
@@ -2310,12 +2341,6 @@
       "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
       "dev": true
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-    "y18n": {
-      "version": "5.0.5",
-      "resolved": "https://registry.npmjs.org/y18n/-/y18n-5.0.5.tgz",
-      "integrity": "sha1-bRX7qITAhnnA136I53WegR4H+kE=",
-      "dev": true
-    },
     "yargs": {
       "version": "11.1.1",
       "resolved": "https://registry.npmjs.org/yargs/-/yargs-11.1.1.tgz",
@@ -2334,6 +2359,14 @@
         "which-module": "^2.0.0",
         "y18n": "^3.2.1",
         "yargs-parser": "^9.0.2"
+      },
+      "dependencies": {
+        "y18n": {
+          "version": "3.2.2",
+          "resolved": "https://registry.npmjs.org/y18n/-/y18n-3.2.2.tgz",
+          "integrity": "sha512-uGZHXkHnhF0XeeAPgnKfPv1bgKAYyVvmNL1xlKsPYZPaIHxGti2hHqvOCQv71XMsLxu1QjergkqogUnms5D3YQ==",
+          "dev": true
+        }
       }
     },
     "yargs-parser": {
diff --git a/docs-src/package.json b/docs-src/package.json
index 06470334..e1875e51 100644
--- a/docs-src/package.json
+++ b/docs-src/package.json
@@ -18,7 +18,7 @@
   "homepage": "https://github.com/bep/tech-doc-hugo#readme",
   "dependencies": {
     "node": "^12.13.0",
-    "postcss": "^7.0.24"
+    "postcss": "^8.4.31"
   },
   "devDependencies": {
     "autoprefixer": "^9.7.3",