diff --git a/package-lock.json b/package-lock.json
index 1ac193a..7bb9128 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,7 +10,7 @@
       "license": "ISC",
       "devDependencies": {
         "autoprefixer": "^10.4.0",
-        "postcss": "^8.3.7",
+        "postcss": "^8.4.21",
         "postcss-cli": "^9.0.2"
       }
     },
@@ -566,9 +566,9 @@
       }
     },
     "node_modules/nanoid": {
-      "version": "3.1.30",
-      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.1.30.tgz",
-      "integrity": "sha512-zJpuPDwOv8D2zq2WRoMe1HsfZthVewpel9CAvTfc/2mBD1uUT/agc5f7GHGWXlYkFvi1mVxe4IjvP2HNrop7nQ==",
+      "version": "3.3.4",
+      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.4.tgz",
+      "integrity": "sha512-MqBkQh/OHTS2egovRtLk45wEyNXwF+cokD+1YPf9u5VfJiRdAiRwB2froX5Co9Rh20xs4siNPm8naNotSD6RBw==",
       "dev": true,
       "bin": {
         "nanoid": "bin/nanoid.cjs"
@@ -638,21 +638,27 @@
       }
     },
     "node_modules/postcss": {
-      "version": "8.4.0",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.0.tgz",
-      "integrity": "sha512-BRMNx3Wy7UI89jN8H4ZVS5lQMPM2OSMkOkvDCSjwXa7PWTs24k7Lm55NXLbMbs070LvraXaxN5l1npSOS6wMVw==",
+      "version": "8.4.21",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.21.tgz",
+      "integrity": "sha512-tP7u/Sn/dVxK2NnruI4H9BG+x+Wxz6oeZ1cJ8P6G/PZY0IKk4k/63TDsQf2kQq3+qoJeLm2kIBUNlZe3zgb4Zg==",
       "dev": true,
+      "funding": [
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/postcss/"
+        },
+        {
+          "type": "tidelift",
+          "url": "https://tidelift.com/funding/github/npm/postcss"
+        }
+      ],
       "dependencies": {
-        "nanoid": "^3.1.30",
+        "nanoid": "^3.3.4",
         "picocolors": "^1.0.0",
-        "source-map-js": "^1.0.1"
+        "source-map-js": "^1.0.2"
       },
       "engines": {
         "node": "^10 || ^12 || >=14"
-      },
-      "funding": {
-        "type": "opencollective",
-        "url": "https://opencollective.com/postcss/"
       }
     },
     "node_modules/postcss-cli": {
@@ -854,9 +860,9 @@
       }
     },
     "node_modules/source-map-js": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/source-map-js/-/source-map-js-1.0.1.tgz",
-      "integrity": "sha512-4+TN2b3tqOCd/kaGRJ/sTYA0tR0mdXx26ipdolxcwtJVqEnqNYvlCAt1q3ypy4QMlYus+Zh34RNtYLoq2oQ4IA==",
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/source-map-js/-/source-map-js-1.0.2.tgz",
+      "integrity": "sha512-R0XvVJ9WusLiqTCEiGCmICCMplcCkIwwR11mOSD9CR5u+IXYdiseeEuXCVAjS54zqwkLcPNnmU4OeJ6tUrWhDw==",
       "dev": true,
       "engines": {
         "node": ">=0.10.0"
@@ -1372,9 +1378,9 @@
       }
     },
     "nanoid": {
-      "version": "3.1.30",
-      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.1.30.tgz",
-      "integrity": "sha512-zJpuPDwOv8D2zq2WRoMe1HsfZthVewpel9CAvTfc/2mBD1uUT/agc5f7GHGWXlYkFvi1mVxe4IjvP2HNrop7nQ==",
+      "version": "3.3.4",
+      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.4.tgz",
+      "integrity": "sha512-MqBkQh/OHTS2egovRtLk45wEyNXwF+cokD+1YPf9u5VfJiRdAiRwB2froX5Co9Rh20xs4siNPm8naNotSD6RBw==",
       "dev": true
     },
     "node-releases": {
@@ -1420,14 +1426,14 @@
       "dev": true
     },
     "postcss": {
-      "version": "8.4.0",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.0.tgz",
-      "integrity": "sha512-BRMNx3Wy7UI89jN8H4ZVS5lQMPM2OSMkOkvDCSjwXa7PWTs24k7Lm55NXLbMbs070LvraXaxN5l1npSOS6wMVw==",
+      "version": "8.4.21",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.21.tgz",
+      "integrity": "sha512-tP7u/Sn/dVxK2NnruI4H9BG+x+Wxz6oeZ1cJ8P6G/PZY0IKk4k/63TDsQf2kQq3+qoJeLm2kIBUNlZe3zgb4Zg==",
       "dev": true,
       "requires": {
-        "nanoid": "^3.1.30",
+        "nanoid": "^3.3.4",
         "picocolors": "^1.0.0",
-        "source-map-js": "^1.0.1"
+        "source-map-js": "^1.0.2"
       }
     },
     "postcss-cli": {
@@ -1545,9 +1551,9 @@
       "dev": true
     },
     "source-map-js": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/source-map-js/-/source-map-js-1.0.1.tgz",
-      "integrity": "sha512-4+TN2b3tqOCd/kaGRJ/sTYA0tR0mdXx26ipdolxcwtJVqEnqNYvlCAt1q3ypy4QMlYus+Zh34RNtYLoq2oQ4IA==",
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/source-map-js/-/source-map-js-1.0.2.tgz",
+      "integrity": "sha512-R0XvVJ9WusLiqTCEiGCmICCMplcCkIwwR11mOSD9CR5u+IXYdiseeEuXCVAjS54zqwkLcPNnmU4OeJ6tUrWhDw==",
       "dev": true
     },
     "string-width": {
diff --git a/package.json b/package.json
index 960eee9..475b1ee 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
   "homepage": "https://github.com/google/docsy-example#readme",
   "devDependencies": {
     "autoprefixer": "^10.4.0",
-    "postcss": "^8.3.7",
+    "postcss": "^8.4.21",
     "postcss-cli": "^9.0.2"
   }
 }