diff --git a/package-lock.json b/package-lock.json
index 72d89f2..105d4e6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,7 +10,7 @@
       "license": "ISC",
       "devDependencies": {
         "autoprefixer": "^10.4.0",
-        "postcss": "^8.4.23",
+        "postcss": "^8.4.28",
         "postcss-cli": "^10.0.0"
       }
     },
@@ -603,9 +603,9 @@
       }
     },
     "node_modules/postcss": {
-      "version": "8.4.23",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.23.tgz",
-      "integrity": "sha512-bQ3qMcpF6A/YjR55xtoTr0jGOlnPOKAIMdOWiv0EIT6HVPEaJiJB4NLljSbiHoC2RX7DN5Uvjtpbg1NPdwv1oA==",
+      "version": "8.4.28",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.28.tgz",
+      "integrity": "sha512-Z7V5j0cq8oEKyejIKfpD8b4eBy9cwW2JWPk0+fB1HOAMsfHbnAXLLS+PfVWlzMSLQaWttKDt607I0XHmpE67Vw==",
       "dev": true,
       "funding": [
         {
@@ -1373,9 +1373,9 @@
       "dev": true
     },
     "postcss": {
-      "version": "8.4.23",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.23.tgz",
-      "integrity": "sha512-bQ3qMcpF6A/YjR55xtoTr0jGOlnPOKAIMdOWiv0EIT6HVPEaJiJB4NLljSbiHoC2RX7DN5Uvjtpbg1NPdwv1oA==",
+      "version": "8.4.28",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.28.tgz",
+      "integrity": "sha512-Z7V5j0cq8oEKyejIKfpD8b4eBy9cwW2JWPk0+fB1HOAMsfHbnAXLLS+PfVWlzMSLQaWttKDt607I0XHmpE67Vw==",
       "dev": true,
       "requires": {
         "nanoid": "^3.3.6",
diff --git a/package.json b/package.json
index 54901ce..2039709 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": "^8.4.23",
+    "postcss": "^8.4.28",
     "postcss-cli": "^10.0.0"
   }
 }