diff --git a/doc/package-lock.json b/doc/package-lock.json
index fe0beb60983..2d89a1848dd 100644
--- a/doc/package-lock.json
+++ b/doc/package-lock.json
@@ -6,7 +6,7 @@
     "": {
       "devDependencies": {
         "autoprefixer": "^10.4.27",
-        "postcss": "^8.5.8",
+        "postcss": "^8.5.9",
         "postcss-cli": "^11.0.1"
       }
     },
@@ -508,9 +508,9 @@
       }
     },
     "node_modules/postcss": {
-      "version": "8.5.8",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.8.tgz",
-      "integrity": "sha512-OW/rX8O/jXnm82Ey1k44pObPtdblfiuWnrd8X7GJ7emImCOstunGbXUpp7HdBrFQX6rJzn3sPT397Wp5aCwCHg==",
+      "version": "8.5.9",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.9.tgz",
+      "integrity": "sha512-7a70Nsot+EMX9fFU3064K/kdHWZqGVY+BADLyXc8Dfv+mTLLVl6JzJpPaCZ2kQL9gIJvKXSLMHhqdRRjwQeFtw==",
       "dev": true,
       "funding": [
         {
diff --git a/doc/package.json b/doc/package.json
index 7de69848294..8de4e3cc3cb 100644
--- a/doc/package.json
+++ b/doc/package.json
@@ -1,7 +1,7 @@
 {
   "devDependencies": {
     "autoprefixer": "^10.4.27",
-    "postcss": "^8.5.8",
+    "postcss": "^8.5.9",
     "postcss-cli": "^11.0.1"
   }
 }