diff --git a/package-lock.json b/package-lock.json
index 1b495cc36..d11b3f32d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11933,9 +11933,9 @@
       }
     },
     "node_modules/postcss": {
-      "version": "8.4.49",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.49.tgz",
-      "integrity": "sha512-OCVPnIObs4N29kxTjzLfUryOkvZEq+pf8jTF0lg8E7uETuWHA+v7j3c/xJmiqpX450191LlmZfUKkXxkTry7nA==",
+      "version": "8.5.1",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.1.tgz",
+      "integrity": "sha512-6oz2beyjc5VMn/KV1pPw8fliQkhBXrVn1Z3TVyqZxU8kZpzEKhBdmCFqI6ZbmGtamQvQGuU1sgPTk8ZrXDD7jQ==",
       "funding": [
         {
           "type": "opencollective",
@@ -11951,7 +11951,7 @@
         }
       ],
       "dependencies": {
-        "nanoid": "^3.3.7",
+        "nanoid": "^3.3.8",
         "picocolors": "^1.1.1",
         "source-map-js": "^1.2.1"
       },
@@ -16972,7 +16972,7 @@
         "markdown-it": "^14.1.0",
         "msw": "^2.7.0",
         "openapi-typescript": "^7.5.2",
-        "postcss": "^8.4.49",
+        "postcss": "^8.5.1",
         "postcss-html": "^1.7.0",
         "sass": "^1.83.1",
         "shiki": "^1.26.1",
diff --git a/packages/kuma-gui/package.json b/packages/kuma-gui/package.json
index a04275d0a..7fe953a17 100644
--- a/packages/kuma-gui/package.json
+++ b/packages/kuma-gui/package.json
@@ -60,7 +60,7 @@
     "lockfile-lint": "^4.14.0",
     "markdown-it": "^14.1.0",
     "msw": "^2.7.0",
-    "postcss": "^8.4.49",
+    "postcss": "^8.5.1",
     "openapi-typescript": "^7.5.2",
     "postcss-html": "^1.7.0",
     "sass": "^1.83.1",