diff --git a/package.json b/package.json
index 2cfb5311e..3867c6811 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "dayjs": "^1.11.21",
     "google-palette": "^1.1.1",
     "highlight.js": "^11.11.1",
-    "postcss": "^8.5.20",
+    "postcss": "^8.5.21",
     "postcss-cli": "^11.0.1",
     "postcss-import": "^16.1.1",
     "postcss-nesting": "^14.0.0",
diff --git a/yarn.lock b/yarn.lock
index 8f3254911..942188fbc 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -931,10 +931,10 @@ postcss-value-parser@^4.0.0, postcss-value-parser@^4.2.0:
   resolved "https://registry.npmjs.org/postcss-value-parser/-/postcss-value-parser-4.2.0.tgz"
   integrity sha512-1NNCs6uurfkVbeXG4S8JFT9t19m45ICnif8zWLd5oPSZ50QnwMfK+H3jv408d4jw/7Bttv5axS5IiHoLaVNHeQ==
 
-postcss@^8.5.16, postcss@^8.5.20:
-  version "8.5.20"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.5.20.tgz#316a139da79484ce55969fa7bb6f2f1abcc14060"
-  integrity sha512-lW616l85ucIQL+FocMmL7pQFPqBmwejrCMg+iPxyImlrANNJG9NHq/RkyCZopDhd8C3LA03PHRJDjkbGu8vvug==
+postcss@^8.5.16, postcss@^8.5.21:
+  version "8.5.21"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.5.21.tgz#47a779bd831733ff620e608d233b195ee1e7d66c"
+  integrity sha512-v4sDNP3fdNiWMfabO7OwOQdOX8TiQSztKyT1Wj0w+j7LDallJThJRBBBmzVGyYj0crMh7jlV4zepPkiNu9UwDQ==
   dependencies:
     nanoid "^3.3.16"
     picocolors "^1.1.1"