diff --git a/package.json b/package.json
index 3c3856105a..9c9ec9c91d 100644
--- a/package.json
+++ b/package.json
@@ -114,7 +114,7 @@
     "micromark-extension-frontmatter": "^1.0.0",
     "micromark-extension-gfm": "2.0.1",
     "micromark-extension-mdxjs": "^1.0.0",
-    "postcss": "^8.4.12",
+    "postcss": "^8.4.31",
     "postcss-flexbugs-fixes": "^5.0.2",
     "postcss-loader": "^7.3.3",
     "postcss-preset-env": "^7.4.4",
diff --git a/yarn.lock b/yarn.lock
index 3b2943ea0c..0d64ce7737 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -15753,10 +15753,10 @@ postcss@8.4.14:
     picocolors "^1.0.0"
     source-map-js "^1.0.2"
 
-postcss@^8.2.14, postcss@^8.4.12, postcss@^8.4.21, postcss@^8.4.25:
-  version "8.4.26"
-  resolved "https://registry.npmjs.org/postcss/-/postcss-8.4.26.tgz#1bc62ab19f8e1e5463d98cf74af39702a00a9e94"
-  integrity sha512-jrXHFF8iTloAenySjM/ob3gSj7pCu0Ji49hnjqzsgSRa50hkWCKD0HQ+gMNJkW38jBI68MpAAg7ZWwHwX8NMMw==
+postcss@^8.2.14, postcss@^8.4.21, postcss@^8.4.25, postcss@^8.4.31:
+  version "8.4.31"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.31.tgz#92b451050a9f914da6755af352bdc0192508656d"
+  integrity sha512-PS08Iboia9mts/2ygV3eLpY5ghnUcfLV/EXTOW1E2qYxJKGGBUtNjN76FYHnMs36RmARn41bC0AZmn+rR0OVpQ==
   dependencies:
     nanoid "^3.3.6"
     picocolors "^1.0.0"