diff --git a/packages/playground/package.json b/packages/playground/package.json
index e617c927..b611a61e 100644
--- a/packages/playground/package.json
+++ b/packages/playground/package.json
@@ -46,7 +46,7 @@
     "docsify": "^4.12.2",
     "jest": "^27.5.1",
     "parcel": "^2.4.0",
-    "postcss": "^8.4.7",
+    "postcss": "^8.4.12",
     "postcss-cli": "^9.1.0",
     "tailwindcss": "^3.0.23",
     "typescript": "^4.6.3"
diff --git a/yarn.lock b/yarn.lock
index 224a792d..03d45874 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -14630,16 +14630,7 @@ postcss@^7.0.14, postcss@^7.0.26, postcss@^7.0.32, postcss@^7.0.35, postcss@^7.0
     picocolors "^0.2.1"
     source-map "^0.6.1"
 
-postcss@^8.2.15, postcss@^8.3.11, postcss@^8.3.5, postcss@^8.4.4, postcss@^8.4.6, postcss@^8.4.7:
-  version "8.4.7"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.7.tgz#f99862069ec4541de386bf57f5660a6c7a0875a8"
-  integrity sha512-L9Ye3r6hkkCeOETQX6iOaWZgjp3LL6Lpqm6EtgbKrgqGGteRMNb9vzBfRL96YOSu8o7x3MfIH9Mo5cPJFGrW6A==
-  dependencies:
-    nanoid "^3.3.1"
-    picocolors "^1.0.0"
-    source-map-js "^1.0.2"
-
-postcss@^8.4.12:
+postcss@^8.2.15, postcss@^8.3.11, postcss@^8.3.5, postcss@^8.4.12, postcss@^8.4.4, postcss@^8.4.6, postcss@^8.4.7:
   version "8.4.12"
   resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.12.tgz#1e7de78733b28970fa4743f7da6f3763648b1905"
   integrity sha512-lg6eITwYe9v6Hr5CncVbK70SoioNQIq81nsaG86ev5hAidQvmOeETBqs7jm43K2F5/Ley3ytDtriImV6TpNiSg==