diff --git a/package.json b/package.json
index 7267a59..60ad896 100644
--- a/package.json
+++ b/package.json
@@ -41,7 +41,7 @@
     "parcel": "2.0.0-beta.3.1",
     "parcel-plugin-bundle-visualiser": "1.2.0",
     "percy": "0.28.7",
-    "postcss": "8.4.18",
+    "postcss": "8.4.21",
     "postcss-cli": "9.1.0",
     "posthtml-expressions": "1.9.0",
     "posthtml-include": "1.7.4",