diff --git a/package.json b/package.json
index 6dff7429d..7404838c9 100644
--- a/package.json
+++ b/package.json
@@ -109,7 +109,7 @@
     "parse-json": "8.3.0",
     "picocolors": "1.1.1",
     "please-upgrade-node": "3.2.0",
-    "postcss": "8.5.8",
+    "postcss": "8.5.9",
     "postcss-less": "6.0.0",
     "postcss-media-query-parser": "0.2.3",
     "postcss-scss": "4.0.9",
diff --git a/yarn.lock b/yarn.lock
index 8cedbcfd3..8ce56d317 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -8556,14 +8556,14 @@ __metadata:
   languageName: node
   linkType: hard
 
-"postcss@npm:8.5.8":
-  version: 8.5.8
-  resolution: "postcss@npm:8.5.8"
+"postcss@npm:8.5.9":
+  version: 8.5.9
+  resolution: "postcss@npm:8.5.9"
   dependencies:
     nanoid: "npm:^3.3.11"
     picocolors: "npm:^1.1.1"
     source-map-js: "npm:^1.2.1"
-  checksum: 10/cbacbfd7f767e2c820d4bf09a3a744834dd7d14f69ff08d1f57b1a7defce9ae5efcf31981890d9697a972a64e9965de677932ef28e4c8ba23a87aad45b82c459
+  checksum: 10/b34661c6efca87f7bf747c6c943435e4bfef7617a238c3719103e607c605d16720682fb121b7ebd4f7f748228dfdf8711b82f7ffed80a5c4a9249c070ed5fd87
   languageName: node
   linkType: hard
 
@@ -8705,7 +8705,7 @@ __metadata:
     parse-json: "npm:8.3.0"
     picocolors: "npm:1.1.1"
     please-upgrade-node: "npm:3.2.0"
-    postcss: "npm:8.5.8"
+    postcss: "npm:8.5.9"
     postcss-less: "npm:6.0.0"
     postcss-media-query-parser: "npm:0.2.3"
     postcss-scss: "npm:4.0.9"