diff --git a/package-lock.json b/package-lock.json
index c7ca6a1..7eed414 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -40,7 +40,7 @@
         "mkdirp": "^3.0.1",
         "ordered-read-streams": "^2.0.0",
         "plugin-error": "^2.0.1",
-        "postcss": "^8.5.8",
+        "postcss": "^8.5.9",
         "postcss-calc": "^10.1.1",
         "postcss-custom-properties": "^15.0.1",
         "postcss-import": "^16.1.1",
@@ -8408,9 +8408,9 @@
       }
     },
     "node_modules/postcss": {
-      "version": "8.5.8",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.8.tgz",
-      "integrity": "sha512-OW/rX8O/jXnm82Ey1k44pObPtdblfiuWnrd8X7GJ7emImCOstunGbXUpp7HdBrFQX6rJzn3sPT397Wp5aCwCHg==",
+      "version": "8.5.9",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.9.tgz",
+      "integrity": "sha512-7a70Nsot+EMX9fFU3064K/kdHWZqGVY+BADLyXc8Dfv+mTLLVl6JzJpPaCZ2kQL9gIJvKXSLMHhqdRRjwQeFtw==",
       "funding": [
         {
           "type": "opencollective",
diff --git a/package.json b/package.json
index e9abd70..392da77 100644
--- a/package.json
+++ b/package.json
@@ -60,7 +60,7 @@
     "mkdirp": "^3.0.1",
     "ordered-read-streams": "^2.0.0",
     "plugin-error": "^2.0.1",
-    "postcss": "^8.5.8",
+    "postcss": "^8.5.9",
     "postcss-calc": "^10.1.1",
     "postcss-custom-properties": "^15.0.1",
     "postcss-import": "^16.1.1",