diff --git a/__references/package-tester/package.json b/__references/package-tester/package.json
index 902a3e1cb8..36001bb5ee 100644
--- a/__references/package-tester/package.json
+++ b/__references/package-tester/package.json
@@ -27,7 +27,7 @@
     "eslint": "8.45.0",
     "eslint-config-next": "13.4.12",
     "next": "13.4.12",
-    "postcss": "8.4.27",
+    "postcss": "8.4.31",
     "react": "18.2.0",
     "react-dom": "18.2.0",
     "tailwindcss": "3.3.3",