diff --git a/web/app/package.json b/web/app/package.json
index 67ce9b52..f3b741ae 100644
--- a/web/app/package.json
+++ b/web/app/package.json
@@ -47,7 +47,7 @@
     "fake-indexeddb": "6.2.5",
     "jsdom": "28.0.0",
     "knip": "5.83.0",
-    "postcss": "8.5.3",
+    "postcss": "8.5.18",
     "prettier": "3.5.3",
     "prettier-plugin-tailwindcss": "0.6.11",
     "tailwindcss": "4.1.3",