diff --git a/host/client_app/package.json b/host/client_app/package.json
index 11474b16..65a8ad0e 100644
--- a/host/client_app/package.json
+++ b/host/client_app/package.json
@@ -43,7 +43,7 @@
     "@types/react-dom": "^19.0.0",
     "@vitejs/plugin-react": "^5.0.0",
     "autoprefixer": "^10.4.0",
-    "postcss": "^8.4.0",
+    "postcss": "^8.5.12",
     "rollup-plugin-visualizer": "~5.12.0",
     "tailwindcss": "^4.0.0",
     "typescript": "^5.7.0",
diff --git a/package-lock.json b/package-lock.json
index a1743fe7..f4fa4fee 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -58,13 +58,42 @@
         "@types/react-dom": "^19.0.0",
         "@vitejs/plugin-react": "^5.0.0",
         "autoprefixer": "^10.4.0",
-        "postcss": "^8.4.0",
+        "postcss": "^8.5.12",
         "rollup-plugin-visualizer": "~5.12.0",
         "tailwindcss": "^4.0.0",
         "typescript": "^5.7.0",
         "vite": "^8.0.8"
       }
     },
+    "host/client_app/node_modules/postcss": {
+      "version": "8.5.12",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.12.tgz",
+      "integrity": "sha512-W62t/Se6rA0Az3DfCL0AqJwXuKwBeYg6nOaIgzP+xZ7N5BFCI7DYi1qs6ygUYT6rvfi6t9k65UMLJC+PHZpDAA==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/postcss/"
+        },
+        {
+          "type": "tidelift",
+          "url": "https://tidelift.com/funding/github/npm/postcss"
+        },
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/ai"
+        }
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "nanoid": "^3.3.11",
+        "picocolors": "^1.1.1",
+        "source-map-js": "^1.2.1"
+      },
+      "engines": {
+        "node": "^10 || ^12 || >=14"
+      }
+    },
     "modules/auth": {
       "name": "@simple-module-py/auth",
       "version": "0.1.0",