diff --git a/modules/api-server/demo-app/package-lock.json b/modules/api-server/demo-app/package-lock.json
index 0769111..ecc1061 100644
--- a/modules/api-server/demo-app/package-lock.json
+++ b/modules/api-server/demo-app/package-lock.json
@@ -56,7 +56,7 @@
         "tailwind-merge": "^2.6.0",
         "tailwindcss-animate": "^1.0.7",
         "vaul": "^1.0.0",
-        "zod": "^3.25.76"
+        "zod": "^4.0.0"
       },
       "devDependencies": {
         "@eslint/js": "^9.32.0",
@@ -6955,9 +6955,9 @@
       }
     },
     "node_modules/zod": {
-      "version": "3.25.76",
-      "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
-      "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
+      "version": "4.3.6",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-4.3.6.tgz",
+      "integrity": "sha512-rftlrkhHZOcjDwkGlnUtZZkvaPHCsDATp4pGpuOOMDaTdDDXF91wuVDJoWoPsKX/3YPQ5fHuF3STjcYyKr+Qhg==",
       "license": "MIT",
       "funding": {
         "url": "https://github.com/sponsors/colinhacks"
diff --git a/modules/api-server/demo-app/package.json b/modules/api-server/demo-app/package.json
index 33103c8..0eba8f1 100644
--- a/modules/api-server/demo-app/package.json
+++ b/modules/api-server/demo-app/package.json
@@ -59,7 +59,7 @@
     "tailwind-merge": "^2.6.0",
     "tailwindcss-animate": "^1.0.7",
     "vaul": "^1.0.0",
-    "zod": "^3.25.76"
+    "zod": "^4.0.0"
   },
   "devDependencies": {
     "@eslint/js": "^9.32.0",