diff --git a/package-lock.json b/package-lock.json
index fb53a33..6f86443 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -15,7 +15,7 @@
         "express": "^5.0.0",
         "js-yaml": "^4.1.1",
         "jsonwebtoken": "^9.0.2",
-        "zod": "^3.22.4"
+        "zod": "^4.0.0"
       },
       "devDependencies": {
         "@types/express": "^5.0.0",
@@ -1324,9 +1324,9 @@
       }
     },
     "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/package.json b/package.json
index d271428..d97e269 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
     "express": "^5.0.0",
     "js-yaml": "^4.1.1",
     "jsonwebtoken": "^9.0.2",
-    "zod": "^3.22.4"
+    "zod": "^4.0.0"
   },
   "devDependencies": {
     "@types/express": "^5.0.0",