diff --git a/package-lock.json b/package-lock.json
index ed95307..9270518 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -28,7 +28,7 @@
         "pino": "^10.3.1",
         "tree-sitter": "^0.21.0",
         "yaml": "^2.3.4",
-        "zod": "^3.22.4"
+        "zod": "^4.3.6"
       },
       "bin": {
         "agent-runbook-generator": "dist/cli.js"
@@ -6760,9 +6760,9 @@
       }
     },
     "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 3a178c4..9232846 100644
--- a/package.json
+++ b/package.json
@@ -119,7 +119,7 @@
     "pino": "^10.3.1",
     "tree-sitter": "^0.21.0",
     "yaml": "^2.3.4",
-    "zod": "^3.22.4"
+    "zod": "^4.3.6"
   },
   "devDependencies": {
     "@types/cli-progress": "^3.11.5",