diff --git a/package-lock.json b/package-lock.json
index 7661a8f..2c7159a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,7 +12,7 @@
         "@modelcontextprotocol/sdk": "^1.29.0",
         "commander": "^13.1.0",
         "env-paths": "^3.0.0",
-        "zod": "^3.25.0"
+        "zod": "^4.4.3"
       },
       "bin": {
         "flowclock": "dist/cli.js"
@@ -5334,9 +5334,9 @@
       }
     },
     "node_modules/zod": {
-      "version": "3.25.76",
-      "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
-      "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
+      "version": "4.4.3",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-4.4.3.tgz",
+      "integrity": "sha512-ytENFjIJFl2UwYglde2jchW2Hwm4GJFLDiSXWdTrJQBIN9Fcyp7n4DhxJEiWNAJMV1/BqWfW/kkg71UDcHJyTQ==",
       "license": "MIT",
       "funding": {
         "url": "https://github.com/sponsors/colinhacks"
diff --git a/package.json b/package.json
index a4d3776..2bbacf3 100644
--- a/package.json
+++ b/package.json
@@ -62,7 +62,7 @@
     "@modelcontextprotocol/sdk": "^1.29.0",
     "commander": "^13.1.0",
     "env-paths": "^3.0.0",
-    "zod": "^3.25.0"
+    "zod": "^4.4.3"
   },
   "overrides": {
     "hono": ">=4.12.25"