diff --git a/package-lock.json b/package-lock.json
index a49ff9e..71cbc1f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4886,9 +4886,9 @@
       }
     },
     "node_modules/zod": {
-      "version": "4.3.6",
-      "resolved": "https://registry.npmjs.org/zod/-/zod-4.3.6.tgz",
-      "integrity": "sha512-rftlrkhHZOcjDwkGlnUtZZkvaPHCsDATp4pGpuOOMDaTdDDXF91wuVDJoWoPsKX/3YPQ5fHuF3STjcYyKr+Qhg==",
+      "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"
@@ -4939,7 +4939,7 @@
       "dependencies": {
         "@deplens/core": "1.0.9",
         "@modelcontextprotocol/sdk": "^1.29.0",
-        "zod": "^3.25.0"
+        "zod": "^4.4.3"
       },
       "bin": {
         "deplens-mcp": "bin/deplens-mcp.js"
@@ -4947,15 +4947,6 @@
       "engines": {
         "node": ">=22"
       }
-    },
-    "packages/mcp/node_modules/zod": {
-      "version": "3.25.76",
-      "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
-      "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
-      "license": "MIT",
-      "funding": {
-        "url": "https://github.com/sponsors/colinhacks"
-      }
     }
   }
 }
diff --git a/packages/mcp/package.json b/packages/mcp/package.json
index 810ddf8..41c7e6a 100644
--- a/packages/mcp/package.json
+++ b/packages/mcp/package.json
@@ -32,7 +32,7 @@
   "dependencies": {
     "@deplens/core": "1.0.9",
     "@modelcontextprotocol/sdk": "^1.29.0",
-    "zod": "^3.25.0"
+    "zod": "^4.4.3"
   },
   "keywords": [
     "mcp",