diff --git a/legacy/typescript/package-lock.json b/legacy/typescript/package-lock.json
index 327b36a..31d99b5 100644
--- a/legacy/typescript/package-lock.json
+++ b/legacy/typescript/package-lock.json
@@ -18,7 +18,7 @@
         "node-fetch": "^3.3.2",
         "opik": "^1.6.8",
         "yargs": "^17.7.2",
-        "zod": "^3.24.2"
+        "zod": "^4.4.3"
       },
       "bin": {
         "opik-mcp": "build/cli.js"
@@ -9712,10 +9712,9 @@
       }
     },
     "node_modules/zod": {
-      "version": "3.25.76",
-      "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
-      "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
-      "license": "MIT",
+      "version": "4.4.3",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-4.4.3.tgz",
+      "integrity": "sha512-ytENFjIJFl2UwYglde2jchW2Hwm4GJFLDiSXWdTrJQBIN9Fcyp7n4DhxJEiWNAJMV1/BqWfW/kkg71UDcHJyTQ==",
       "funding": {
         "url": "https://github.com/sponsors/colinhacks"
       }
@@ -16028,9 +16027,9 @@
       "dev": true
     },
     "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=="
     }
   }
 }
diff --git a/legacy/typescript/package.json b/legacy/typescript/package.json
index 1c83038..2fe5245 100644
--- a/legacy/typescript/package.json
+++ b/legacy/typescript/package.json
@@ -46,7 +46,7 @@
     "@modelcontextprotocol/sdk": "^1.26.0",
     "opik": "^1.6.8",
     "yargs": "^17.7.2",
-    "zod": "^3.24.2"
+    "zod": "^4.4.3"
   },
   "devDependencies": {
     "@jest/globals": "^30.2.0",