diff --git a/test/interop/ts/package-lock.json b/test/interop/ts/package-lock.json
index 98a0ca48..96e96774 100644
--- a/test/interop/ts/package-lock.json
+++ b/test/interop/ts/package-lock.json
@@ -10,7 +10,7 @@
       "dependencies": {
         "@modelcontextprotocol/sdk": "1.30.0",
         "express": "^5.2.1",
-        "zod": "^4.4.3"
+        "zod": "^4.5.4"
       },
       "devDependencies": {
         "@eslint/js": "^10.0.1",
@@ -2585,9 +2585,9 @@
       }
     },
     "node_modules/zod": {
-      "version": "4.4.3",
-      "resolved": "https://registry.npmjs.org/zod/-/zod-4.4.3.tgz",
-      "integrity": "sha512-ytENFjIJFl2UwYglde2jchW2Hwm4GJFLDiSXWdTrJQBIN9Fcyp7n4DhxJEiWNAJMV1/BqWfW/kkg71UDcHJyTQ==",
+      "version": "4.5.4",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-4.5.4.tgz",
+      "integrity": "sha512-sC95tT5iHHH9gtpj6A81kh+NEaRAUFN+qlUPDUbRfOMvNf5QCBqsb3WgvnpVtK5Y+4UfA6KqufotuTvMGiTlsA==",
       "license": "MIT",
       "funding": {
         "url": "https://github.com/sponsors/colinhacks"
diff --git a/test/interop/ts/package.json b/test/interop/ts/package.json
index 8ae4d551..c2fc5f86 100644
--- a/test/interop/ts/package.json
+++ b/test/interop/ts/package.json
@@ -14,7 +14,7 @@
   "dependencies": {
     "@modelcontextprotocol/sdk": "1.30.0",
     "express": "^5.2.1",
-    "zod": "^4.4.3"
+    "zod": "^4.5.4"
   },
   "devDependencies": {
     "@eslint/js": "^10.0.1",