diff --git a/cmd/lk/testdata/echo-agent-node/package.json b/cmd/lk/testdata/echo-agent-node/package.json
index d6770dd3..1e25d174 100644
--- a/cmd/lk/testdata/echo-agent-node/package.json
+++ b/cmd/lk/testdata/echo-agent-node/package.json
@@ -7,6 +7,6 @@
     "@livekit/agents": "^1.4.9",
     "@livekit/rtc-node": "^0.13.29",
     "dotenv": "^16.4.5",
-    "zod": "^3.25.76"
+    "zod": "^4.0.0"
   }
 }