diff --git a/applications/ray/TPU_guide.md b/applications/ray/TPU_guide.md
index 29fa5b9e8..62f92451e 100644
--- a/applications/ray/TPU_guide.md
+++ b/applications/ray/TPU_guide.md
@@ -38,7 +38,7 @@ accelerator_type       = "nvidia-tesla-t4"
 
 ### Installing the TPU Initialization Webhook
 
-The TPU Initialization Webhook automatically injects the `TPU_WORKER_ID`, `TPU_NAME`, and `TPU_WORKER_HOSTNAMES` environment variables necessary for multi-host TPU clusters. The webhook needs to be installed once per GKE cluster. The instructions can be found [here](https://github.com/GoogleCloudPlatform/ai-on-gke/blob/main/applications/ray/kuberay-tpu-webhook).
+The TPU Initialization Webhook automatically injects the `TPU_WORKER_ID`, `TPU_NAME`, and `TPU_WORKER_HOSTNAMES` environment variables necessary for multi-host TPU clusters. The webhook needs to be installed once per GKE cluster and requires a Kuberay Operator running v1.1 and GKE cluster version of 1.28+. The instructions can be found [here](https://github.com/GoogleCloudPlatform/ai-on-gke/blob/main/applications/ray/kuberay-tpu-webhook).
 
 ### Creating the Kuberay Cluster