diff --git a/README.md b/README.md
index da7fec2..731ec34 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ Typhoon distributes upstream Kubernetes, architectural conventions, and cluster
 
 ## Features <a href="https://www.cncf.io/certification/software-conformance/"><img align="right" src="https://storage.googleapis.com/poseidon/certified-kubernetes.png"></a>
 
-* Kubernetes v1.11.3 (upstream, via [kubernetes-incubator/bootkube](https://github.com/kubernetes-incubator/bootkube))
+* Kubernetes v1.12.1 (upstream, via [kubernetes-incubator/bootkube](https://github.com/kubernetes-incubator/bootkube))
 * Single or multi-master, workloads isolated on workers, [Calico](https://www.projectcalico.org/) or [flannel](https://github.com/coreos/flannel) networking
 * On-cluster etcd with TLS, [RBAC](https://kubernetes.io/docs/admin/authorization/rbac/)-enabled, [network policy](https://kubernetes.io/docs/concepts/services-networking/network-policies/)
 * Ready for Ingress, Prometheus, Grafana, and other optional [addons](https://typhoon.psdn.io/addons/overview/)
diff --git a/bootkube.tf b/bootkube.tf
index 42be39a..d9e9eb9 100644
--- a/bootkube.tf
+++ b/bootkube.tf
@@ -1,6 +1,6 @@
 # Self-hosted Kubernetes assets (kubeconfig, manifests)
 module "bootkube" {
-  source = "git::https://github.com/poseidon/terraform-render-bootkube.git?ref=2437023c1050609b749850e9b2301a6f00713680"
+  source = "git::https://github.com/poseidon/terraform-render-bootkube.git?ref=81f19507faabf411db9c760d55f3d03f7d78f4c9"
 
   cluster_name          = "${var.cluster_name}"
   api_servers           = ["${format("%s.%s", var.cluster_name, var.dns_zone)}"]
diff --git a/cl/controller.yaml.tmpl b/cl/controller.yaml.tmpl
index dace74a..8bdedc5 100644
--- a/cl/controller.yaml.tmpl
+++ b/cl/controller.yaml.tmpl
@@ -123,7 +123,7 @@ storage:
       contents:
         inline: |
           KUBELET_IMAGE_URL=docker://k8s.gcr.io/hyperkube
-          KUBELET_IMAGE_TAG=v1.11.3
+          KUBELET_IMAGE_TAG=v1.12.1
     - path: /etc/sysctl.d/max-user-watches.conf
       filesystem: root
       contents:
diff --git a/workers/cl/worker.yaml.tmpl b/workers/cl/worker.yaml.tmpl
index 6f74d03..534bdbe 100644
--- a/workers/cl/worker.yaml.tmpl
+++ b/workers/cl/worker.yaml.tmpl
@@ -93,7 +93,7 @@ storage:
       contents:
         inline: |
           KUBELET_IMAGE_URL=docker://k8s.gcr.io/hyperkube
-          KUBELET_IMAGE_TAG=v1.11.3
+          KUBELET_IMAGE_TAG=v1.12.1
     - path: /etc/sysctl.d/max-user-watches.conf
       filesystem: root
       contents:
@@ -111,7 +111,7 @@ storage:
             --volume config,kind=host,source=/etc/kubernetes \
             --mount volume=config,target=/etc/kubernetes \
             --insecure-options=image \
-            docker://k8s.gcr.io/hyperkube:v1.11.3 \
+            docker://k8s.gcr.io/hyperkube:v1.12.1 \
             --net=host \
             --dns=host \
             --exec=/kubectl -- --kubeconfig=/etc/kubernetes/kubeconfig delete node $(hostname)