diff --git a/CHANGELOG.md b/CHANGELOG.md
index af3fb068ee..3c53ff8e27 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -25,6 +25,29 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 | Vault Helper|                    | `0.9.13` |
 | Etcd        |                    | `3.2.25` |
 
+## [0.5.1]: 0.5.0 - 2018-12-04
+
+Release to update default Kubernetes version to 1.11.4: CVE-2018-1002105: proxy
+request handling in kube-apiserver can leave vulnerable TCP connections
+([details](https://github.com/kubernetes/kubernetes/issues/71411)).
+
+### Changed
+
+* Update default kubernetes version for new clusters to 1.11.5 (#645, [@JoshVanL](https://github.com/JoshVanL))
+
+### Versions
+
+| Application | Supported versions | Default  |
+|-------------|-------------------:|---------:|
+| Packer      |                    | `1.0.2`  |
+| Terraform   |                    | `0.11.8` |
+| Consul      |                    | `1.2.3`  |
+| Vault       |                    | `0.9.5`  |
+| Kubernetes  | `>= 1.9 && < 1.13` | `1.11.5` |
+| Calico      |                    | `3.1.4`  |
+| Vault Helper|                    | `0.9.13` |
+| Etcd        |                    | `3.2.25` |
+
 
 ## [0.5.0]: 0.5.0 - 2018-11-26
 
@@ -289,6 +312,7 @@ This detailed changes have happend since the last minor version of Tarmak:
 | Vault       |                    | `0.7.3`  |
 | Kubernetes  | `>= 1.5 && < 1.8`  | `1.7.7`  |
 
+[0.5.1]: https://github.com/jetstack/tarmak/compare/0.5.0...0.5.1
 [0.5.0]: https://github.com/jetstack/tarmak/compare/0.4.1...0.5.0
 [0.4.1]: https://github.com/jetstack/tarmak/compare/0.4.0...0.4.1
 [0.4.0]: https://github.com/jetstack/tarmak/compare/0.3.0...0.4.0
diff --git a/README.md b/README.md
index bbc0ec2129..5cc57037fe 100644
--- a/README.md
+++ b/README.md
@@ -20,8 +20,8 @@ including Terraform, Puppet and systemd.
 Get a ready built version of tarmak from [the releases
 page](https://github.com/jetstack/tarmak/releases):
 
-    $ wget https://github.com/jetstack/tarmak/releases/download/0.5.0/tarmak_0.5.0_linux_amd64
-    $ mv tarmak_0.5.0_linux_amd64 tarmak
+    $ wget https://github.com/jetstack/tarmak/releases/download/0.5.1/tarmak_0.5.1_linux_amd64
+    $ mv tarmak_0.5.1_linux_amd64 tarmak
     $ chmod +x tarmak
 
 If you want compile from source, follow the [build
diff --git a/terraform/amazon/modules/bastion/templates/bastion_user_data.yaml b/terraform/amazon/modules/bastion/templates/bastion_user_data.yaml
index b0df862ee8..6337d7ddb2 100644
--- a/terraform/amazon/modules/bastion/templates/bastion_user_data.yaml
+++ b/terraform/amazon/modules/bastion/templates/bastion_user_data.yaml
@@ -58,7 +58,7 @@ write_files:
     [Service]
     Environment=AIRWORTHY_VERSION=0.2.0
     Environment=AIRWORTHY_HASH=2d69cfe0b92f86481805c28d0b8ae47a8ffa6bb2373217e7c5215d61fc9efa1d
-    Environment=WING_VERSION=0.5.0
+    Environment=WING_VERSION=0.5.1
     Environment=WING_DATA_DIR=/var/lib/wing
     PermissionsStartOnly=true
     Restart=on-failure
diff --git a/terraform/amazon/templates/puppet_agent_user_data.yaml.template b/terraform/amazon/templates/puppet_agent_user_data.yaml.template
index 3e6dde7391..7298ff8c32 100644
--- a/terraform/amazon/templates/puppet_agent_user_data.yaml.template
+++ b/terraform/amazon/templates/puppet_agent_user_data.yaml.template
@@ -24,7 +24,7 @@ write_files:
 {{- else }}
     Environment=AIRWORTHY_VERSION=0.2.0
     Environment=AIRWORTHY_HASH=2d69cfe0b92f86481805c28d0b8ae47a8ffa6bb2373217e7c5215d61fc9efa1d
-    Environment=WING_VERSION=0.5.0
+    Environment=WING_VERSION=0.5.1
     ExecStartPre=/bin/sh -c '\
       set -e ;\
       test -x /opt/wing-$${WING_VERSION}/wing && exit 0 ;\