Azure released 1.13 to Azure Kubernetes Service last week! This also means that if you are running 1.9 – you have 30 days to upgrade to a newer version. Learn more here: https://azure.microsoft.com/en-us/updates/azure-kubernetes-service-kubernetes-1-9-end-of-life-notice/.

Learn more about AKS support for 1.13 here: https://github.com/Azure/AKS/releases.