diff --git a/README.md b/README.md
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+++ b/README.md
@@ -23,6 +23,7 @@ A list of free cloud native security learning labs. Includes CTF, self-hosted wo
 | [Bustakube](https://www.bustakube.com/)    | Kubernetes | Self-hosted, import VMs|  [Jay Beale](https://twitter.com/jaybeale) | Vulnerable K8S cluster, Download the VMs to build cluster and import into VMWare, run it |
 | [Kubernetes Goat](https://github.com/madhuakula/kubernetes-goat)    | Kubernetes | Self-hosted, multi-cloud, K3S|  [Madhu Akula](https://twitter.com/madhuakula) | Create and host in your own cloud account (GKE, EKS, AKS) or K3S and attack, has a guided workbook |
 | [Kubecon NA 2019 CTF](https://securekubernetes.com/)    | Kubernetes | Self-hosted in GKE|  Multiple | Create GCP account, has a guided workbook with two attack and defense scenarios plus bonus challenges|
+| [Contained.af](https://contained.af/)    | Container | Author-hosted Challenge|  [Jessie Frazelle](https://twitter.com/jessfraz) | A container escape challenge, break out of it and email the author|