diff --git a/README.md b/README.md
index 7bbccdf..4c06b24 100644
--- a/README.md
+++ b/README.md
@@ -190,6 +190,7 @@ See also [Active Directory](#active-directory) and [ADFS](#adfs) below.
 - [Kubernetes Role Based Access Control Good Practices](https://kubernetes.io/docs/concepts/security/rbac-good-practices/)
 - [Kubernetes Multi-tenancy](https://kubernetes.io/docs/concepts/security/multi-tenancy/)
 - [Kubernetes blog - A Closer Look at NSA/CISA Kubernetes Hardening Guidance](https://kubernetes.io/blog/2021/10/05/nsa-cisa-kubernetes-hardening-guidance/#building-secure-container-images)
+- [ReynardSec - Docker Security – Step-by-Step Hardening (Docker Hardening)](https://reynardsec.com/en/docker-platform-security-step-by-step-hardening/) (2023)
 
 ## Services