diff --git a/README.md b/README.md
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@@ -588,6 +588,7 @@ performance of any of your sites from across the globe.
:small_orange_diamond: OpenBSD - multi-platform 4.4BSD-based UNIX-like operating system.
:small_orange_diamond: HardenedBSD - HardenedBSD aims to implement innovative exploit mitigation and security solutions.
:small_orange_diamond: Kali Linux - Linux distribution used for Penetration Testing, Ethical Hacking and network security assessments.
+ :small_orange_diamond: Pentoo - is a security-focused livecd based on Gentoo.
:small_orange_diamond: Backbox Linux - penetration test and security assessment oriented Ubuntu-based Linux distribution.
:small_orange_diamond: BlackArch - is an Arch Linux-based penetration testing distribution for penetration testers and security researchers.
:small_orange_diamond: Security Onion - Linux distro for intrusion detection, enterprise security monitoring, and log management.