diff --git a/README.md b/README.md
index 017944a..0c42f35 100644
--- a/README.md
+++ b/README.md
@@ -31,6 +31,7 @@ A curated list of tools and resources for security incident response, aimed to h
 
 ### Adversary Emulation
 
+* [Caldera](https://github.com/mitre/caldera) - an automated adversary emulation system that performs post-compromise adversarial behavior within Windows Enterprise networks. It generates plans during operation using a planning system and a pre-configured adversary model based on the Adversarial Tactics, Techniques & Common Knowledge (ATT&CK™) project.
 * [DumpsterFire](https://github.com/TryCatchHCF/DumpsterFire) - The DumpsterFire Toolset is a modular, menu-driven, cross-platform tool for building repeatable, time-delayed, distributed security events. Easily create custom event chains for Blue Team drills and sensor /   alert mapping. Red Teams can create decoy incidents, distractions, and lures to support and scale their operations.
 
 ### All in one Tools