diff --git a/README.md b/README.md
index 10d6bdb..953a28c 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,7 @@ MISP modules support is included in MISP starting from version 2.4.X.
 ## Existing MISP modules
 
 * [DNS](modules/expansion/dns.py) - a simple module to resolve MISP attributes like hostname and domain to expand IP addresses attributes.
+* [passivetotal](modules/expansion/passivetotal.py) - a [passivetotal](https://www.passivetotal.org/) module to query the passivetotal passive DNS interface.
 
 ## How to add your own MISP modules?