diff --git a/README.md b/README.md
index c1bc7a0..cbf9550 100644
--- a/README.md
+++ b/README.md
@@ -37,6 +37,7 @@ For more information: [Extending MISP with Python modules](https://www.circl.lu/
 * [passivetotal](misp_modules/modules/expansion/passivetotal.py) - a [passivetotal](https://www.passivetotal.org/) module that queries a number of different PassiveTotal datasets.
 * [rbl](misp_modules/modules/expansion/rbl.py) - a module to get RBL (Real-Time Blackhost List) values from an attribute.
 * [reversedns](misp_modules/modules/expansion/reversedns.py) - Simple Reverse DNS expansion service to resolve reverse DNS from MISP attributes.
+* [securitytrails](misp_modules/modules/expansion/securitytrails.py) - an expansion module for [securitytrails](https://securitytrails.com/).
 * [shodan](misp_modules/modules/expansion/shodan.py) - a minimal [shodan](https://www.shodan.io/) expansion module.
 * [Sigma queries](misp_modules/modules/expansion/sigma_queries.py) - Experimental expansion module querying a sigma rule to convert it into all the available SIEM signatures.
 * [Sigma syntax validator](misp_modules/modules/expansion/sigma_syntax_validator.py) - Sigma syntax validator.