diff --git a/README.md b/README.md
index fcc3df8e3..de7ef1585 100644
--- a/README.md
+++ b/README.md
@@ -83,6 +83,7 @@ security/crowdsec -- Lightweight and collaborative security engine
 security/etpro-telemetry -- ET Pro Telemetry Edition
 security/intrusion-detection-content-et-open -- IDS Proofpoint full ET open ruleset complementary subset for ET Pro Telemetry edition
 security/intrusion-detection-content-et-pro -- IDS Proofpoint ET Pro ruleset (needs a valid subscription)
+security/intrusion-detection-content-pt-open -- IDS Positive Technologies ESC ruleset
 security/intrusion-detection-content-snort-vrt -- IDS Snort VRT ruleset (needs registration or subscription)
 security/maltrail -- Malicious traffic detection system
 security/openconnect -- OpenConnect Client