diff --git a/config/modules.json.sample b/config/modules.json.sample
index 81aeec0d..58407f7a 100644
--- a/config/modules.json.sample
+++ b/config/modules.json.sample
@@ -94,6 +94,7 @@
     "Hashlookup": "Module to query Hashlookup (https://github.com/adulau/hashlookup-server). URL set to none means querying the public instance.",
     "FOX": "Submission only interface by and for CCCS",
     "Pandora": "Submission only interface for https://github.com/pandora-analysis/",
-    "RiskIQ": "Module to query RiskIQ (https://community.riskiq.com/)"
+    "RiskIQ": "Module to query RiskIQ (https://community.riskiq.com/)",
+    "CIRCLPDNS": "Module to query CIRCL Passive DNS (https://www.circl.lu/services/passive-dns/)"
   }
 }