diff --git a/elements/threat-actor-tools.json b/elements/threat-actor-tools.json
index 4193d927..fc9a8b4a 100644
--- a/elements/threat-actor-tools.json
+++ b/elements/threat-actor-tools.json
@@ -443,7 +443,7 @@
     },
     {
       "value": "Helminth backdoor",
-      "refs": ["http://researchcenter.paloaltonetworks.com/2016/05/the-oilrig-campaign-attacks-on-saudi-arabian-organizations-deliver-helminth-backdoor/"],
+      "refs": ["http://researchcenter.paloaltonetworks.com/2016/05/the-oilrig-campaign-attacks-on-saudi-arabian-organizations-deliver-helminth-backdoor/"]
     }
   ],
   "version" : 1,