diff --git a/cortex/connector/src/main/scala/org/thp/thehive/connector/cortex/services/JobSrv.scala b/cortex/connector/src/main/scala/org/thp/thehive/connector/cortex/services/JobSrv.scala
index 55d98220ef..74b25092f9 100644
--- a/cortex/connector/src/main/scala/org/thp/thehive/connector/cortex/services/JobSrv.scala
+++ b/cortex/connector/src/main/scala/org/thp/thehive/connector/cortex/services/JobSrv.scala
@@ -327,7 +327,7 @@ object JobOps {
         .domainMap {
           case (job, observablesWithLink) =>
             val observables = observablesWithLink.map {
-              case (obs, l) => obs -> Json.obj("observableId" -> l)
+              case (obs, l) => obs -> Json.obj("observableId" -> l.headOption)
             }
             RichJob(job, observables)
         }