diff --git a/composer.json b/composer.json
index 434d5c7..afbb365 100644
--- a/composer.json
+++ b/composer.json
@@ -2,7 +2,7 @@
     "name": "wildlink/wildlink-api-php",
     "description": "A simple PHP interface for the Wildlink API (learn more at https://www.wildlink.me/)",
     "license": "MIT",
-    "version": "1.1.8",
+    "version": "1.1.9",
     "type": "library",
     "authors": [
         {
diff --git a/src/WildlinkApi/WildlinkClient.php b/src/WildlinkApi/WildlinkClient.php
index fa34090..8f4b8e2 100644
--- a/src/WildlinkApi/WildlinkClient.php
+++ b/src/WildlinkApi/WildlinkClient.php
@@ -502,7 +502,7 @@ public function addConceptToList($application_id = '', $concept_id = '')
     {
         $result = $this->request('addConceptToList', [
             'application_id' => $application_id,
-            'post_obj' => (object) ['ConceptID' => $concept_id]
+            'post_obj' => (object) ['ApplicationID' => $application_id, 'ConceptID' => $concept_id]
         ]);
         return $result;
     }