diff --git a/CICD/heat/gc_HOT.yaml b/CICD/heat/gc_HOT.yaml
index 423cc50c391574669fc81924a8434ab768a0380c..f9922decedf4aff988b30ef566e7c1c8c10a878b 100644
--- a/CICD/heat/gc_HOT.yaml
+++ b/CICD/heat/gc_HOT.yaml
@@ -73,7 +73,7 @@ resources:
     security_groups: [ { get_param: SSHMonashSecGroupID }, { get_param: SlurmSecGroupID }, { get_param: MySQLSecGroupID }, { get_param: NFSSecGroupID } ]
     metadata:
      ansible_host_groups: [ SQLNodes, NFSNodes ]
-     ansible_ssh_user: ubuntu
+     ansible_ssh_user: ec2-user
      project_name: { get_param: project_name }
     networks:
       - network: { get_param: NetID }