diff --git a/CICD/heat/gc_HOT.yaml b/CICD/heat/gc_HOT.yaml
index 41512a4d8c3cd16728e47a91e2fc61971c62c993..bc920e5d6a9bf75201873a459bb8c826033008d0 100644
--- a/CICD/heat/gc_HOT.yaml
+++ b/CICD/heat/gc_HOT.yaml
@@ -225,7 +225,7 @@ resources:
       security_groups: [ default, { get_resource: SSHMonashSecGroup }, { get_resource: SlurmSecGroup }, { get_resource: NFSSecGroup } ]
       metadata:
        ansible_host_groups: [ ComputeNodes ]
-       ansible_ssh_user: ec2-user
+       ansible_ssh_user: ubuntu
        project_name: { get_param: project_name }
       networks:
        - network: { get_param: NetID }