diff --git a/ansible/group_vars/all.yml b/ansible/group_vars/all.yml
index 1e59d9d4e6..afc557c2ab 100644
--- a/ansible/group_vars/all.yml
+++ b/ansible/group_vars/all.yml
@@ -346,6 +346,7 @@ nova_spicehtml5proxy_listen_port: "{{ nova_spicehtml5proxy_port }}"
 nova_serialproxy_fqdn: "{{ kolla_external_fqdn }}"
 nova_serialproxy_port: "6083"
 nova_serialproxy_listen_port: "{{ nova_serialproxy_port }}"
+nova_serialproxy_protocol: "{{ 'wss' if kolla_enable_tls_external | bool else 'ws' }}"
 
 octavia_internal_fqdn: "{{ kolla_internal_fqdn }}"
 octavia_external_fqdn: "{{ kolla_external_fqdn }}"
diff --git a/ansible/roles/nova/templates/nova.conf.j2 b/ansible/roles/nova/templates/nova.conf.j2
index 47770893c1..ed6e73c758 100644
--- a/ansible/roles/nova/templates/nova.conf.j2
+++ b/ansible/roles/nova/templates/nova.conf.j2
@@ -97,7 +97,7 @@ enabled = false
 {% if enable_nova_serialconsole_proxy | bool %}
 [serial_console]
 enabled = true
-base_url = ws://{{ nova_serialproxy_fqdn }}:{{ nova_serialproxy_port }}/
+base_url = {{ nova_serialproxy_protocol }}://{{ nova_serialproxy_fqdn }}:{{ nova_serialproxy_port }}/
 serialproxy_host = {{ api_interface_address }}
 serialproxy_port = {{ nova_serialproxy_listen_port }}
 proxyclient_address = {{ api_interface_address }}