diff --git a/roles/juju-setup/templates/environments.yaml.j2 b/roles/juju-setup/templates/environments.yaml.j2
index 5828766..519adaf 100644
--- a/roles/juju-setup/templates/environments.yaml.j2
+++ b/roles/juju-setup/templates/environments.yaml.j2
@@ -5,3 +5,6 @@
         bootstrap-host: juju.{{ site_suffix }}
         bootstrap-user: ubuntu
         default-series: {{ ansible_distribution_release }}
+        enable-os-refresh-update: false
+        enable-os-upgrade: false
+