diff --git a/installers/docker/__lcm__.env b/installers/docker/__lcm__.env
index 762061a..b8ae0e3 100644
--- a/installers/docker/__lcm__.env
+++ b/installers/docker/__lcm__.env
@@ -15,3 +15,4 @@
 OSMLCM_VCA_SECRET=__JUJU_PASSWORD__
 OSMLCM_VCA_PUBKEY=__JUJU_PUBKEY__
 OSMLCM_VCA_APIPROXY=__JUJU_APIPROXY__
+OSMLCM_VCA_CACERT=__JUJU_CACERT__