diff --git a/docker/swarm/stack/monitoring/alerta.yml b/docker/swarm/stack/monitoring/alerta.yml
index 0470a09..bec608c 100644
--- a/docker/swarm/stack/monitoring/alerta.yml
+++ b/docker/swarm/stack/monitoring/alerta.yml
@@ -27,6 +27,7 @@
                 - ${prometheus:alerta:config_dir}/alerta.conf:/web/config.js
                 - ${prometheus:alerta:config_dir}/alertad.conf:/app/alertad.conf
               environment:
+                ADMIN_KEY: ${_param:alerta_admin_key}
                 ADMIN_USERS: ${_param:alerta_admin_username}
                 ADMIN_PASSWORD_FILE: "/run/secrets/alerta"
                 AUTH_REQUIRED: "True"