diff --git a/docker-compose.yml b/docker-compose.yml
index cf2566e..ca39f1b 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -141,6 +141,7 @@ services:
       - LETSENCRYPT_EMAIL=${LETSENCRYPT_EMAIL:-internal}
       - PROMETHEUS_HOSTNAME=${PROMETHEUS_HOSTNAME}
       - GRAFANA_HOSTNAME=${GRAFANA_HOSTNAME}
+      - LETTA_HOSTNAME=${LETTA_HOSTNAME}
       - PROMETHEUS_USERNAME=${PROMETHEUS_USERNAME}
       - PROMETHEUS_PASSWORD_HASH=${PROMETHEUS_PASSWORD_HASH}
       - SEARXNG_USERNAME=${SEARXNG_USERNAME}