diff --git a/.env.sample b/.env.sample
index 674444e..c2c4987 100644
--- a/.env.sample
+++ b/.env.sample
@@ -153,6 +153,9 @@ LOG_LEVEL=WARNING
 # Timezone for the Mailu containers. See this link for all possible values https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
 TZ=Etc/UTC
 
+# Authentication token for API requests
+#API_TOKEN=
+
 ###################################
 # Database settings
 ###################################
diff --git a/compose.yml b/compose.yml
index 83dbb50..7e402c0 100644
--- a/compose.yml
+++ b/compose.yml
@@ -5,6 +5,7 @@ x-environment:
   - FRONT_ADDRESS=${STACK_NAME}_app
   - ADMIN
   - ANTIVIRUS
+  - API_TOKEN
   - AUTH_RATELIMIT_IP
   - MESSAGE_RATELIMIT
   - COMPOSE_PROJECT_NAME