diff --git a/compose.yml b/compose.yml
index 75ecb4e..5b2c8ed 100644
--- a/compose.yml
+++ b/compose.yml
@@ -46,6 +46,7 @@ services:
       - PEERTUBE_LIVE_CHAT_ENABLED
       - PEERTUBE_REDIS_HOSTNAME=cache
       - PEERTUBE_SIGNUP_ENABLED
+      - PEERTUBE_SMTP_ENABLED
       - PEERTUBE_TRANSCODING_ENABLED
       - PEERTUBE_TRUST_PROXY=["127.0.0.1", "loopback", "172.16.0.0/12", "10.0.0.0/8"]
       - PEERTUBE_WEBSERVER_HOSTNAME=${DOMAIN}