diff --git a/compose.yml b/compose.yml
index 6695e44..f3146ce 100644
--- a/compose.yml
+++ b/compose.yml
@@ -26,6 +26,7 @@ services:
       - GITEA_ENABLE_NOTIFY_MAIL
       - GITEA_ENABLE_OPENID_SIGNIN
       - GITEA_ENABLE_OPENID_SIGNUP
+      - GITEA_SMTP_MAILER_ENABLED
       - GITEA_SSH_PORT
     volumes:
       - data:/var/lib/gitea