diff --git a/templates/docker-compose.yml b/templates/docker-compose.yml
index e8b5718..40cf1b1 100644
--- a/templates/docker-compose.yml
+++ b/templates/docker-compose.yml
@@ -1,7 +1,5 @@
 # {{ ansible_managed }}
 
-version: '3.1'
-
 services:
   discourse:
     image: {{ docker_discourse_image_version }}
@@ -91,6 +89,9 @@ services:
       - DISCOURSE_SMTP_USER={{ docker_discourse_smtp_user }}
       - DISCOURSE_SMTP_PASSWORD={{ docker_discourse_smtp_password }}
       - DISCOURSE_SMTP_PROTOCOL={{ docker_discourse_smtp_protocol }}
+      - DISCOURSE_SMTP_AUTH={{ docker_discourse_smtp_auth }}
+      - DISCOURSE_SMTP_OPEN_TIMEOUT={{ docker_discourse_smtp_open_timeout }}
+      - DISCOURSE_SMTP_READ_TIMEOUT={{ docker_discourse_smtp_read_timeout }}
     networks:
       - discourse
       - traefik