diff --git a/roles/hedgedoc/templates/docker-compose.yaml b/roles/hedgedoc/templates/docker-compose.yaml
index 859c6f9..4c963ff 100644
--- a/roles/hedgedoc/templates/docker-compose.yaml
+++ b/roles/hedgedoc/templates/docker-compose.yaml
@@ -13,6 +13,7 @@ services:
       - DB_PASS={{ hedgedoc_secrets['mysql_root_password'] }}
       - DB_NAME=hedgedoc
       - CMD_DOMAIN=hedgedoc.{{ domain }}
+      - CMD_PROTOCOL_USESSL=true
     ports:
       - {{ ports['hedgedoc'] }}:3000
     volumes: