diff --git a/deploy/roles/mailserver/templates/docker-compose.yml.j2 b/deploy/roles/mailserver/templates/docker-compose.yml.j2
index e0b6fd7..d4ce7d7 100644
--- a/deploy/roles/mailserver/templates/docker-compose.yml.j2
+++ b/deploy/roles/mailserver/templates/docker-compose.yml.j2
@@ -125,6 +125,7 @@ services:
       DBPASS: {{ DB_PASSWORD }}
       SMTPHOST: smtp
       DOMAIN: {{ DOMAIN }}
+      ENCRYPTION: "dovecot:MD5-CRYPT"
     labels:
       - "traefik.frontend.rule=Host:admin.{{ DOMAIN }}"
       - "traefik.port=8888"