diff --git a/docker-compose.yml b/docker-compose.yml
index fe9bfa79..9ebf0470 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -333,7 +333,7 @@ services:
     acme-mailcow:
       depends_on:
         - nginx-mailcow
-      image: mailcow/acme:1.65
+      image: mailcow/acme:1.66
       dns:
         - ${IPV4_NETWORK:-172.22.1}.254
       environment: