diff --git a/docker-compose.yml b/docker-compose.yml
index 7206fc9f..2c3272b5 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -149,7 +149,7 @@ services:
             - sogo
 
     dovecot-mailcow:
-      image: mailcow/dovecot:1.20
+      image: mailcow/dovecot:1.21
       build: ./data/Dockerfiles/dovecot
       cap_add:
         - NET_BIND_SERVICE