diff --git a/data/Dockerfiles/dovecot/syslog-ng.conf b/data/Dockerfiles/dovecot/syslog-ng.conf
index 0257d6a1..d14c2ad1 100644
--- a/data/Dockerfiles/dovecot/syslog-ng.conf
+++ b/data/Dockerfiles/dovecot/syslog-ng.conf
@@ -20,6 +20,7 @@ destination d_redis_ui_log {
     persist-name("redis1")
     port(6379)
     command("LPUSH" "DOVECOT_MAILLOG" "$(format-json time=\"$S_UNIXTIME\" priority=\"$PRIORITY\" program=\"$PROGRAM\" message=\"$MESSAGE\")\n")
+    command("LTRIM" "DOVECOT_MAILLOG" "0" "10000")
   );
 };
 destination d_redis_f2b_channel {
diff --git a/docker-compose.yml b/docker-compose.yml
index db581750..29f1038f 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -181,7 +181,7 @@ services:
             - sogo
 
     dovecot-mailcow:
-      image: mailcow/dovecot:1.7
+      image: mailcow/dovecot:1.8
       build: ./data/Dockerfiles/dovecot
       depends_on:
         unbound-mailcow: