diff --git a/data/Dockerfiles/postfix/Dockerfile b/data/Dockerfiles/postfix/Dockerfile
index 56b274aa..e3c64987 100644
--- a/data/Dockerfiles/postfix/Dockerfile
+++ b/data/Dockerfiles/postfix/Dockerfile
@@ -1,4 +1,4 @@
-FROM debian:buster-slim
+FROM debian:bullseye-slim
 LABEL maintainer "Andre Peters <andre.peters@servercow.de>"
 
 ARG DEBIAN_FRONTEND=noninteractive
diff --git a/data/Dockerfiles/postfix/syslog-ng-redis_slave.conf b/data/Dockerfiles/postfix/syslog-ng-redis_slave.conf
index 40fb1cda..558305ec 100644
--- a/data/Dockerfiles/postfix/syslog-ng-redis_slave.conf
+++ b/data/Dockerfiles/postfix/syslog-ng-redis_slave.conf
@@ -1,4 +1,4 @@
-@version: 3.19
+@version: 3.28
 @include "scl.conf"
 options {
   chain_hostnames(off);
diff --git a/data/Dockerfiles/postfix/syslog-ng.conf b/data/Dockerfiles/postfix/syslog-ng.conf
index 8fdc104e..a1ccd07e 100644
--- a/data/Dockerfiles/postfix/syslog-ng.conf
+++ b/data/Dockerfiles/postfix/syslog-ng.conf
@@ -1,4 +1,4 @@
-@version: 3.19
+@version: 3.28
 @include "scl.conf"
 options {
   chain_hostnames(off);
diff --git a/docker-compose.yml b/docker-compose.yml
index 711f3c05..8606eb35 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -293,7 +293,7 @@ services:
             - dovecot
 
     postfix-mailcow:
-      image: mailcow/postfix:1.66
+      image: mailcow/postfix:1.67
       depends_on:
         - mysql-mailcow
       volumes: