diff --git a/Dockerfile b/Dockerfile
index 67255e6..017c209 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -23,4 +23,4 @@ WORKDIR /
 
 RUN apk del tar gcc make g++ openldap-dev
 
-EXPOSE 2121
+EXPOSE 21
diff --git a/rootfs/etc/confd/templates/proftpd.conf.tmpl b/rootfs/etc/confd/templates/proftpd.conf.tmpl
index ba2f7fb..f0c89dc 100644
--- a/rootfs/etc/confd/templates/proftpd.conf.tmpl
+++ b/rootfs/etc/confd/templates/proftpd.conf.tmpl
@@ -1,7 +1,7 @@
 ServerName "{{getenv "SERVER_NAME"}}"
 ServerType standalone
 DefaultServer on
-Port 2121
+Port 21
 UseIPv6 off
 Umask 022
 MaxInstances 30
diff --git a/rootfs/etc/services.d/proftpd/run b/rootfs/etc/services.d/proftpd/run
index e89b766..baf408e 100644
--- a/rootfs/etc/services.d/proftpd/run
+++ b/rootfs/etc/services.d/proftpd/run
@@ -1,3 +1,3 @@
 #!/usr/bin/with-contenv sh
 
-exec s6-setuidgid proftp proftpd --nodaemon
+exec proftpd --nodaemon