diff --git a/packages/bin/remark42-bin/DEBBUILD b/packages/bin/remark42-bin/DEBBUILD
index 5fc6b45..abc64f0 100644
--- a/packages/bin/remark42-bin/DEBBUILD
+++ b/packages/bin/remark42-bin/DEBBUILD
@@ -2,7 +2,7 @@
 
 pkgname="remark42"
 pkgver=1.12.0
-pkgrel=2
+pkgrel=3
 arch="amd64"
 pkgcommit=""
 section="utils"
@@ -28,7 +28,8 @@ function package {
 
 function debian_postinst {
     cat << EOF
+#!/usr/bin/env bash
 touch /etc/default/remark42
-useradd --system remark42
+adduser --system remark42
 EOF
 }