diff --git a/build/run/bin/upgrade-postfixadmin b/build/run/bin/upgrade-postfixadmin
new file mode 100755
index 0000000..3b686a2
--- /dev/null
+++ b/build/run/bin/upgrade-postfixadmin
@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+# Installer for updating Postfixadmin
+set -e
+
+# Backup postfixadmin config
+cd /tmp/
+cp /usr/share/webapps/postfixadmin/config.local.php .
+rm -r /usr/share/webapps/postfixadmin/
+
+# Download latest version
+wget -q4 https://github.com/postfixadmin/postfixadmin/archive/refs/tags/$(wget -q4O- https://api.github.com/repos/postfixadmin/postfixadmin/releases/latest | grep tag_name | awk '{print $2}' | tr -d '"|,').tar.gz -O postfixadmin.tar.gz
+mkdir -p /usr/share/webapps/postfixadmin/
+tar zxf postfixadmin.tar.gz -C /usr/share/webapps/postfixadmin --strip-components 1
+
+# Create templates_c folder and set permissions
+mkdir /usr/share/webapps/postfixadmin/templates_c/
+setfacl -R -m u:${MYVEMAIL_NGINX_USERGROUP}:rwx /usr/share/webapps/postfixadmin/templates_c/
+
+# Return config
+mv config.local.php /usr/share/webapps/postfixadmin/