diff --git a/build/run/bin/upgrade-postfixadmin b/build/run/bin/upgrade-postfixadmin
index 3b686a2..35477de 100755
--- a/build/run/bin/upgrade-postfixadmin
+++ b/build/run/bin/upgrade-postfixadmin
@@ -2,13 +2,16 @@
 # Installer for updating Postfixadmin
 set -e
 
+# Create temporary directory
+workdir=$(mktemp -d)
+
 # Backup postfixadmin config
-cd /tmp/
+cd ${workdir}/
 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
+mv /usr/share/webapps/postfixadmin/ /usr/share/webapps/postfixadmin.bkp/
 mkdir -p /usr/share/webapps/postfixadmin/
 tar zxf postfixadmin.tar.gz -C /usr/share/webapps/postfixadmin --strip-components 1
 
@@ -18,3 +21,10 @@ setfacl -R -m u:${MYVEMAIL_NGINX_USERGROUP}:rwx /usr/share/webapps/postfixadmin/
 
 # Return config
 mv config.local.php /usr/share/webapps/postfixadmin/
+
+# Run new install script
+cd /usr/share/webapps/postfixadmin/
+bash ./install.sh
+
+# Cleanup
+rm -r ${workdir}/ /usr/share/webapps/postfixadmin.bkp/
\ No newline at end of file