diff --git a/build/run/bin/upgrade-postfixadmin b/build/run/bin/upgrade-postfixadmin
index 3b686a2..3f361af 100755
--- a/build/run/bin/upgrade-postfixadmin
+++ b/build/run/bin/upgrade-postfixadmin
@@ -2,8 +2,11 @@
 # 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/
 
@@ -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/
+
+# Reload installer
+cd /usr/share/webapps/postfixadmin/
+sh install.sh
+
+# Cleanup
+rm -r ${workdir}/
\ No newline at end of file