diff --git a/scripts/backup.sh b/scripts/backup.sh
new file mode 100644
index 0000000..338ef42
--- /dev/null
+++ b/scripts/backup.sh
@@ -0,0 +1,71 @@
+#!/bin/bash
+
+set -e
+
+: "${ZAMMAD_DIR:=/opt/zammad/var}"
+: "${BACKUP_DIR:=/var/tmp/zammad}"
+: "${ZAMMAD_RAILSSERVER_HOST:=zammad-railsserver}"
+: "${ZAMMAD_RAILSSERVER_PORT:=3000}"
+: "${POSTGRESQL_HOST:=zammad-postgresql}"
+: "${POSTGRESQL_PORT:=5432}"
+: "${POSTGRESQL_DB:=zammad_production}"
+
+function check_railsserver_available {
+  until (echo > "/dev/tcp/$ZAMMAD_RAILSSERVER_HOST/$ZAMMAD_RAILSSERVER_PORT") &> /dev/null; do
+    echo "waiting for railsserver to be ready..."
+    sleep 60
+  done
+}
+
+function zammad_backup {
+  TIMESTAMP="$(date +'%Y%m%d%H%M%S')"
+
+  echo "${TIMESTAMP} - backuping zammad..."
+
+  # delete old backups
+  if [ -d "${BACKUP_DIR}" ] && [ -n "$(ls "${BACKUP_DIR}")" ]; then
+# modified version: this deletes everything older than 12 hours
+     find "${BACKUP_DIR}"/*_zammad_*.gz -type f -mmin +720 -delete
+# original version of the script
+#    find "${BACKUP_DIR}"/*_zammad_*.gz -type f -mtime +"${HOLD_DAYS}" -delete
+  fi
+
+  if [ "${NO_FILE_BACKUP}" != "yes" ]; then
+    # tar files
+    tar -czf "${BACKUP_DIR}"/"${TIMESTAMP}"_zammad_files.tar.gz "${ZAMMAD_DIR}"
+  fi
+
+  #db backup
+  pg_dump --dbname=postgresql://"${POSTGRESQL_USER}:${POSTGRESQL_PASSWORD}@${POSTGRESQL_HOST}:${POSTGRESQL_PORT}/${POSTGRESQL_DB}" | gzip > "${BACKUP_DIR}"/"${TIMESTAMP}"_zammad_db.psql.gz
+
+  echo "backup finished :)"
+}
+
+if [ "$1" = 'zammad-backup' ]; then
+
+  check_railsserver_available
+
+  while true; do
+    NOW_TIMESTAMP=$(date +%s)
+    TOMORROW_DATE=$(date -d@"$((NOW_TIMESTAMP + 24*60*60))" +%Y-%m-%d)
+
+    zammad_backup
+
+    NEXT_TIMESTAMP=$(date -d "$TOMORROW_DATE $BACKUP_TIME" +%s)
+    NOW_TIMESTAMP=$(date +%s)
+
+    sleep $((NEXT_TIMESTAMP - NOW_TIMESTAMP))
+  done
+fi
+
+if [ "$1" = 'zammad-backup-once' ]; then
+  check_railsserver_available
+
+  zammad_backup
+fi
+
+if [ "$1" = 'zammad-backup-db' ]; then
+  NO_FILE_BACKUP="yes"
+
+  zammad_backup
+fi