diff --git a/postgresql_backup/README.md b/postgresql_backup/README.md
index ddd3497..72d4e66 100644
--- a/postgresql_backup/README.md
+++ b/postgresql_backup/README.md
@@ -14,4 +14,44 @@ Example
 ```properties
 localhost:5432:*:postgres:pg_password_1
 localhost:5433:*:postgres:pg_password_2
+```
+
+## Scheduling
+
+### Systemd
+
+#### Service
+
+`/etc/systemd/system/postgresql_backup.service`
+
+```ini
+[Unit]
+Description=PostgreSQL backup Script
+
+[Service]
+Type=oneshot
+WorkingDirectory=/root/scripts/postgresql_backup
+ExecStart=/root/scripts/postgresql_backup/pg_backup.sh
+```
+
+#### Timer
+
+`/etc/systemd/system/postgresql_backup.timer`
+
+```ini
+[Unit]
+Description=Run Backup Script Every Night
+
+[Timer]
+OnCalendar=*-*-* 22:00:00
+Unit=postgresql_backup.service
+
+[Install]
+WantedBy=timers.target
+```
+
+Then:
+
+```shell
+systemctl enable postgresql_backup.timer --now
 ```
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