# Upgrade OpManager Monitoring Agent

Regular agent upgrades keep your monitoring setup stable and secure. OpManager can upgrade agents automatically, or you can run controlled upgrades for a single agent or in bulk.

- [Auto Upgrade](https://www.manageengine.com/network-monitoring/help/agent-upgrade.html#auto-upgrade)
- [Manual Upgrade](https://www.manageengine.com/network-monitoring/help/agent-upgrade.html#manual-upgrade)
- [Unix Agent Upgrade](https://www.manageengine.com/network-monitoring/help/agent-upgrade.html#unix-agent-upgrade)

## Auto Upgrade

To enable or disable auto upgrade, go to **Settings → Discovery → Deploy Agent → Agent Settings**.

![Agent Auto Upgrade | ManageEngine OpManager](https://cdn.manageengine.com/sites/meweb/images/network-monitoring/images/agent_auto_upgrade.png)

It is recommended to keep **Agent Auto Upgrade** enabled. When OpManager is upgraded, agents are upgraded to the compatible version automatically, provided the agent upgrade files are available.

## Manual Upgrade

If your environment follows a Change Request (CR) or Request for Change (RFC) process, disable Agent Auto Upgrade and start the upgrade manually from the UI for a single agent or multiple agents in bulk.

1. Go to **Settings → ITOM Agents → Monitoring Agents**.
2. Select the agents you want to upgrade.
3. Click **Actions → Upgrade**.

![Agent Manual Upgrade | ManageEngine OpManager](https://cdn.manageengine.com/sites/meweb/images/network-monitoring/images/agent_upgrade.png)

**Note:**

- The **Upgrade** option is enabled only for agents in **Clear** status, meaning they are communicating properly with OpManager.
- Versions marked as **Mandatory Upgrade** are applied to all agents automatically, even when Agent Auto Upgrade is disabled, as they may contain security fixes.

## Unix Agent Upgrade

Unix agents need the upgrade files for the new version. How you get them depends on your Internet access.

- **With Internet access:** After OpManager restarts, the files are downloaded automatically from the [ManageEngine website](https://www.manageengine.com/network-monitoring/unix-agent-download.html). No further action is needed.
- **Without Internet access:** Download the Unix agent file for your OpManager version from the [ManageEngine website](https://www.manageengine.com/network-monitoring/unix-agent-download.html). Then follow the [manual installation steps](https://www.manageengine.com/network-monitoring/help/agent-installation.html#manual) or the instructions on the **Deploy Agent** page (**Settings → Discovery → Deploy Agent**).