---
title: "9.0.x to 9.0.3 Upgrade Procedure"
canonical: "https://docs.infoblox.com/space/niosupgrade/1320387191/9.0.x%20to%209.0.3%20Upgrade%20Procedure"
format: markdown
---
To upgrade NIOS, perform the following steps:

1. [Download the new upgrade software](https://infoblox-docs.atlassian.net/wiki/spaces/niosupgrade/pages/1320387344).
2. [Upload the upgrade software to the Grid Master](https://infoblox-docs.atlassian.net/wiki/spaces/niosupgrade/pages/1320387480).
3. [Distribute the software upgrade files](https://infoblox-docs.atlassian.net/wiki/spaces/niosupgrade/pages/1320419945).
4. [Apply the 9.0.3.3 CHF 3 hotfix](https://infoblox-docs.atlassian.net/wiki/spaces/niosupgrade/pages/1321042299).
5. [Test the upgrade](https://infoblox-docs.atlassian.net/wiki/spaces/niosupgrade/pages/1321042374).
6. [Perform the actual upgrade](https://infoblox-docs.atlassian.net/wiki/spaces/niosupgrade/pages/1321042346).