# Upgrade an existing Redis Enterprise Software deployment

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To upgrade Redis Enterprise Software:

1. Verify appropriate [network ports](https://redis.io/docs/latest/operate/rs/networking/port-configurations) are either open or used by Redis Enterprise Software.

1. [Upgrade the software on all nodes of the cluster.](https://redis.io/docs/latest/operate/rs/installing-upgrading/upgrading/upgrade-cluster)

2. _(Optional)_ [Upgrade each database](https://redis.io/docs/latest/operate/rs/installing-upgrading/upgrading/upgrade-database) in the cluster or [upgrade an Active-Active database](https://redis.io/docs/latest/operate/rs/installing-upgrading/upgrading/upgrade-active-active) to enable new features and important fixes.