# Managing Packages

*[Documentation index](/llms.txt) · [Full index](/llms-full.txt)*

Learn how to manage Move packages on Sui.

:::caution Package security

An upgradeable package's `UpgradeCap` controls all of its future behavior, so treat package management as a security-sensitive activity. Verify the exact package IDs of your dependencies, and deliberately choose between an immutable package and a [custom upgrade policy](/develop/publish-upgrade-packages/custom-policies) rather than defaulting to single-key upgrade authority. See [Security Best Practices](/develop/security/best-practices) for guidance.

:::

- [Automated Address Management (Legacy, pre-v1.63)](automated-address-management) — Legacy documentation for the pre-v1.63 Move.lock-based address tracking system. For the current package system, see Move Package Management.
- [Move Package Management](move-package-management) — Learn how to use the Move package manager system.