> ## Documentation Index
> Fetch the complete documentation index at: https://base-a060aa97-docs-ia-overhaul-v2.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Upgrades

> Base evolves through named hardforks. Each hardfork introduces protocol changes, new features, or parameter updates that take effect at a specific activation block. This tab tracks what changed, when, and how to migrate.

## Base Upgrades

| Upgrade                                              | Status   | Activation   |
| ---------------------------------------------------- | -------- | ------------ |
| [Denim](/base-chain/specs/upgrades/denim/overview)   | Planning | Nov 2026     |
| [Cobalt](/base-chain/specs/upgrades/cobalt/overview) | Upcoming | Sep 2026     |
| [Beryl](/base-chain/specs/upgrades/beryl/overview)   | Live     | Jun 25, 2026 |
| [Azul](/base-chain/specs/upgrades/azul/overview)     | Live     | May 28, 2026 |

## Upstream (OP Stack) Hardforks

Base inherits upstream OP Stack hardforks. Each entry documents the changes Base adopted.

| Hardfork                                                 | Status   |
| -------------------------------------------------------- | -------- |
| [Jovian](/base-chain/specs/upgrades/jovian/overview)     | Upcoming |
| [Isthmus](/base-chain/specs/upgrades/isthmus/overview)   | Live     |
| [Holocene](/base-chain/specs/upgrades/holocene/overview) | Live     |
| [Granite](/base-chain/specs/upgrades/granite/overview)   | Live     |
| [Fjord](/base-chain/specs/upgrades/fjord/overview)       | Live     |
| [Ecotone](/base-chain/specs/upgrades/ecotone/overview)   | Live     |
| [Delta](/base-chain/specs/upgrades/delta/overview)       | Live     |
| [Canyon](/base-chain/specs/upgrades/canyon/overview)     | Live     |

## Other Changes

The [configuration changelog](/base-chain/network-information/configuration-changelog) tracks network parameter changes that don't belong to a specific hardfork.