# Columbus-5 upgrade

Columbus-5 is the newest iteration of the Terra Mainnet. Use these guides to upgrade to Columbus-5.

# Migration Guides

# Columbus-5

Columbus-5 will use Terra Core v0.5.5 which integrates Cosmos SDK v0.43.0 and CosmWasm v0.16.0.

$ terrad version
name: terra
server_name: terrad
version: 0.5.5
commit: d8e277626e74f9d6417dcd598574686882f0274c
build_tags: netgo,ledger
go: go version go1.16.5 darwin/amd64
  • Note: For JavaScript developers: npm i -S @terra-money/terra.js@^2

# Schedule

Columbus-5: Columbus-4 will be halted at block height #4,724,000.
Expected Timeline:

Wed Sep 29 2021 23:00:00 GMT-0800 (PDT) Thu Sep 30 2021 07:00:00 GMT+0000 (UTC) Thu Sep 30 2021 16:00:00 GMT+0900 (KST)

# Bombay-12 Testnet

The genesis event for Bombay-12 testnet will occur 2021-09-28T09:00:00Z (UTC). For detailed instructions, see the Bombay-12 testnet release guide (opens new window).

# Major Updates

# Release Notes

# Reference