# Automated Vyper Contract Migration Tool

> The tool is designed to automatically rewrites Vyper smart contracts to modern syntax.

**Published by:** [ETH Daily](https://ethdaily.io/)
**Published on:** 2026-05-29
**Categories:** vyper, banteg, smart-contracts, developer-tools, ethereum
**URL:** https://ethdaily.io/automated-vyper-contract-migration-tool

## Content

Banteg introduced a new tool called vyupgrade, designed to automatically rewrites Vyper smart contracts to modern syntax, then validates the migration is safe. Vyper is the second most popular smart contract programming language used by Ethereum developers. After rewriting the contracts, vyupgrade compiles both the original and the updated version and checks that the ABI, method identifiers, and storage layout are identical. The tool covers all syntax changes from Vyper 0.2.1 through 0.4.3, with support for dependencies and modules including snekmate. The tool addresses contracts written in older versions of Vyper that won't compile under newer versions without a manual update. Where a rewrite cannot be proven safe, vyupgrade flags it for manual review instead of applying it automatically.Sponsored byETHConf lands in NYC June 8-10, bringing together 5,000+ attendees, 150+ speakers, and 100+ companies across Ethereum, stablecoins, and institutional adoption. Get your tickets at ethconf.com and use code ETHDAILY for 30% off General and 20% off VIP.Disclaimer: Content is for informational and educational purposes only and does not constitute financial, investment, legal, or other professional advice. No representations or warranties are made as to accuracy, completeness, or timeliness. Use of this content is at your own risk, and you should consult a qualified professional before making decisions. No fiduciary or advisory relationship is created

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