Package

@openzeppelin/contracts

Secure Smart Contract library for Solidity

v5.6.1, 27 Feb 2026MIT-Types: NoneBlockchain and Web3 Security

$ npm install @openzeppelin/contracts

npm GitHub Homepage

Key numbers

As of 25 Sept 2026

Weekly downloads: 760.9k; - over 12 months
Gzip bundle size: -; No Bundlephobia data
Dependencies: 0; Direct, from package.json
Last release: 6 months ago; v5.6.1
GitHub stars: 27.3k; 12.4k forks
Open issues / PRs: 214 / 143
Contributors: -
Commits, last 52 weeks: 251

Downloads

No weekly download data in the snapshot.

760,909 downloads last week, 3,798,068 in the last month. No 52-week series has been fetched yet.

Maintenance

Releases, last 12 months: 451 in total
Latest version: 5.6.1, 27 Feb 20266 months ago
First published: 26 Jul 2019
Last push to GitHub: 25 Sept 2026same day as the snapshot
Repository archived: No
Open issues: 214
Open pull requests: 143
Commits, last 52 weeks: 251
Dependents on npm: 3,712

Major versions

v5 first release 5.0.0, 5 Oct 2023
v4 first release 4.0.0, 23 Mar 2021
v3 first release 3.0.0, 20 Apr 2020
v2 first release 2.3.0, 26 Jul 2019

Recent releases

Version	Published
5.7.0	29 Jul 2026
5.6.1	27 Feb 2026
5.6.0	25 Feb 2026
5.5.0	31 Oct 2025
5.4.0	17 Jul 2025
5.3.0	9 Apr 2025
5.2.0	9 Jan 2025
5.1.0	17 Oct 2024
4.9.6	29 Feb 2024
5.0.2	29 Feb 2024
4.9.5	8 Dec 2023
5.0.1	7 Dec 2023
4.9.4	7 Dec 2023
5.0.0	5 Oct 2023

Compatibility

Module format: -Not determined from package.json
TypeScript types: None
Node.js engine range: Not declared
Runtimes: -
Unpacked size (npm): 2.8 MB
Dependencies (0): None

Install

npm install @openzeppelin/contracts

CDN

jsDelivr: 3.9m requests in 30 days

jsDelivrhttps://cdn.jsdelivr.net/npm/@openzeppelin/contracts@5.6.1/
unpkghttps://unpkg.com/@openzeppelin/contracts@5.6.1/
esm.shhttps://esm.sh/@openzeppelin/contracts@5.6.1

Alternatives

Package	Weekly downloads	Gzip	Last release	Module	Comparison
@nomiclabs/hardhat-solhint Hardhat plugin for solhint	12.7k	-	6 months ago	CommonJS	-
@nomicfoundation/ignition-core Hardhat Ignition is a declarative system for deploying smart contracts on Ethereum. It enables you to define smart contract instances you want to deploy, and any operation you want to run on them. By taking over the deployment and execution, Hardhat Ignit	93.7k	-	1 month ago	ESM only	-
@nomicfoundation/hardhat-ignition Hardhat Ignition is a declarative system for deploying smart contracts on Ethereum. It enables you to define smart contract instances you want to deploy, and any operation you want to run on them. By taking over the deployment and execution, Hardhat Ignit	92.8k	-	2 months ago	ESM only	-
@nomicfoundation/hardhat-ignition-ethers The Ethers extension to Hardhat Ignition. Hardhat Ignition is a declarative system for deploying smart contracts on Ethereum. It enables you to define smart contract instances you want to deploy, and any operation you want to run on them. By taking over t	77.6k	-	3 months ago	ESM only	-
@nomicfoundation/hardhat-ignition-viem The Viem extension to Hardhat Ignition. Hardhat Ignition is a declarative system for deploying smart contracts on Ethereum. It enables you to define smart contract instances you want to deploy, and any operation you want to run on them. By taking over the	18.6k	-	3 months ago	ESM only	-
hardhat-contract-sizer Output Solidity contract sizes with Hardhat	34.6k	-	1 year ago	CommonJS	-
hardhat Hardhat is an extensible developer tool that helps smart contract developers increase productivity by reliably bringing together the tools they want.	364.9k	-	today	ESM only	-
@nomicfoundation/hardhat-utils Utilities for Hardhat and its plugins	73.9k	-	today	ESM only	-

Sources: npm registry, GitHub API, jsDelivr. Data fetched 25 Sept 2026.

Indexability: Indexed.