OpenZeppelin Contracts

Security Center
Last updated: February 29, 2024

Since the early days of Solidity in 2016, OpenZeppelin Contracts has been the go-to library for smart contract development. Today it is used by everyone from development teams of the largest projects transacting billions of dollars each day to individuals building blockchain applications.

In addition to keeping Contracts safe with our best-in-class suite of practices, our security process allow us to test and showcase our internal audit practices and provide a reference example for other security-minded crypto companies.

If you believe you have discovered a security vulnerability in an OpenZeppelin library, please follow instructions here to file a report.

If you need technical support or audit services, please visit the community forum or get in touch with our security services team.

Audit Reports
Test Coverage
Security Updates
Latest version is 5.0.2
Bug Bounty Programs
Full Details
Source Code
Weekly NPM Downloads: 385,013
GitHub Stars: 23.7k
Dependent Repos: 182,722
Contributors: 427
License: MIT
On-chain Usage
Best estimates
Deployments (2023 YTD)
Active Contracts (2023 YTD)
Transactions Processed (2023 YTD)
Total Value Locked in OpenZeppelin Contracts