# Support for npm-compatible package managers
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These other package managers are compatible with CodeArtifact and work with the npm package format and npm wire protocol: 
+  [pnpm package manager](https://pnpm.js.org). The latest version confirmed to work with CodeArtifact is 3.3.4, which was released on May 18, 2019. 
+  [Yarn package manager](https://yarnpkg.com/). The latest version confirmed to work with CodeArtifact is 1.21.1, which was released on December 11, 2019. 

**Note**  
We recommend using Yarn 2.x with CodeArtifact. Yarn 1.x does not have HTTP retries, which means it is more susceptible to intermittent service faults which result in 500-level status codes or errors. There is no way to configure a different retry strategy for Yarn 1.x, but this has been added in Yarn 2.x. You can use Yarn 1.x, but you may need to add higher-level retries in build scripts. For example, running your yarn command in a loop so that it will retry if downloading packages fails.