# Versioning #### Contract versions Blockchain is immutable, therefore the versioning is not supported. There is always only **one version** on the blockchain. #### Upgradable Proxies Even by upgrading the implementation for a contract. The previous implementation gets obsolete, so you have to reinstall the contract to regenerate the code. #### Git versioning of the `0xweb/` folder Unlike `node_modules` we suggest adding `0xweb` folder with the generated classes to the project's repository. You can track later the changes made to the dAPPs (*in case of proxies*). But you can also add `0xweb` to `.gitignore`, as you can reinstall all contracts listed in `0xweb.json` file any time later. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.0xweb.org/package-manager/versioning.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.