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# Upgrading glean_parser
To upgrade the version of `glean_parser` used by the Glean SDK, run the `bin/update-glean-parser-version.sh` script, providing the version as a command line parameter:
```sh
bin/update-glean-parser-version.sh 1.28.3
```
This will update the version in all of the required places. Commit those changes to `git` and submit a pull request.
No further steps are required to use the new version of `glean_parser` for code generation: all of the build integrations automatically update `glean_parser` to the correct version.
For testing the Glean Python bindings, the virtual environment needs to be deleted to force an upgrade of `glean_parser`:
```sh
rm -rf glean-core/python/.venv*
```