# Upperkut changes

0.5.x
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- Fix thread-unsafe code that was overwriting worker configurations when
multiples workers were configured in the same process.

0.4.x
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- Change redis versioning policy #17
- Fixed error that prevented users from start upperkut from non Rails apps.
- Added integration with Rollbar.
- Added backtrace to logs when some error occurs.
- Fixed NewRelic trace args