adding sentry-trello to requirements.txt throws ContextualVersionConflict error

[radonthetyrant]

Hello,
I wanted to add trello integration to my docker-sentry.
After adding sentry-trello to the requirements.txt i went through the build process, then the web upgrade process, which failed with a ContextualVersionConflict

Log excerpt:

⇒  docker-compose run --rm web upgrade
Starting dockersentry_smtp_1 ... done
Starting dockersentry_memcached_1 ...
Starting dockersentry_postgres_1 ...
Starting dockersentry_postgres_1 ... done
Failed to load plugin 'trello':
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/site-packages/sentry/runner/initializer.py", line 31, in register_plugins
    plugin = ep.load()
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2345, in load
    self.require(*args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2368, in require
    items = working_set.resolve(reqs, env, installer, extras=self.extras)
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 789, in resolve
    raise VersionConflict(dist, req).with_context(dependent_req)
ContextualVersionConflict: (redis 2.10.5 (/usr/local/lib/python2.7/site-packages), Requirement.parse('redis==2.10.6'), set(['redis-py-cluster']))

Full log (web update cmd starts at L148, error occurs in L154+) See attached file
docker-sentry-trello-err.txt

Any advice appreciated