Release of OMERO 5.6.0 with Python 3

The OME team is pleased to announce the release of OMERO 5.6.0

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Today we are very excited (also proud, delighted and relieved) to announce the release of OMERO 5.6.0, the first Python3-based release of the OMERO server and web components. This release of OMERO also upgrades the version of Bio-Formats to 6.3.1.

All Python code can and must now be installed separately from the, meaning that fixes can be released more quickly. This version does not require a database upgrade but only supports Python 3. We strongly encourage an immediate upgrade since maintenance of Python 2.7 ended promptly on New Year’s Day and all future OMERO security patches will only be available for OMERO 5.6 and greater.

Deployment environments:

The current list of supported platforms is:

* Note that Ice 3.6 is the only version of Ice that we support. On Debian 10, the default is Ice 3.7 requiring extra installation steps. There are no plans to add support for Ice 3.7.

Additionally, we have installation guides for Debian 9 and Ubuntu 16.04. In both cases, Python 3.5 will be installed. Not all functionality has been tested with Python 3.5 but we do not expect major issues. If you choose to install OMERO on these environments, we’d welcome feedback and comments.

For all other platforms, we recommend using conda. An ome channel is available on while we investigate moving to conda-forge.

Getting Started:

Documentation for this release is available under with the Python 3 Migration page being a good place for developers and system administrators to start. is available at https// The has been dropped in favor of PyPI.

Clients are available on GitHub. The updated OMERO.insight 5.5.8 is available at, which supports connections to both 5.5 and 5.6 servers.

Official Docker images are available as usual on Docker Hub with either the latest or the 5.6 tag:

And the PyPI-released components include:

A huge thanks to several beta testers for all the help in making this release possible!

All the best with your upgrades,

The OME Team

You’re invited to discuss this forum post on the topic.

January 15, 2020

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