pika 1.5.0 ships November 17, 2026: please try 1.5.0rc4

[Luke Bakken (lukebakken)]

Note

Written by Claude Code under the direction of Luke Bakken (@lukebakken), a pika maintainer.

pika 1.5.0 ships on Tuesday, November 17, 2026, and from then a plain pip install pika gets it. pycti (OpenCTI) depends on pika, so this is advance notice and a request to try the release candidate first:

pip install --pre 'pika==1.5.0rc4'

What is most likely to affect pycti (OpenCTI):

• Your pin blocks 1.5.0. pika~=1.4.4 keeps pycti on 1.4.x, so nothing changes for your users until you widen it. Please try rc4 and widen the pin if it passes.
• BlockingConnection, used by OpenCTIConnectorHelper, now emits a DeprecationWarning from its constructor (it is removed in pika 2.0). It still works, but a test suite run with warnings as errors fails on it; the upgrade notes give a one-line filterwarnings entry. The replacement is the new thread-safe pika.Connection.

The full list is in the 1.5.0 upgrade notes. Besides the deprecations, pika.compat is gone, pika.spec is now type-annotated (which can surface new type-checker errors), and an inbound message body above 64 MiB now closes the connection (configurable with max_inbound_message_body_size).

If anything breaks, please open an issue at https://github.com/pika/pika/issues before November 17, 2026, even if it turns out to be intended. A short "our tests pass on rc4" reply here, or in pika/pika#1816, helps just as much. Thank you!