https://github.com/celery/kombu/blob/main/requirements/extras/redis.txt ``` pip install kombu[redis] ... Successfully installed amqp-5.3.1 kombu-5.5.3 redis-5.2.1 tzdata-2025.2 vine-5.1.0 ``` So kombu does not support 5.3.0 yet. But when we install celery (in a fresh environment) it installs redis 5.3.0 ``` pip install celery[redis] ... Successfully installed PyJWT-2.9.0 amqp-5.3.1 billiard-4.2.1 celery-5.5.2 click-8.1.8 click-didyoumean-0.3.1 click-plugins-1.1.1 click-repl-0.3.0 kombu-5.5.3 prompt-toolkit-3.0.51 python-dateutil-2.9.0.post0 redis-5.3.0 six-1.17.0 tzdata-2025.2 vine-5.1.0 wcwidth-0.2.13 ``` I noticed when reporting this redis-py 5.3.0 API warning : https://github.com/celery/kombu/issues/2293