diff --git a/requirements/base.txt b/requirements/base.txt
index 037eeea17..089a3d80a 100644
--- a/requirements/base.txt
+++ b/requirements/base.txt
@@ -2,7 +2,7 @@ python-slugify==8.0.1  # https://github.com/un33k/python-slugify
 Pillow==10.2.0  # https://github.com/python-pillow/Pillow
 argon2-cffi==21.3.0  # https://github.com/hynek/argon2_cffi
 whitenoise==6.5.0  # https://github.com/evansd/whitenoise
-redis==5.2.1  # https://github.com/redis/redis-py
+redis==5.3.1  # https://github.com/redis/redis-py — pin 5.3.x; 5.2.x deadlocks in ConnectionPool.release (redis-py#3677), 6.x reintroduces it (celery#9622)
 hiredis==2.2.3  # https://github.com/redis/hiredis-py
 celery==5.4.0  # pyup: < 6.0  # https://github.com/celery/celery
 django-celery-beat==2.5.0  # https://github.com/celery/django-celery-beat