diff --git a/config/settings/development.py b/config/settings/development.py
index b31c6c5f..d0d261b9 100644
--- a/config/settings/development.py
+++ b/config/settings/development.py
@@ -32,6 +32,15 @@
 LOGGING["loggers"]["ethicalads_ext"]["level"] = "DEBUG"
 
 
+# Cache
+# https://docs.djangoproject.com/en/dev/topics/cache/
+# https://github.com/jazzband/django-redis
+# --------------------------------------------------------------------------
+# Use the Redis cache in development if the REDIS_URL env var is set
+if env("REDIS_URL", default=None):
+    CACHES["default"] = env.cache("REDIS_URL")
+
+
 # Celery settings for asynchronous tasks
 # http://docs.celeryproject.org
 # --------------------------------------------------------------------------
diff --git a/config/settings/production.py b/config/settings/production.py
index ebb2bbbb..ebbf6783 100644
--- a/config/settings/production.py
+++ b/config/settings/production.py
@@ -64,7 +64,7 @@
 
 # Cache
 # https://docs.djangoproject.com/en/dev/topics/cache/
-# https://niwinz.github.io/django-redis/
+# https://github.com/jazzband/django-redis
 # --------------------------------------------------------------------------
 CACHES["default"] = env.cache("REDIS_URL")
 
diff --git a/config/settings/testing.py b/config/settings/testing.py
index ff7cb1dc..365e9cae 100644
--- a/config/settings/testing.py
+++ b/config/settings/testing.py
@@ -42,6 +42,12 @@
     },
 }
 
+# Always use in-memory cache for testing
+CACHES["default"] = {
+    "BACKEND": "django.core.cache.backends.locmem.LocMemCache",
+    "LOCATION": "",
+}
+
 # Celery should be always eager - there's no distributed celery workers in test
 CELERY_TASK_ALWAYS_EAGER = True
 
diff --git a/requirements/production.in b/requirements/production.in
index 1efc3c35..364755c9 100644
--- a/requirements/production.in
+++ b/requirements/production.in
@@ -11,7 +11,9 @@ psycopg[binary,pool]
 django-anymail
 
 # Redis (cache)
-django-redis
+# Hiredis is a faster Redis client implementation in C
+# https://github.com/jazzband/django-redis?tab=readme-ov-file#pluggable-parsers
+django-redis[hiredis]
 
 # Upload files to cloud storage (Azure)
 django-storages[azure]
diff --git a/requirements/production.txt b/requirements/production.txt
index c7ce57a7..26511af3 100644
--- a/requirements/production.txt
+++ b/requirements/production.txt
@@ -100,7 +100,7 @@ django-extensions==4.1
     # via -r base.in
 django-ratelimit==3.0.1
     # via -r base.in
-django-redis==6.0.0
+django-redis[hiredis]==6.0.0
     # via -r production.in
 django-simple-history==3.10.1
     # via -r base.in
@@ -122,6 +122,8 @@ geoip2==5.1.0
     # via -r base.in
 gunicorn==23.0.0
     # via -r production.in
+hiredis==3.3.0
+    # via redis
 idna==3.11
     # via
     #   requests
@@ -172,7 +174,7 @@ pytz==2025.2
     # via -r base.in
 qrcode==8.2
     # via django-allauth
-redis==5.3.1
+redis[hiredis]==5.3.1
     # via
     #   celery
     #   django-redis