diff --git a/.env.example b/.env.example
index 2ed9080..082b5f2 100644
--- a/.env.example
+++ b/.env.example
@@ -8,7 +8,7 @@ DATABASE_PASSWORD=
 DATABASE_HOST=localhost
 DATABASE_PORT=5432
 
-REDIS_URL=
+REDIS_URL=redis://localhost:6379/0
 
 SENTRY_DSN=
 
diff --git a/config/environments/development.rb b/config/environments/development.rb
index 2bb245d..68e0ad1 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -20,7 +20,7 @@ Rails.application.configure do
     config.action_controller.perform_caching = true
     config.action_controller.enable_fragment_cache_logging = true
 
-    config.cache_store = :memory_store
+    config.cache_store = :redis_cache_store, { url: ENV['REDIS_URL'] }
     config.public_file_server.headers = {
       'Cache-Control' => "public, max-age=#{2.days.to_i}"
     }
diff --git a/config/environments/production.rb b/config/environments/production.rb
index 7c2d352..d80d81f 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -56,7 +56,7 @@ Rails.application.configure do
   config.log_tags = [ :request_id ]
 
   # Use a different cache store in production.
-  config.cache_store = :redis_cache_store, { url: ENV['REDIS_URL'] }
+  config.cache_store = :redis_cache_store, { url: ENV['HEROKU_REDIS_PURPLE_TLS_URL'] }
 
   # Use a real queuing backend for Active Job (and separate queues per environment).
   # config.active_job.queue_adapter     = :resque