diff --git a/env/dem_redis.env b/env/dem_redis.env
index 45dcfdf80c5dbf4b1dcdfccaba2671ee2b57d7ef..3eff4afd5a700d498d26fadb791632909d8b5f30 100644
--- a/env/dem_redis.env
+++ b/env/dem_redis.env
@@ -4,6 +4,7 @@ REDIS_PORT=6379
 REDIS_QUEUE_KEY=seed_queue
 
 REDIS_PREPROCESS_QUEUE_KEY=preprocess_queue
+REDIS_PREPROCESS_MD_QUEUE_KEY=preprocess-md_queue
 REDIS_REGISTER_QUEUE_KEY=register_queue
 REDIS_REGISTERED_SET_KEY=registered_set
 REDIS_SET_KEY=registered_set