diff --git a/.env.example b/.env.example
index b21ae8908..56faeb788 100644
--- a/.env.example
+++ b/.env.example
@@ -23,6 +23,8 @@ CACHE_DRIVER=redis
 SESSION_DRIVER=redis
 QUEUE_DRIVER=redis
 
+HORIZON_PREFIX="horizon-"
+
 REDIS_SCHEME=tcp
 REDIS_HOST=127.0.0.1
 REDIS_PASSWORD=null