diff --git a/.env.docker b/.env.docker
index 72032e0e6..cbf1d5968 100644
--- a/.env.docker
+++ b/.env.docker
@@ -83,6 +83,8 @@ REDIS_PASSWORD=redis_password
 REDIS_PORT=6379
 REDIS_DATABASE=0
 
+HORIZON_PREFIX="horizon-"
+
 ## EXPERIMENTS 
 EXP_LC=false
 EXP_REC=false
@@ -145,4 +147,4 @@ TRUST_PROXIES="*"
 
 ## Passport
 #PASSPORT_PRIVATE_KEY=
-#PASSPORT_PUBLIC_KEY=
\ No newline at end of file
+#PASSPORT_PUBLIC_KEY=