diff --git a/redis/README.md b/redis/README.md
index 2561563..f4235e4 100644
--- a/redis/README.md
+++ b/redis/README.md
@@ -8,7 +8,7 @@
 > ```bash
 > docker run -d --restart unless-stopped \
 >   -e DB_TYPE=redis \
->    \
+>   -e REDIS_URL='...' \
 >   ghcr.io/tiennm99/db-keepalive:latest
 > ```
 >