diff --git a/S3-Nginx-Proxy.md b/S3-Nginx-Proxy.md
index 4dc6a0c..527563d 100644
--- a/S3-Nginx-Proxy.md
+++ b/S3-Nginx-Proxy.md
@@ -3,7 +3,7 @@ It's a common concept to put a proxy in front of S3 that handles requests. Nginx
 ### Example Nginx config
 
 ```
-upstream seaweedfs { server localhost:8333 fail_timeout=0; }
+upstream seaweedfs { server localhost:8333 fail_timeout=0; keepalive 20;}
 
 server {
 	listen 443 ssl;