diff --git a/seafile.subdomain.conf.sample b/seafile.subdomain.conf.sample
index f2b115d..8ae92ad 100644
--- a/seafile.subdomain.conf.sample
+++ b/seafile.subdomain.conf.sample
@@ -22,7 +22,6 @@ server {
         proxy_set_header X-Forwarded-Proto $scheme;
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header Connection "";
-        proxy_http_version 1.1;
 
         client_max_body_size 0;
     }