diff --git a/nginx/mattermost.conf b/nginx/mattermost.conf
index c6cf24f..be9e4eb 100644
--- a/nginx/mattermost.conf
+++ b/nginx/mattermost.conf
@@ -107,6 +107,7 @@ server {
         proxy_connect_timeout 90;
         proxy_send_timeout 300;
         proxy_read_timeout 90s;
+        proxy_http_version 1.1;
         proxy_pass http://backend;
     }