diff --git a/doc/rpm-build/nginx.conf b/doc/rpm-build/nginx.conf
index a608f13d71..887a2fe327 100644
--- a/doc/rpm-build/nginx.conf
+++ b/doc/rpm-build/nginx.conf
@@ -3,6 +3,9 @@
 
 # stuff for http block
 client_max_body_size 1g;
+# fix error: upstream sent too big header while reading response header from upstream
+fastcgi_buffers 16 16k;
+fastcgi_buffer_size 32k;
 
 server {
 	listen 80 default_server;