diff --git a/conf/nginx-primaryonly.conf b/conf/nginx-primaryonly.conf
index 9ed37043..8b7dd6bb 100644
--- a/conf/nginx-primaryonly.conf
+++ b/conf/nginx-primaryonly.conf
@@ -8,6 +8,7 @@
 	rewrite ^/admin/munin$ /admin/munin/ redirect;
 	location /admin/ {
 		proxy_pass http://127.0.0.1:10222/;
+		proxy_read_timeout 600s;
 		proxy_set_header X-Forwarded-For $remote_addr;
 		add_header X-Frame-Options "DENY";
 		add_header X-Content-Type-Options nosniff;