Index: modules/trac/files/site.conf
===================================================================
--- a/modules/trac/files/site.conf
+++ b/modules/trac/files/site.conf
@@ -4,7 +4,7 @@
   fastcgi_split_path_info ^()(.*)$;
   include /etc/nginx/fastcgi_params;
   fastcgi_param PATH_INFO $fastcgi_path_info;
-  client_max_body_size 15m;
+  client_max_body_size 20m;
 }
 
 location /chrome/