<?xml version='1.0'?>
-<!DOCTYPE platform SYSTEM "http://simgrid.gforge.inria.fr/simgrid/simgrid.dtd">
+<!DOCTYPE platform SYSTEM "https://simgrid.org/simgrid.dtd">
<platform version="4.1">
<cluster id="cluster" prefix="MyHost" radical="1-2" suffix=""
speed="100.0Mf,50.0Mf,20.0Mf" core="4"