<?xml version='1.0'?>
-<!DOCTYPE platform SYSTEM "http://simgrid.gforge.inria.fr/simgrid/simgrid.dtd">
+<!DOCTYPE platform SYSTEM "https://simgrid.org/simgrid.dtd">
<!-- All routes of this platform are of length 1, so you can use it with the NS3 model
http://simgrid.gforge.inria.fr/simgrid/latest/doc/pls_ns3.html -->