Package check result: NOTE

Check: CRAN incoming feasibility, Result: NOTE
  Maintainer: ‘Manuel López-Ibáñez <manuel.lopez-ibanez@manchester.ac.uk>’
  
  Found the following (possibly) invalid URLs:
    URL: http://www.gnu.org/licenses/gpl.html
      From: README.md
      Status: Error
      Message: Timeout was reached [www.gnu.org]:
        Connection timed out after 60002 milliseconds

No changes to worse in reverse depends.