Package check result: NOTE

Check: CRAN incoming feasibility, Result: NOTE
  Maintainer: ‘Thomas J. Matthews <txm676@gmail.com>’
  
  Found the following (possibly) invalid URLs:
    URL: https://www.gnu.org/licenses/gpl-3.0
      From: README.md
      Status: Error
      Message: Connection timed out after 60000 milliseconds