Package check result: NOTE

Check: CRAN incoming feasibility, Result: NOTE
  Maintainer: ‘Pepijn de Vries <pepijn.devries@outlook.com>’
  
  Found the following (possibly) invalid URLs:
    URL: https://pepijn-devries.github.io/ProTrackR/
      From: inst/doc/ProTrackR_vs_ProTrackR2.html
            README.md
      Status: Error
      Message: Could not resolve host: pepijn-devries.github.io
    URL: https://pepijn-devries.github.io/ProTrackR2/
      From: DESCRIPTION
            man/ProTrackR2-package.Rd
      Status: Error
      Message: Could not resolve host: pepijn-devries.github.io
    URL: https://pepijn-devries.github.io/openmpt/
      From: inst/doc/ProTrackR_vs_ProTrackR2.html
      Status: Error
      Message: Could not resolve host: pepijn-devries.github.io