Package check result: NOTE

Check: CRAN incoming feasibility, Result: NOTE
  Maintainer: ‘Sebastian Stoeckl <sebastian.stoeckl@uni.li>’
  
  Found the following (possibly) invalid URLs:
    URL: https://www.linkedin.com/in/aaroncwk/
      From: README.md
      Status: 999
    URL: https://www.linkedin.com/in/alicejingliu/
      From: README.md
      Status: 999

No changes to worse in reverse depends.