Package check result: NOTE

Check: CRAN incoming feasibility, Result: NOTE
  Maintainer: ‘Alex Hubbard <hubbard.alex@gmail.com>’
  
  Found the following (possibly) invalid URLs:
    URL: http://econ.korea.ac.kr/~cjkim/
      From: DESCRIPTION
            man/kalmanfilter-package.Rd
      Status: Error
      Message: Timeout was reached [econ.korea.ac.kr]:
        Connection timed out after 60002 milliseconds

No changes to worse in reverse depends.