[pandoc]: https://pandoc.org/
[paper-now]: https://github.com/PeerJ/paper-now
[python-gapminder]: https://swcarpentry.github.io/python-novice-gapminder/
-[pyyaml]: https://pypi.python.org/pypi/PyYAML
+[pyyaml]: https://pypi.org/project/PyYAML/
[r-markdown]: https://rmarkdown.rstudio.com/
[rstudio]: https://www.rstudio.com/
[ruby-install-guide]: https://www.ruby-lang.org/en/downloads/