diff --git a/README.md b/README.md
index a9be3c4f..1fc0c4f0 100644
--- a/README.md
+++ b/README.md
@@ -218,15 +218,15 @@ For further information, consult one of the following:
  [overleaf-5]: https://www.overleaf.com/latex/examples/writing-posters-with-markdown/jtbgmmgqrqmh       "Writing Posters with Markdown"
  [overleaf-6]: https://www.overleaf.com/latex/examples/using-markdown-in-latex-documents/whdrnpcpnwrm   "Using Markdown in LaTeX documents"
 
- [tb119]: https://www.tug.org/TUGboat/tb38-2/tb119novotny.pdf                "Using Markdown inside TeX documents"
- [tb124]: https://www.tug.org/TUGboat/tb40-1/tb124novotny-markdown.pdf       "Markdown 2.7.0: Towards lightweight markup in TeX"
- [tb129]: https://www.tug.org/TUGboat/tb41-3/tb129novotny-frozen.pdf         "Making Markdown into a Microwave Meal"
- [tb131]: https://www.tug.org/TUGboat/tb42-2/tb131novotny-markdown.pdf       "Markdown 2.10.0: LaTeX Themes & Snippets, Two Flavors of Comments, and LuaMetaTeX"
- [tb133]: https://www.tug.org/TUGboat/tb43-1/tb133novotny-markdown.pdf       "Markdown 2.15.0: What's New?"
- [tb135]: https://www.tug.org/TUGboat/tb43-3/tb135novotny-markdown.pdf       "Markdown 2.17.1: What's New, What's Next?"
- [tb136]: https://www.tug.org/TUGboat/tb44-1/tb136novotny-markdown-attr.pdf  "Attributes in Markdown"
- [tb138]: https://www.overleaf.com/read/mjghwhrbgmfj                         "Markdown 3 at TUG 2023: Reflections from the Q&A session"
- [tb139]: https://www.overleaf.com/read/fgzrbrqhyfqd                         "Fast Regression Testing of TeX Packages: The Unreasonable Effectiveness of Batching"
+ [tb119]: https://www.tug.org/TUGboat/tb38-2/tb119novotny.pdf                                  "Using Markdown inside TeX documents"
+ [tb124]: https://www.tug.org/TUGboat/tb40-1/tb124novotny-markdown.pdf                         "Markdown 2.7.0: Towards lightweight markup in TeX"
+ [tb129]: https://www.tug.org/TUGboat/tb41-3/tb129novotny-frozen.pdf                           "Making Markdown into a Microwave Meal"
+ [tb131]: https://www.tug.org/TUGboat/tb42-2/tb131novotny-markdown.pdf                         "Markdown 2.10.0: LaTeX Themes & Snippets, Two Flavors of Comments, and LuaMetaTeX"
+ [tb133]: https://www.tug.org/TUGboat/tb43-1/tb133novotny-markdown.pdf                         "Markdown 2.15.0: What's New?"
+ [tb135]: https://www.tug.org/TUGboat/tb43-3/tb135novotny-markdown.pdf                         "Markdown 2.17.1: What's New, What's Next?"
+ [tb136]: https://www.tug.org/TUGboat/tb44-1/tb136novotny-markdown-attr.pdf                    "Attributes in Markdown"
+ [tb138]: https://www.overleaf.com/read/mjghwhrbgmfj                                           "Markdown 3 at TUG 2023: Reflections from the Q&A session"
+ [tb139]: https://github.com/witiko/fast-regression-testing/releases/download/latest/main.pdf  "Fast Regression Testing of TeX Packages: The Unreasonable Effectiveness of Batching"
 
  [tb131-slides]:     https://tug.org/tug2021/assets/pdf/tug2021-novotny-slides.pdf                            "Markdown 2.10.0: LaTeX Themes & Snippets, Two Flavors of Comments, and LuaMetaTeX"
  [tb131-video]:      https://youtu.be/i2GJMnLCZls                                                             "Markdown 2.10.0: LaTeX Themes & Snippets, Two Flavors of Comments, and LuaMetaTeX"