thodg/slides

diff --git a/README.md b/README.md
index 5929efc..3f76c39 100644
--- a/README.md
+++ b/README.md
@@ -11,17 +11,17 @@ with
 
 ### Pandoc
 A few examples of Pandoc usage to generate Beamer presentations from Markdown syntax.
-[Markdown](https://github.com/thodg/slides/blob/master/pandoc.md)
+[Markdown](https://github.com/thodg/slides/blob/master/pandoc/index.md)
 [PDF](https://github.com/thodg/slides/blob/master/pandoc.pdf)
 
 ## 2019
 
 ### BSD
 About *BSD and UNIX history.
-[Markdown](https://github.com/thodg/slides/blob/master/bsd.md)
+[Markdown](https://github.com/thodg/slides/blob/master/bsd/index.md)
 [PDF](https://github.com/thodg/slides/blob/master/bsd.pdf)
 
 ### RailsOnLisp
 An introduction to Common Lisp and RailsOnLisp.
-[Markdown](https://github.com/thodg/slides/blob/master/railsonlisp.md)
+[Markdown](https://github.com/thodg/slides/blob/master/railsonlisp/index.md)
 [PDF](https://github.com/thodg/slides/blob/master/railsonlisp.pdf)