diff --git a/_toc.yml b/_toc.yml
index da8a26c..1cd3068 100644
--- a/_toc.yml
+++ b/_toc.yml
@@ -2,7 +2,7 @@
 # Learn more at https://jupyterbook.org/customize/toc.html
 
 format: jb-book
-root: intro
+root: index
 title: Introduction
 chapters:
     - file: exercises-setup
diff --git a/intro.md b/index.md
similarity index 100%
rename from intro.md
rename to index.md