diff --git a/myst.yml b/myst.yml
index 943ad5f..08fcb0c 100644
--- a/myst.yml
+++ b/myst.yml
@@ -105,8 +105,7 @@ project:
     TEM: transmission electron microscopy
   toc:
     # Auto-generated by `myst init --write-toc`
-    #- file: index.md
-    - file: main.md
+    - file: index.md
     - file: intro.md
     - file: code.md
     - file: math.md