diff --git a/book/_toc.yml b/book/_toc.yml
index c72a931..90d6d1b 100644
--- a/book/_toc.yml
+++ b/book/_toc.yml
@@ -2,4 +2,4 @@ format: jb-book
 root: intro.md
 
 chapters:
-  - file: external/MUDE/book/intro.md
+  - file: external/MUDE/book/intro.md
\ No newline at end of file