diff --git a/book_index.md b/book_index.md
index 65238d8..6108ff3 100644
--- a/book_index.md
+++ b/book_index.md
@@ -2,7 +2,6 @@
 title: Index
 permalink: book_index.html
 layout: default
-root: ../
 ---
 
 ## C