diff --git a/.gitignore b/.gitignore
index bb960ab..646bdab 100644
--- a/.gitignore
+++ b/.gitignore
@@ -139,4 +139,5 @@ book/.jupyterlite.doit.db
 # TeachBooks
 **.teachbooks/
 book/_toc_with_local_paths.yml
-book/_git/
\ No newline at end of file
+book/_git/
+book/conf.py
\ No newline at end of file