diff --git a/.gitignore b/.gitignore
index eb99377..72818e9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -133,4 +133,5 @@ _build/
 _contents/
 
 # Jupyterlite
-_output/
\ No newline at end of file
+_output/
+book/.jupyterlite.doit.db
diff --git a/book/.jupyterlite.doit.db b/book/.jupyterlite.doit.db
deleted file mode 100644
index c022fbd..0000000
Binary files a/book/.jupyterlite.doit.db and /dev/null differ