diff --git a/.gitignore b/.gitignore
index 2567b9b3..e3a2c38d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -80,6 +80,7 @@ share/
 
 # Jupyter Book
 book/_build/
+site/_build/
 
 # NBGrader
 assignments/autograded/