diff --git a/.gitignore b/.gitignore
index 622e11c..14f74dd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,7 +12,6 @@
 # cookiecutter webpage things
 cookiecutter.json
 #/book/_build/html/assets
-/book/_build
 # Byte-compiled / optimized / DLL files
 __pycache__/
 *.py[cod]