diff --git a/.gitignore b/.gitignore
index 7b8b3d8..45d2c1f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,6 +6,7 @@ temp/
 ## main build output
 main.pdf
 chapter/out.tex
+chapter/out.md
 
 ## IDE and Editor files
 .idea/**