diff --git a/.gitignore b/.gitignore
index b28332d4..28a5595e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,6 +14,7 @@ target/
 publish-docs/
 generated/
 /build-*.log.gz
+security-guide-rst/build
 
 # Transifex Client Setting
 .tx