diff --git a/_config.yml b/_config.yml
index b013c21..317ff8b 100644
--- a/_config.yml
+++ b/_config.yml
@@ -2,4 +2,4 @@ name: R for data science
 markdown: redcarpet
 highlighter: pygments
 
-exclude: ["CONTRIBUTING.md", "README.md", "book"]
+exclude: ["CONTRIBUTING.md", "README.md", "book", "vendor"]