diff --git a/_config.yml b/_config.yml
index 0022c14..fbeeb8d 100644
--- a/_config.yml
+++ b/_config.yml
@@ -17,4 +17,5 @@ exclude:
   - Gemfile.lock
   - README.md
   - gen_mgemdata.rb
+  - gen_mrbdoc.rb
   - vendor