diff --git a/.rdoc_options b/.rdoc_options
index 51538b332d..07f4fac835 100644
--- a/.rdoc_options
+++ b/.rdoc_options
@@ -2,4 +2,4 @@
 rdoc_include:
 - doc
 main_page: README.md
-op_dir: _site
+op_dir: html