diff --git a/cri.gemspec b/cri.gemspec
index 90b0f9b..5824b4f 100644
--- a/cri.gemspec
+++ b/cri.gemspec
@@ -22,6 +22,6 @@ Gem::Specification.new do |s|
 
   s.add_development_dependency('bundler', '~> 1.6')
 
-  s.rdoc_options     = ['--main', 'README.adoc']
-  s.extra_rdoc_files = ['LICENSE', 'README.adoc', 'NEWS.md']
+  s.rdoc_options     = ['--main', 'README.md']
+  s.extra_rdoc_files = ['LICENSE', 'README.md', 'NEWS.md']
 end