diff --git a/Rakefile b/Rakefile
index a858d7c..ab20506 100644
--- a/Rakefile
+++ b/Rakefile
@@ -8,6 +8,8 @@ Hoe.plugin :gemspec
 
 hoespec = Hoe.spec 'ruby-opencv' do |s|
   s.summary = 'OpenCV wrapper for Ruby'
+  s.description = 'ruby-opencv is a wrapper of OpenCV for Ruby. It helps you to write computer vision programs (e.g. detecting faces from pictures) with Ruby.'
+  s.licenses = ['The BSD License']
   s.developer('lsxi', 'masakazu.yonekura@gmail.com')
   s.developer('ser1zw', 'azariahsawtikes@gmail.com')
   s.developer('pcting', 'pcting@gmail.com')