diff --git a/github-linguist.gemspec b/github-linguist.gemspec
index 43f64822..01e7e816 100644
--- a/github-linguist.gemspec
+++ b/github-linguist.gemspec
@@ -5,6 +5,7 @@ Gem::Specification.new do |s|
 
   s.authors  = "GitHub"
   s.homepage = "https://github.com/github/linguist"
+  s.license  = "MIT"
 
   s.files = Dir['lib/**/*']
   s.executables << 'linguist'