diff --git a/swd.gemspec b/swd.gemspec
index 492b632..dc38ffb 100644
--- a/swd.gemspec
+++ b/swd.gemspec
@@ -6,6 +6,7 @@ Gem::Specification.new do |s|
   s.homepage    = 'https://github.com/nov/swd'
   s.summary     = %q{SWD (Simple Web Discovery) Client Library}
   s.description = %q{SWD (Simple Web Discovery) Client Library}
+  s.license     = 'MIT'
   s.files         = `git ls-files`.split("\n")
   s.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")
   s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }