diff --git a/rack-attack.gemspec b/rack-attack.gemspec
index 99436e3..ea08ec3 100644
--- a/rack-attack.gemspec
+++ b/rack-attack.gemspec
@@ -7,6 +7,7 @@ require 'rack/attack/version'
 Gem::Specification.new do |s|
   s.name = 'rack-attack'
   s.version = Rack::Attack::VERSION
+  s.license = 'MIT'
 
   s.authors = ["Aaron Suggs"]
   s.description = "A rack middleware for throttling and blocking abusive requests"