diff --git a/ext/json/json.gemspec b/ext/json/json.gemspec
index 1be429216d..620955b279 100644
--- a/ext/json/json.gemspec
+++ b/ext/json/json.gemspec
@@ -18,6 +18,7 @@ Gem::Specification.new do |s|
     ".travis.yml",
     "CHANGES.md",
     "Gemfile",
+    "LICENSE",
     "README-json-jruby.md",
     "README.md",
     "Rakefile",