diff --git a/kontrol.gemspec b/kontrol.gemspec
index 1411f0a..7252301 100644
--- a/kontrol.gemspec
+++ b/kontrol.gemspec
@@ -18,6 +18,7 @@ lib/kontrol.rb
 lib/kontrol/application.rb
 lib/kontrol/builder.rb
 lib/kontrol/helpers.rb
+lib/kontrol/mime_types.rb
 lib/kontrol/router.rb
 lib/kontrol/template.rb
 test/application_spec.rb