diff --git a/github-linguist.gemspec b/github-linguist.gemspec
index cb3955a6..463275f2 100644
--- a/github-linguist.gemspec
+++ b/github-linguist.gemspec
@@ -15,7 +15,7 @@ Gem::Specification.new do |s|
 
   s.add_dependency 'charlock_holmes', '~> 0.7.3'
   s.add_dependency 'escape_utils',    '~> 1.0.1'
-  s.add_dependency 'mime-types',      '~> 1.19'
+  s.add_dependency 'mime-types',      '>= 1.19'
   s.add_dependency 'rugged',          '~> 0.22.0b1'
 
   s.add_development_dependency 'mocha'