diff --git a/csvlint.gemspec b/csvlint.gemspec
index 6872c160..7fda3e88 100644
--- a/csvlint.gemspec
+++ b/csvlint.gemspec
@@ -20,7 +20,6 @@ Gem::Specification.new do |spec|
 
   spec.required_ruby_version = ['~> 2.0']
 
-  spec.add_dependency "mime-types"
   spec.add_dependency "colorize"
   spec.add_dependency "open_uri_redirections"
   spec.add_dependency "activesupport"
diff --git a/lib/csvlint.rb b/lib/csvlint.rb
index 5d6d32d8..76d84e92 100644
--- a/lib/csvlint.rb
+++ b/lib/csvlint.rb
@@ -7,7 +7,6 @@
 
 require 'active_support/core_ext/date/conversions'
 require 'active_support/core_ext/time/conversions'
-require 'mime/types'
 require 'open_uri_redirections'
 require 'uri_template'