diff --git a/Gemfile b/Gemfile
index f0eb2bc9f..8bcbf50a7 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,7 +5,6 @@ gemspec
 group :development do
   gem "bundler"
   gem "minitest"
-  gem "rdoc"
   gem "coveralls"
   gem "rubocop"
 end