diff --git a/Gemfile b/Gemfile
index 793ce2504..4e91f3d08 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,9 +2,6 @@ source 'https://rubygems.org'
 
 gemspec
 
-gem 'coveralls', require: false
-
-
 # Database Configuration
 group :development, :test do
   platforms :jruby do
diff --git a/friendly_id.gemspec b/friendly_id.gemspec
index de74187e4..d2f90dd94 100644
--- a/friendly_id.gemspec
+++ b/friendly_id.gemspec
@@ -18,6 +18,7 @@ Gem::Specification.new do |s|
 
   s.add_dependency 'activerecord', '~> 4.0.0'
 
+  s.add_development_dependency 'coveralls'
   s.add_development_dependency 'railties', '~> 4.0.0'
   s.add_development_dependency 'minitest', '>= 4.4.0'
   s.add_development_dependency 'mocha', '~> 0.13.3'