diff --git a/Gemfile b/Gemfile
index 2956785..82c9b37 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,12 +2,3 @@ source 'https://rubygems.org'
 
 # Specify your gem's dependencies in lita-gitter.gemspec
 gemspec
-
-gem 'github_changelog_generator', '~> 1.6.1'
-
-gem 'rubocop', '~> 0.31.0', require: false
-
-gem 'rspec', '~> 3.3.0', require: false
-
-gem 'simplecov', '~> 0.10.0', require: false
-gem 'coveralls'
diff --git a/lita-gitter.gemspec b/lita-gitter.gemspec
index a7bfd28..ff7db3e 100644
--- a/lita-gitter.gemspec
+++ b/lita-gitter.gemspec
@@ -24,6 +24,11 @@ Gem::Specification.new do |spec|
 
   spec.add_development_dependency 'bundler', '~> 1.7'
   spec.add_development_dependency 'rake', '~> 10.0'
+  spec.add_development_dependency 'github_changelog_generator', '~> 1.6.1'
+  spec.add_development_dependency 'rubocop', '~> 0.31.0'
+  spec.add_development_dependency 'rspec', '~> 3.3.0'
+  spec.add_development_dependency 'simplecov', '~> 0.10.0'
+  spec.add_development_dependency 'coveralls'
 
   spec.add_runtime_dependency 'lita', '>= 4.4'
   spec.add_runtime_dependency 'em-http-request', '~> 1.1'