diff --git a/replace_gemname.gemspec b/replace_gemname.gemspec
index 7d93ff2..0ea0045 100644
--- a/replace_gemname.gemspec
+++ b/replace_gemname.gemspec
@@ -24,19 +24,19 @@ Gem::Specification.new do |spec|
 
   spec.add_development_dependency 'yard', '~> 0.8.7.4'
   spec.add_development_dependency 'yard-redcarpet-ext', '~> 0.0.3'
-  spec.add_development_dependency 'redcarpet', '~> 3.1.2'
-  spec.add_development_dependency 'github-markup', '1.2.1'
+  spec.add_development_dependency 'redcarpet', '~> 3.2.2'
+  spec.add_development_dependency 'github-markup', '~> 1.3.1'
 
-  spec.add_development_dependency 'rubocop', '~> 0.24.0'
+  spec.add_development_dependency 'rubocop', '~> 0.28.0'
 
-  spec.add_development_dependency 'rake', '~> 10.3.2'
+  spec.add_development_dependency 'rake', '~> 10.4.2'
 
-  spec.add_development_dependency 'guard', '~> 2.6.1'
+  spec.add_development_dependency 'guard', '~> 2.10.5'
   spec.add_development_dependency 'guard-yard', '~> 2.1.0'
-  spec.add_development_dependency 'guard-rubocop', '~> 1.1.0'
-  spec.add_development_dependency 'guard-rspec', '~> 4.3.1'
+  spec.add_development_dependency 'guard-rubocop', '~> 1.2.0'
+  spec.add_development_dependency 'guard-rspec', '~> 4.5.0'
 
-  spec.add_development_dependency 'rspec', '~> 3.0.0'
+  spec.add_development_dependency 'rspec', '~> 3.1.0'
   spec.add_development_dependency 'simplecov', '~> 0.9.0'
   spec.add_development_dependency 'coveralls', '~> 0.7.0'
   spec.add_development_dependency 'fuubar', '~> 2.0.0'