diff --git a/github-auth.gemspec b/github-auth.gemspec
index af89ea8..ac8b860 100644
--- a/github-auth.gemspec
+++ b/github-auth.gemspec
@@ -18,16 +18,16 @@ Gem::Specification.new do |spec|
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ['lib']
 
-  spec.add_development_dependency 'bundler',        '~> 1.5'
+  spec.add_development_dependency 'bundler',        '~> 1.5.3'
   spec.add_development_dependency 'cane',           '~> 2.6.1'
   spec.add_development_dependency 'cane-hashcheck', '~> 1.2.0'
   spec.add_development_dependency 'coveralls',      '~> 0.7.0'
   spec.add_development_dependency 'mute',           '~> 1.1.0'
-  spec.add_development_dependency 'pry',            '~> 0.9.12.4'
+  spec.add_development_dependency 'pry',            '~> 0.9.12.6'
   spec.add_development_dependency 'rake',           '~> 10.1.1'
   spec.add_development_dependency 'rspec',          '~> 2.14.1'
   spec.add_development_dependency 'sinatra',        '~> 1.4.4'
-  spec.add_development_dependency 'thin',           '~> 1.6.1'
+  spec.add_development_dependency 'thin',           '~> 1.6.2'
 
   spec.add_runtime_dependency 'faraday', '~> 0.9.0'
   spec.add_runtime_dependency 'thor',    '~> 0.18.1'