diff --git a/omniauth_openid_connect.gemspec b/omniauth_openid_connect.gemspec
index 9d2b8d2b..242fe2f4 100644
--- a/omniauth_openid_connect.gemspec
+++ b/omniauth_openid_connect.gemspec
@@ -33,8 +33,8 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'guard', '~> 2.14'
   spec.add_development_dependency 'guard-bundler', '~> 2.2'
   spec.add_development_dependency 'guard-minitest', '~> 2.4'
-  spec.add_development_dependency 'minitest', '~> 5.1'
-  spec.add_development_dependency 'mocha', '~> 1.7'
+  spec.add_development_dependency 'minitest', '~> 5.20'
+  spec.add_development_dependency 'mocha', '~> 2.1'
   spec.add_development_dependency 'rake', '~> 12.0'
   spec.add_development_dependency 'rubocop', '~> 1.12'
   spec.add_development_dependency 'simplecov', '~> 0.21'