diff --git a/intacct_ruby.gemspec b/intacct_ruby.gemspec
index 3287951..96b365f 100644
--- a/intacct_ruby.gemspec
+++ b/intacct_ruby.gemspec
@@ -27,7 +27,7 @@ Gem::Specification.new do |spec|
 
   spec.add_development_dependency 'bundler', '~> 1.13'
   spec.add_development_dependency 'nokogiri', '~> 1.6', '>= 1.6.8'
-  spec.add_development_dependency 'mocha', '~> 2.0.2'
+  spec.add_development_dependency 'mocha', '~> 2.1.0'
   spec.add_development_dependency 'pry-byebug', '~> 3.4', '>= 3.4.2'
   spec.add_development_dependency 'rake', '~> 13.0'
   spec.add_development_dependency 'rspec', '~> 3.0'