diff --git a/Gemfile b/Gemfile
index 33449c9d4..71da6ea24 100644
--- a/Gemfile
+++ b/Gemfile
@@ -25,7 +25,7 @@ group :test do
   gem 'poltergeist', require: false
   gem 'capybara', '~> 2.5.0'
   gem 'govuk-content-schema-test-helpers', '~> 1.5'
-  gem 'mocha', '~> 1.1.0', require: false
+  gem 'mocha', '~> 1.3.0', require: false
   gem 'shoulda'
   gem 'webmock'
   gem 'test-unit'
diff --git a/Gemfile.lock b/Gemfile.lock
index 13950d5b6..d4376fce8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -169,7 +169,7 @@ GEM
       capybara (~> 2.2)
       minitest (~> 5.0)
       rake
-    mocha (1.1.0)
+    mocha (1.3.0)
       metaclass (~> 0.0.1)
     money (6.10.0)
       i18n (>= 0.6.4, < 1.0)
@@ -335,7 +335,7 @@ DEPENDENCIES
   logstasher (= 1.2.2)
   minitest
   minitest-capybara (~> 0.7.2)
-  mocha (~> 1.1.0)
+  mocha (~> 1.3.0)
   nokogiri (~> 1.7)
   plek (= 1.11.0)
   poltergeist