diff --git a/Gemfile b/Gemfile
index 87a39f308b..da2e988fe3 100644
--- a/Gemfile
+++ b/Gemfile
@@ -28,12 +28,13 @@ end
 
 group :test do
   gem "ammeter"
-  gem "poltergeist"
   gem "database_cleaner"
   gem "formulaic"
   gem "fuubar"
   gem "launchy"
+  gem "nokogiri", "~> 1.6.6.4"
   gem "percy-capybara"
+  gem "poltergeist"
   gem "shoulda-matchers", "~> 2.8.0", require: false
   gem "timecop"
   gem "webmock"
diff --git a/Gemfile.lock b/Gemfile.lock
index c7840a12f9..d45a7bb92e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -167,7 +167,7 @@ GEM
     neat (1.7.2)
       bourbon (>= 4.0)
       sass (>= 3.3)
-    nokogiri (1.6.6.2)
+    nokogiri (1.6.6.4)
       mini_portile (~> 0.6.0)
     normalize-rails (3.0.3)
     percy-capybara (1.0.0)
@@ -310,6 +310,7 @@ DEPENDENCIES
   high_voltage
   i18n-tasks
   launchy
+  nokogiri (~> 1.6.6.4)
   percy-capybara
   pg
   poltergeist