diff --git a/Gemfile b/Gemfile
index 314d698ea4..136244034c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -18,7 +18,7 @@ gem 'rails-i18n', '~> 4.0.0'
 gem 'sass', '~> 3.4.0'
 gem 'sass-rails'
 gem 'slimmer', '~> 10.1.3'
-gem 'sprockets-rails', "~> 2.3.0" # version 3.2 available, but breaks a test.
+gem 'sprockets-rails', "~> 3.2.0"
 gem 'shared_mustache', '~> 1.0.0'
 gem 'statsd-ruby', '1.3.0', require: 'statsd'
 gem "therubyracer", "~> 0.12.0"
diff --git a/Gemfile.lock b/Gemfile.lock
index 7de9c98e24..9bd5c33ee9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -141,7 +141,7 @@ GEM
     mocha (1.2.1)
       metaclass (~> 0.0.1)
     multi_json (1.12.1)
-    mustache (1.0.3)
+    mustache (1.0.5)
     netrc (0.11.0)
     nokogiri (1.6.8.1)
       mini_portile2 (~> 2.1.0)
@@ -235,7 +235,7 @@ GEM
     scss_lint (0.51.0)
       rake (>= 0.9, < 13)
       sass (~> 3.4.20)
-    shared_mustache (1.0.0)
+    shared_mustache (1.0.1)
       execjs (>= 1.2.4)
       mustache (~> 1.0.2)
     shoulda-context (1.2.2)
@@ -258,10 +258,10 @@ GEM
     sprockets (3.7.1)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
-    sprockets-rails (2.3.3)
-      actionpack (>= 3.0)
-      activesupport (>= 3.0)
-      sprockets (>= 2.8, < 4.0)
+    sprockets-rails (3.2.0)
+      actionpack (>= 4.0)
+      activesupport (>= 4.0)
+      sprockets (>= 3.0.0)
     statsd-ruby (1.3.0)
     test-unit (3.2.3)
       power_assert
@@ -335,7 +335,7 @@ DEPENDENCIES
   simplecov
   simplecov-rcov
   slimmer (~> 10.1.3)
-  sprockets-rails (~> 2.3.0)
+  sprockets-rails (~> 3.2.0)
   statsd-ruby (= 1.3.0)
   therubyracer (~> 0.12.0)
   timecop
diff --git a/app/views/help/tour.html.erb b/app/views/help/tour.html.erb
index 2be2287dce..a00db01d6c 100644
--- a/app/views/help/tour.html.erb
+++ b/app/views/help/tour.html.erb
@@ -145,5 +145,5 @@
 <% content_for :body_classes do %>full-width<% end %>
 
 <% content_for :extra_javascript do %>
-  <%= javascript_include_tag 'tour.js', :defer => 'defer' %>
+  <%= javascript_include_tag 'tour.js', :defer => 'defer', integrity: true, crossorigin: 'anonymous' %>
 <% end %>
diff --git a/app/views/layouts/application.html.erb b/app/views/layouts/application.html.erb
index 042c599839..c27b3f749c 100644
--- a/app/views/layouts/application.html.erb
+++ b/app/views/layouts/application.html.erb
@@ -7,11 +7,11 @@
 
     <link title="Search" rel="search" type="application/opensearchdescription+xml" href="/search/opensearch.xml"/>
 
-    <!--[if gt IE 8]><!--><%= stylesheet_link_tag "application.css" %><!--<![endif]-->
+    <!--[if gt IE 8]><!--><%= stylesheet_link_tag "application.css", integrity: true, crossorigin: 'anonymous' %><!--<![endif]-->
     <!--[if IE 6]><%= stylesheet_link_tag "application-ie6.css" %><![endif]-->
     <!--[if IE 7]><%= stylesheet_link_tag "application-ie7.css" %><![endif]-->
     <!--[if IE 8]><%= stylesheet_link_tag "application-ie8.css" %><![endif]-->
-    <%= javascript_include_tag 'frontend.js' %>
+    <%= javascript_include_tag 'frontend.js', integrity: true, crossorigin: 'anonymous' %>
     <%= yield :extra_javascript %>
     <%= yield :extra_headers %>
     <% if @content_item %>
diff --git a/app/views/travel_advice/index.html.erb b/app/views/travel_advice/index.html.erb
index 0299c6b50a..8b6a6b8a77 100644
--- a/app/views/travel_advice/index.html.erb
+++ b/app/views/travel_advice/index.html.erb
@@ -1,5 +1,5 @@
 <% content_for :extra_headers do %>
-  <%= javascript_include_tag "views/travel-advice.js" %>
+  <%= javascript_include_tag "views/travel-advice.js", integrity: true, crossorigin: 'anonymous' %>
   <%= auto_discovery_link_tag :atom, travel_advice_path(:format => :atom), :title => "Recent updates" %>
 <% end %>