diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 19c13f5db..fa4f42d5c 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -19,6 +19,14 @@ module ApplicationHelper
     end
   end
 
+  def escape_unicode(javascript)
+    if javascript
+      javascript.gsub(/\342\200\250/u, '&#x2028;').gsub(/(<\/)/u, '\u003C/').html_safe
+    else
+      ''
+    end
+  end
+
   def with_format(format, &block)
     old_formats = formats
     self.formats = [format]
diff --git a/app/views/layouts/application.html.erb b/app/views/layouts/application.html.erb
index c82dbd09d..5fc7deebb 100644
--- a/app/views/layouts/application.html.erb
+++ b/app/views/layouts/application.html.erb
@@ -59,7 +59,7 @@
     <%- if @preloaded.present? %>
       <script>
       <%- @preloaded.each do |key, json| %>
-        PreloadStore.store("<%= key %>",<%= raw json %>);
+        PreloadStore.store("<%= key %>",<%= escape_unicode(json) %>);
       <% end %>
       </script>
     <%- end %>