diff --git a/lib/ruby-handlebars/escapers/html_escaper.rb b/lib/ruby-handlebars/escapers/html_escaper.rb
index a714cc1..e430719 100644
--- a/lib/ruby-handlebars/escapers/html_escaper.rb
+++ b/lib/ruby-handlebars/escapers/html_escaper.rb
@@ -1,3 +1,5 @@
+require 'cgi'
+
 module Handlebars
   module Escapers
     class HTMLEscaper