diff --git a/lib/html.js b/lib/html.js
index 7149e80..3a5f759 100644
--- a/lib/html.js
+++ b/lib/html.js
@@ -16,7 +16,7 @@ const processHtml = (templateName, map) => {
   else if (templateName === 'homePageAddon')
     template = homePageAddonTemplate
 
-  var re = new RegExp(Object.keys(map).join('|'),'gi')
+  const re = new RegExp(Object.keys(map).join('|'),'gi')
   return template.replace(re, matched => map[matched])
 }