diff --git a/lib/cartodb/models/dataview/aggregation.js b/lib/cartodb/models/dataview/aggregation.js
index 5cddac18..e8b431b4 100644
--- a/lib/cartodb/models/dataview/aggregation.js
+++ b/lib/cartodb/models/dataview/aggregation.js
@@ -1,5 +1,5 @@
-var BaseWidget = require('./base');
-var debug = require('debug')('windshaft:widget:aggregation');
+const BaseWidget = require('./base');
+const debug = require('debug')('windshaft:widget:aggregation');
 
 const filteredQueryTpl = ctx => `
     filtered_source AS (