diff --git a/lib/cartodb/controllers/layergroup.js b/lib/cartodb/controllers/layergroup.js
index a459af7d..80cb4b08 100644
--- a/lib/cartodb/controllers/layergroup.js
+++ b/lib/cartodb/controllers/layergroup.js
@@ -1,14 +1,11 @@
-var cors = require('../middleware/cors');
-var userMiddleware = require('../middleware/user');
-var allowQueryParams = require('../middleware/allow-query-params');
-var vectorError = require('../middleware/vector-error');
-
-var DataviewBackend = require('../backends/dataview');
-var AnalysisStatusBackend = require('../backends/analysis-status');
-
-var MapStoreMapConfigProvider = require('../models/mapconfig/provider/map-store-provider');
-
-var QueryTables = require('cartodb-query-tables');
+const cors = require('../middleware/cors');
+const userMiddleware = require('../middleware/user');
+const allowQueryParams = require('../middleware/allow-query-params');
+const vectorError = require('../middleware/vector-error');
+const DataviewBackend = require('../backends/dataview');
+const AnalysisStatusBackend = require('../backends/analysis-status');
+const MapStoreMapConfigProvider = require('../models/mapconfig/provider/map-store-provider');
+const QueryTables = require('cartodb-query-tables');
 
 /**
  * @param {prepareContext} prepareContext