diff --git a/lib/cartodb/models/mapconfig/provider/map-store-provider.js b/lib/cartodb/models/mapconfig/provider/map-store-provider.js
index e621738f..3cbff358 100644
--- a/lib/cartodb/models/mapconfig/provider/map-store-provider.js
+++ b/lib/cartodb/models/mapconfig/provider/map-store-provider.js
@@ -1,5 +1,5 @@
-var _ = require('underscore');
-var dot = require('dot');
+const _ = require('underscore');
+const dot = require('dot');
 const QueryTables = require('cartodb-query-tables');
 
 /**
@@ -30,7 +30,7 @@ MapStoreMapConfigProvider.prototype.getMapConfig = function(callback) {
         return callback(null, this.mapConfig, this.params, this.context);
     }
 
-    var context = {};
+    const context = {};
 
     this.userLimitsBackend.getRenderLimits(this.user, this.params.api_key, (err, renderLimits) => {
         if (err) {
@@ -61,19 +61,19 @@ MapStoreMapConfigProvider.prototype.getCacheBuster = function() {
 };
 
 MapStoreMapConfigProvider.prototype.filter = function(key) {
-    var regex = new RegExp('^' + this.createKey(true) + '.*');
+    const regex = new RegExp('^' + this.createKey(true) + '.*');
     return key && key.match(regex);
 };
 
 // Configure bases for cache keys suitable for string interpolation
-var baseKey   = '{{=it.dbname}}:{{=it.token}}';
-var rendererKey = baseKey + ':{{=it.dbuser}}:{{=it.format}}:{{=it.layer}}:{{=it.scale_factor}}';
+const baseKey   = '{{=it.dbname}}:{{=it.token}}';
+const rendererKey = baseKey + ':{{=it.dbuser}}:{{=it.format}}:{{=it.layer}}:{{=it.scale_factor}}';
 
-var baseKeyTpl = dot.template(baseKey);
-var rendererKeyTpl = dot.template(rendererKey);
+const baseKeyTpl = dot.template(baseKey);
+const rendererKeyTpl = dot.template(rendererKey);
 
 MapStoreMapConfigProvider.prototype.createKey = function(base) {
-    var tplValues = _.defaults({}, this.params, {
+    const tplValues = _.defaults({}, this.params, {
         dbname: '',
         token: '',
         dbuser: '',