diff --git a/lib/cartodb/cache/named_map_provider_cache.js b/lib/cartodb/cache/named_map_provider_cache.js
index de879c73..c872b49d 100644
--- a/lib/cartodb/cache/named_map_provider_cache.js
+++ b/lib/cartodb/cache/named_map_provider_cache.js
@@ -1,9 +1,9 @@
 'use strict';
 
-var NamedMapMapConfigProvider = require('../models/mapconfig/provider/named-map-provider');
-var templateName = require('../backends/template_maps').templateName;
+const NamedMapMapConfigProvider = require('../models/mapconfig/provider/named-map-provider');
+const templateName = require('../backends/template_maps').templateName;
 
-var LruCache = require("lru-cache");
+const LruCache = require("lru-cache");
 
 const TEN_MINUTES_IN_MILLISECONDS = 1000 * 60 * 10;
 const ACTIONS = ['update', 'delete'];
@@ -31,9 +31,9 @@ function NamedMapProviderCache(
 module.exports = NamedMapProviderCache;
 
 NamedMapProviderCache.prototype.get = function(user, templateId, config, authToken, params, callback) {
-    var namedMapKey = createNamedMapKey(user, templateId);
-    var namedMapProviders = this.providerCache.get(namedMapKey) || {};
-    var providerKey = createProviderKey(config, authToken, params);
+    const namedMapKey = createNamedMapKey(user, templateId);
+    const namedMapProviders = this.providerCache.get(namedMapKey) || {};
+    const providerKey = createProviderKey(config, authToken, params);
 
     if (namedMapProviders.hasOwnProperty(providerKey)) {
         return callback(null, namedMapProviders[providerKey]);
@@ -66,7 +66,7 @@ function createNamedMapKey(user, templateId) {
     return user + ':' + templateName(templateId);
 }
 
-var providerKeyTpl = ctx => `${ctx.authToken}:${ctx.configHash}:${ctx.format}:${ctx.layer}:${ctx.scale_factor}`;
+const providerKeyTpl = ctx => `${ctx.authToken}:${ctx.configHash}:${ctx.format}:${ctx.layer}:${ctx.scale_factor}`;
 
 function createProviderKey(config, authToken, params) {
     const defaults = {