diff --git a/src/cache.js b/src/cache.js
index 02a0ffed2e..7fd9c6492c 100644
--- a/src/cache.js
+++ b/src/cache.js
@@ -1,10 +1,10 @@
 'use strict';
 
-var LRU = require('lru-cache');
-var pubsub = require('./pubsub');
+const LRU = require('lru-cache');
+const pubsub = require('./pubsub');
 
-var cache = new LRU({
-	max: 1000,
+const cache = new LRU({
+	max: 4000,
 	maxAge: 0,
 });
 cache.hits = 0;
diff --git a/src/categories/index.js b/src/categories/index.js
index 9937e2b63a..06279d976f 100644
--- a/src/categories/index.js
+++ b/src/categories/index.js
@@ -1,16 +1,16 @@
 
 'use strict';
 
-var _ = require('lodash');
+const _ = require('lodash');
 
-var db = require('../database');
-var user = require('../user');
-var groups = require('../groups');
-var plugins = require('../plugins');
-var privileges = require('../privileges');
+const db = require('../database');
+const user = require('../user');
+const groups = require('../groups');
+const plugins = require('../plugins');
+const privileges = require('../privileges');
 const cache = require('../cache');
 
-var Categories = module.exports;
+const Categories = module.exports;
 
 require('./data')(Categories);
 require('./create')(Categories);