diff --git a/LICENSE b/LICENSE
index d16e29f..07fe756 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,7 +1,7 @@
 The MIT License (MIT)
 
 Copyright (c) 2014 Jonathan Ong me@jongleberry.com
-Copyright (c) 2015 koajs and other contributors
+Copyright (c) 2015-present koajs and other contributors
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/index.js b/index.js
index 76e63bd..b02f4d1 100644
--- a/index.js
+++ b/index.js
@@ -1,6 +1,6 @@
 const merge = require('merge-descriptors');
 
-module.exports = function (app, mode) {
+module.exports = function (app, mode, options) {
   mode = mode || 'extended';
   const qs = (mode === 'extended') ? require('qs') : require('querystring');
 
@@ -25,7 +25,7 @@ module.exports = function (app, mode) {
       let c = this._querycache = this._querycache || {};
       let query = c[str];
       if (!query) {
-        c[str] = query = qs.parse(str);
+        c[str] = query = qs.parse(str, options);
         if (converter) {
           for (let key in query) {
             query[key] = converter(query[key]);
diff --git a/package.json b/package.json
index 68ad442..d88b612 100644
--- a/package.json
+++ b/package.json
@@ -11,6 +11,18 @@
     "url": "http://jongleberry.com",
     "twitter": "https://twitter.com/jongleberry"
   },
+  "contributors": [
+    {
+      "name": "Nick Baugh",
+      "email": "niftylettuce@gmail.com",
+      "url": "http://niftylettuce.com/"
+    },
+    {
+      "name": "Imed Jaberi",
+      "email": "imed_jebari@hotmail.fr",
+      "url": "https://www.3imed-jaberi.com/"
+    }
+  ],
   "license": "MIT",
   "repository": "koajs/qs",
   "dependencies": {
diff --git a/test/test.spec.js b/test/test.spec.js
index 68adbe7..000aa4b 100644
--- a/test/test.spec.js
+++ b/test/test.spec.js
@@ -114,4 +114,51 @@ describe('Koa Querystring', function () {
       })
     })
   })
+
+  describe('custom qs options', function () {
+    it('should correctly parse numbers and booleans', function (done) {
+      let app = qs(new Koa(), null, {
+        decoder: function (str) {
+          switch (str) {
+            case 'true': return true;
+            case 'false': return false;
+            case 'null': return null;
+          }
+
+          if (/^[\d.]+$/.test(str)) {
+            return Number(str);
+          }
+
+          return str;
+        }
+      })
+
+      app.use(convert(function* (next) {
+        try {
+          yield* next
+        } catch (err) {
+          console.error(err.stack)
+        }
+      }))
+
+      app.use(convert(function* () {
+        this.body = this.query;
+      }))
+
+      request(app.listen())
+        .get('/?a=str&b=1&c=3.1415&d=true&e=false&f=null&g=2.7182e')
+        .expect(function (res) {
+          res.body.should.eql({
+            a: 'str',
+            b: 1,
+            c: 3.1415,
+            d: true,
+            e: false,
+            f: null,
+            g: '2.7182e',
+          })
+        })
+        .expect(200, done);
+    })
+  })
 })