diff --git a/lib/application.js b/lib/application.js
index f1e1374..ef3533e 100644
--- a/lib/application.js
+++ b/lib/application.js
@@ -46,6 +46,7 @@ function Application() {
   this.env = process.env.NODE_ENV || 'development';
   this.subdomainOffset = 2;
   this.middleware = [];
+  this.proxy = false;
   this.context = Object.create(context);
   this.request = Object.create(request);
   this.response = Object.create(response);
@@ -85,6 +86,7 @@ app.inspect =
 app.toJSON = function(){
   return only(this, [
     'subdomainOffset',
+    'proxy',
     'env'
   ]);
 };
diff --git a/test/application.js b/test/application.js
index 91bfade..0c1947c 100644
--- a/test/application.js
+++ b/test/application.js
@@ -67,6 +67,7 @@ describe('app.toJSON()', function(){
 
     obj.should.eql({
       subdomainOffset: 2,
+      proxy: false,
       env: 'test'
     });
   })
@@ -77,6 +78,7 @@ describe('app.inspect()', function(){
     var app = koa();
     var util = require('util');
     var str = util.inspect(app);
+    assert.equal("{ subdomainOffset: 2, proxy: false, env: 'test' }", str);
   })
 })