diff --git a/docs/source/en/basics/router.md b/docs/source/en/basics/router.md
index 035742f257..532c8cf0eb 100644
--- a/docs/source/en/basics/router.md
+++ b/docs/source/en/basics/router.md
@@ -23,7 +23,8 @@ module.exports = app => {
 // app/controller/user.js
 class UserController extends Controller {
   async info() {
-    this.ctx.body = {
+    const { ctx } = this;
+    ctx.body = {
       name: `hello ${ctx.params.id}`,
     };
   }
diff --git a/docs/source/zh-cn/basics/router.md b/docs/source/zh-cn/basics/router.md
index aa4aa51ff6..a4b3b5ad1a 100644
--- a/docs/source/zh-cn/basics/router.md
+++ b/docs/source/zh-cn/basics/router.md
@@ -25,7 +25,7 @@ module.exports = app => {
 class UserController extends Controller {
   async info() {
     const { ctx } = this;
-    this.ctx.body = {
+    ctx.body = {
       name: `hello ${ctx.params.id}`,
     };
   }
diff --git a/index.d.ts b/index.d.ts
index 84df0d45d6..5ae17f4cea 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -120,7 +120,7 @@ interface Request extends KoaApplication.Request { // tslint:disable-line
    */
   query: { [key: string]: string };
 
-  body: RequestArrayBody | RequestObjectBody;
+  body: any;
 }
 
 interface Response extends KoaApplication.Response { // tslint:disable-line
@@ -471,7 +471,7 @@ declare interface EggApplication extends KoaApplication { // tslint:disable-line
    * Keep the same api with httpclient.request(url, args).
    * See https://github.com/node-modules/urllib#api-doc for more details.
    */
-  curl(url: string, opt: RequestOptions): Promise<any>;
+  curl(url: string, opt?: RequestOptions): Promise<any>;
 
   /**
    * Get logger by name, it's equal to app.loggers['name'], but you can extend it with your own logical
@@ -733,7 +733,7 @@ export interface Context extends KoaApplication.Context {
    * Keep the same api with httpclient.request(url, args).
    * See https://github.com/node-modules/urllib#api-doc for more details.
    */
-  curl(url: string, opt: RequestOptions): Promise<any>;
+  curl(url: string, opt?: RequestOptions): Promise<any>;
 
   /**
    * Get logger by name, it's equal to app.loggers['name'], but you can extend it with your own logical