diff --git a/index.d.ts b/index.d.ts
index 7682daf3ad..f19c59fb07 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -584,7 +584,7 @@ declare module 'egg' {
      * 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<T = any>(url: string, opt?: RequestOptions): Promise<T>;
 
     /**
      * Get logger by name, it's equal to app.loggers['name'], but you can extend it with your own logical
@@ -891,7 +891,7 @@ declare module 'egg' {
      * 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<T = any>(url: string, opt?: RequestOptions): Promise<T>;
 
     /**
      * Render a file by view engine