diff --git a/package.json b/package.json
index 34c3f885..41979eaf 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
   },
   "homepage": "https://github.com/eggjs/core#readme",
   "dependencies": {
-    "@eggjs/koa": "^2.20.1",
+    "@eggjs/koa": "^2.20.2",
     "@eggjs/router": "^3.0.5",
     "@eggjs/utils": "^4.0.2",
     "egg-logger": "^3.5.0",
diff --git a/src/egg.ts b/src/egg.ts
index 79d8fd56..8e3b2943 100644
--- a/src/egg.ts
+++ b/src/egg.ts
@@ -37,6 +37,7 @@ export type EggCoreInitOptions = Partial<EggCoreOptions>;
 // export @eggjs/koa classes
 export {
   KoaRequest, KoaResponse, KoaContext, KoaApplication,
+  Router,
 };
 
 // export @eggjs/koa types