diff --git a/.node-version b/.node-version
deleted file mode 100644
index 53d1c14db..000000000
--- a/.node-version
+++ /dev/null
@@ -1 +0,0 @@
-v22
diff --git a/__tests__/application/index.test.js b/__tests__/application/index.test.js
index d5d6ccc54..5df7be3c4 100644
--- a/__tests__/application/index.test.js
+++ b/__tests__/application/index.test.js
@@ -59,7 +59,7 @@ describe('app', () => {
 
   it('should set compose from the constructor', () => {
     const compose = () => (ctx) => {}
-    const app = new Koa({ compose })
+    const app = new Koa.default({ compose })
     assert.strictEqual(app.compose, compose)
   })
 
diff --git a/__tests__/application/respond.test.js b/__tests__/application/respond.test.js
index 80703e7ac..0d3d9592c 100644
--- a/__tests__/application/respond.test.js
+++ b/__tests__/application/respond.test.js
@@ -556,6 +556,20 @@ describe('app.respond', () => {
         .expect(200)
         .expect('content-type', 'application/octet-stream')
     })
+
+    it('should respond hello', async () => {
+      const app = new Koa()
+
+      app.use(async ctx => {
+        ctx.body = new Blob(['hello']).stream()
+      })
+
+      return request(app.callback())
+        .get('/')
+        .expect(200)
+        .expect('content-type', 'application/octet-stream')
+        .expect(Buffer.from('hello'))
+    })
   })
 
   describe('when .body is a Response', () => {
@@ -578,13 +592,14 @@ describe('app.respond', () => {
 
       app.use(ctx => {
         ctx.body = new Response(null, { status: 200, statusText: 'OK' })
+        console.log(ctx)
       })
 
       return request(app.callback())
-        .head('/')
+        .get('/')
         .expect(200)
         .expect('content-type', 'application/octet-stream')
-        .expect('content-length', '2')
+        .expect(Buffer.from([]))
     })
   })
 
diff --git a/lib/application.js b/lib/application.js
index 0ba1c8907..4d170b049 100644
--- a/lib/application.js
+++ b/lib/application.js
@@ -306,7 +306,7 @@ function respond (ctx) {
   if (body instanceof Stream) return body.pipe(res)
   if (body instanceof Blob) return Stream.Readable.from(body.stream()).pipe(res)
   if (body instanceof ReadableStream) return Stream.Readable.from(body).pipe(res)
-  if (body instanceof Response) return Stream.Readable.from(body?.body).pipe(res)
+  if (body instanceof Response) return Stream.Readable.from(body?.body || '').pipe(res)
 
   // body: json
   body = JSON.stringify(body)
diff --git a/lib/only.js b/lib/only.js
index 0551a3354..0fc27bbed 100644
--- a/lib/only.js
+++ b/lib/only.js
@@ -1,6 +1,4 @@
 module.exports = (obj, keys) => {
-  obj = obj || {}
-  if (typeof keys === 'string') keys = keys.split(/ +/)
   const ret = {}
   for (let i = 0; i < keys.length; i++) {
     const key = keys[i]
diff --git a/lib/response.js b/lib/response.js
index 8893fcba5..ce709c6dd 100644
--- a/lib/response.js
+++ b/lib/response.js
@@ -205,9 +205,6 @@ module.exports = {
         this.set(key, headers.get(key))
       }
 
-      if (val.redirected) {
-        this.redirect(val.url)
-      }
       return
     }