diff --git a/src/request.ts b/src/request.ts
index e12f830..94201a7 100644
--- a/src/request.ts
+++ b/src/request.ts
@@ -95,6 +95,7 @@ const requestPrototype: Record<string | symbol, any> = {
   'referrer',
   'referrerPolicy',
   'signal',
+  'keepalive',
 ].forEach((k) => {
   Object.defineProperty(requestPrototype, k, {
     get() {
diff --git a/test/request.test.ts b/test/request.test.ts
index d071e13..004b6a1 100644
--- a/test/request.test.ts
+++ b/test/request.test.ts
@@ -17,6 +17,7 @@ describe('Request', () => {
       expect(req.method).toBe('GET')
       expect(req.url).toBe('http://localhost/')
       expect(req.headers.get('host')).toBe('localhost')
+      expect(req.keepalive).toBe(false)
     })
 
     it('Should resolve double dots in URL', async () => {