diff --git a/packages/cookies/src/response-cookies.ts b/packages/cookies/src/response-cookies.ts
index 3bf7c3e7..5c548f48 100644
--- a/packages/cookies/src/response-cookies.ts
+++ b/packages/cookies/src/response-cookies.ts
@@ -110,10 +110,6 @@ function replace(bag: Map<string, ResponseCookie>, headers: Headers) {
 }
 
 function normalizeCookie(cookie: ResponseCookie = { name: '', value: '' }) {
-  if (typeof cookie.expires === 'number') {
-    cookie.expires = new Date(cookie.expires)
-  }
-
   if (cookie.maxAge) {
     cookie.expires = new Date(Date.now() + cookie.maxAge * 1000)
   }
diff --git a/packages/cookies/src/types.ts b/packages/cookies/src/types.ts
index fcd4d461..065164ff 100644
--- a/packages/cookies/src/types.ts
+++ b/packages/cookies/src/types.ts
@@ -13,8 +13,8 @@ export interface CookieListItem
   name: string
   /** A string containing the value of the cookie. */
   value: string
-  /** A number of milliseconds or Date interface containing the expires of the cookie. */
-  expires?: number | CookieSerializeOptions['expires']
+  /** A Date interface containing the expires of the cookie. */
+  expires?: CookieSerializeOptions['expires']
 }
 
 /**
diff --git a/packages/cookies/test/response-cookies.test.ts b/packages/cookies/test/response-cookies.test.ts
index 3e111939..42ebe840 100644
--- a/packages/cookies/test/response-cookies.test.ts
+++ b/packages/cookies/test/response-cookies.test.ts
@@ -12,7 +12,6 @@ test('reflect .set into `set-cookie`', async () => {
     .set('foo', 'bar', { path: '/test' })
     .set('fooz', 'barz', { path: '/test2' })
     .set('fooHttpOnly', 'barHttpOnly', { httpOnly: true })
-    .set('fooExpires', 'barExpires', { expires: 0 })
     .set('fooExpiresDate', 'barExpiresDate', { expires: new Date(0) })
     .set('fooMaxAge', '', { maxAge: 0 })
     .set('fooSameSite', 'barSameSite', {
@@ -24,7 +23,6 @@ test('reflect .set into `set-cookie`', async () => {
   expect(cookies.get('foo')?.value).toBe('bar')
   expect(cookies.get('fooz')?.value).toBe('barz')
   expect(cookies.get('fooHttpOnly')?.value).toBe('barHttpOnly')
-  expect(cookies.get('fooExpires')?.value).toBe('barExpires')
   expect(cookies.get('fooExpiresDate')?.value).toBe('barExpiresDate')
   expect(cookies.get('fooMaxAge')?.value).toBe('')
   expect(cookies.get('fooSameSite')?.value).toBe('barSameSite')
@@ -46,12 +44,6 @@ test('reflect .set into `set-cookie`', async () => {
     path: '/',
     httpOnly: true,
   })
-  expect(cookies.get('fooExpires')).toEqual({
-    name: 'fooExpires',
-    value: 'barExpires',
-    path: '/',
-    expires: new Date(0),
-  })
   expect(cookies.get('fooExpiresDate')).toEqual({
     name: 'fooExpiresDate',
     value: 'barExpiresDate',
@@ -77,7 +69,6 @@ test('reflect .set into `set-cookie`', async () => {
     'foo=bar; Path=/test',
     'fooz=barz; Path=/test2',
     'fooHttpOnly=barHttpOnly; Path=/; HttpOnly',
-    'fooExpires=barExpires; Path=/; Expires=Thu, 01 Jan 1970 00:00:00 GMT',
     'fooExpiresDate=barExpiresDate; Path=/; Expires=Thu, 01 Jan 1970 00:00:00 GMT',
     'fooMaxAge=; Path=/; Max-Age=0',
     'fooSameSite=barSameSite; Path=/; Secure; SameSite=none; Partitioned',