diff --git a/readme.md b/readme.md
index 35fba5d0..7e294c6c 100644
--- a/readme.md
+++ b/readme.md
@@ -307,7 +307,7 @@ Sets the expiration of the HTTP document using the `Cache-Control` and `Expires`
 $httpResponse->setExpiration('1 hour');
 ```
 
-setCookie(string $name, string $value, $time, string $path = null, string $domain = null, bool $secure = null, bool $httpOnly = null, string $sameSite = null)
+setCookie(string $name, string $value, string|int|\DateTimeInterface|null $expire, string $path = null, string $domain = null, bool $secure = null, bool $httpOnly = null, string $sameSite = null)
 --------------------------------------------------------------------------------------------------------------------------------------------------------------
 Sends a cookie. The default values ​​of the parameters are:
 - `$path` with scope to all directories (`'/'`)
@@ -316,7 +316,7 @@ Sends a cookie. The default values ​​of the parameters are:
 - `$httpOnly` is true, so the cookie is inaccessible to JavaScript
 - `$sameSite` is null, so the flag is not specified
 
-The time can be specified as a string or the number of seconds.
+The `$expire` parameter can be specified as a string, an object implementing `DateTimeInterface`, or the number of seconds.
 
 ```php
 $httpResponse->setCookie('lang', 'en', '100 days');
diff --git a/src/Http/IResponse.php b/src/Http/IResponse.php
index 114af2a8..b71dfe29 100644
--- a/src/Http/IResponse.php
+++ b/src/Http/IResponse.php
@@ -397,7 +397,7 @@ function getHeaders(): array;
 	function setCookie(
 		string $name,
 		string $value,
-		?int $expire,
+		string|int|\DateTimeInterface|null $expire,
 		?string $path = null,
 		?string $domain = null,
 		?bool $secure = null,