diff --git a/src/Symfony/Component/HttpFoundation/Cookie.php b/src/Symfony/Component/HttpFoundation/Cookie.php
index e61619aa6d..83a97087f1 100644
--- a/src/Symfony/Component/HttpFoundation/Cookie.php
+++ b/src/Symfony/Component/HttpFoundation/Cookie.php
@@ -28,6 +28,7 @@ class Cookie
     private $raw;
     private $sameSite;
 
+    const SAMESITE_NONE = 'none';
     const SAMESITE_LAX = 'lax';
     const SAMESITE_STRICT = 'strict';
 
@@ -128,7 +129,7 @@ class Cookie
             $sameSite = strtolower($sameSite);
         }
 
-        if (!\in_array($sameSite, [self::SAMESITE_LAX, self::SAMESITE_STRICT, null], true)) {
+        if (!\in_array($sameSite, [self::SAMESITE_LAX, self::SAMESITE_STRICT, self::SAMESITE_NONE, null], true)) {
             throw new \InvalidArgumentException('The "sameSite" parameter value is not valid.');
         }