diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,3 +1,7 @@
+## 0.4.5
+
+* Added `SameSite=None`
+
 ## 0.4.4
 
 * Dropped dependency on blaze-builder
diff --git a/Web/Cookie.hs b/Web/Cookie.hs
--- a/Web/Cookie.hs
+++ b/Web/Cookie.hs
@@ -15,6 +15,7 @@
     , SameSiteOption
     , sameSiteLax
     , sameSiteStrict
+    , sameSiteNone
       -- ** Functions
     , parseSetCookie
     , renderSetCookie
@@ -124,13 +125,14 @@
     , setCookieDomain :: Maybe S.ByteString -- ^ The domain for which the cookie should be sent. Default value: @Nothing@ (The browser defaults to the current domain).
     , setCookieHttpOnly :: Bool -- ^ Marks the cookie as "HTTP only", i.e. not accessible from Javascript. Default value: @False@
     , setCookieSecure :: Bool -- ^ Instructs the browser to only send the cookie over HTTPS. Default value: @False@
-    , setCookieSameSite :: Maybe SameSiteOption -- ^ Marks the cookie as "same site", i.e. should not be sent with cross-site requests. Default value: @Nothing@
+    , setCookieSameSite :: Maybe SameSiteOption -- ^ The "same site" policy of the cookie, i.e. whether it should be sent with cross-site requests. Default value: @Nothing@
     }
     deriving (Eq, Show)
 
 -- | Data type representing the options for a <https://tools.ietf.org/html/draft-west-first-party-cookies-07#section-4.1 SameSite cookie>
 data SameSiteOption = Lax
                     | Strict
+                    | None
                     deriving (Show, Eq)
 
 instance NFData SameSiteOption where
@@ -144,6 +146,13 @@
 sameSiteStrict :: SameSiteOption
 sameSiteStrict = Strict
 
+-- |
+-- Directs the browser to send the cookie for cross-site requests.
+--
+-- @since 0.4.5
+sameSiteNone :: SameSiteOption
+sameSiteNone = None
+
 instance NFData SetCookie where
     rnf (SetCookie a b c d e f g h i) =
         a `seq`
@@ -211,6 +220,7 @@
         Nothing -> mempty
         Just Lax -> byteStringCopy "; SameSite=Lax"
         Just Strict -> byteStringCopy "; SameSite=Strict"
+        Just None -> byteStringCopy "; SameSite=None"
     ]
 
 parseSetCookie :: S.ByteString -> SetCookie
@@ -228,6 +238,7 @@
     , setCookieSameSite = case lookup "samesite" flags of
         Just "Lax" -> Just Lax
         Just "Strict" -> Just Strict
+        Just "None" -> Just None
         _ -> Nothing
     }
   where
diff --git a/cookie.cabal b/cookie.cabal
--- a/cookie.cabal
+++ b/cookie.cabal
@@ -1,5 +1,5 @@
 name:            cookie
-version:         0.4.4
+version:         0.4.5
 license:         MIT
 license-file:    LICENSE
 author:          Michael Snoyman <michael@snoyman.com>
diff --git a/test/Spec.hs b/test/Spec.hs
--- a/test/Spec.hs
+++ b/test/Spec.hs
@@ -55,7 +55,7 @@
     arbitrary = fmap (Char' . toEnum) $ choose (62, 125)
 newtype SameSiteOption' = SameSiteOption' { unSameSiteOption' :: SameSiteOption }
 instance Arbitrary SameSiteOption' where
-  arbitrary = fmap SameSiteOption' (elements [sameSiteLax, sameSiteStrict])
+  arbitrary = fmap SameSiteOption' (elements [sameSiteLax, sameSiteStrict, sameSiteNone])
 
 propParseRenderSetCookie :: SetCookie -> Bool
 propParseRenderSetCookie sc =