diff --git a/scotty-cookie.cabal b/scotty-cookie.cabal
--- a/scotty-cookie.cabal
+++ b/scotty-cookie.cabal
@@ -1,5 +1,5 @@
 name:                scotty-cookie
-version:             0.1.0.2
+version:             0.1.0.3
 synopsis:            Cookie management helper functions for Scotty framework
 description:         Cookie management helper functions for Scotty framework
 homepage:            https://bitbucket.org/wniare/scotty-cookie
diff --git a/src/Web/Scotty/Cookie.hs b/src/Web/Scotty/Cookie.hs
--- a/src/Web/Scotty/Cookie.hs
+++ b/src/Web/Scotty/Cookie.hs
@@ -68,7 +68,7 @@
 setCookie :: (Monad m, ScottyError e)
           => SetCookie
           -> ActionT e m ()
-setCookie c = setHeader "Set-Cookie" (TL.decodeUtf8 . toLazyByteString $ renderSetCookie c)
+setCookie c = addHeader "Set-Cookie" (TL.decodeUtf8 . toLazyByteString $ renderSetCookie c)
 
 
 -- | 'makeSimpleCookie' and 'setCookie' combined.