diff --git a/src/Yesod/Auth/Zendesk.hs b/src/Yesod/Auth/Zendesk.hs
--- a/src/Yesod/Auth/Zendesk.hs
+++ b/src/Yesod/Auth/Zendesk.hs
@@ -12,7 +12,6 @@
 import Control.Monad.IO.Class (MonadIO, liftIO)
 import Data.Default (Default(..))
 import Data.List (intersperse)
-import Data.Monoid ((<>))
 import Data.Text (Text)
 import Data.Time (getCurrentTime, formatTime)
 import Language.Haskell.TH.Syntax (Pred(ClassP), Type(VarT), mkName)
@@ -224,4 +223,4 @@
                addParams getParams
 
   -- Redirect to Zendesk
-  redirect $ zendeskAuthURL y <> TE.decodeUtf8 params
+  redirect $ zendeskAuthURL y `T.append` TE.decodeUtf8 params
diff --git a/yesod-auth-zendesk.cabal b/yesod-auth-zendesk.cabal
--- a/yesod-auth-zendesk.cabal
+++ b/yesod-auth-zendesk.cabal
@@ -1,5 +1,5 @@
 Name:                yesod-auth-zendesk
-Version:             0.1.0.1
+Version:             0.1.0.2
 Synopsis:            Zendesk remote authentication support for Yesod apps.
 Homepage:            https://github.com/meteficha/yesod-auth-zendesk
 License:             BSD3