diff --git a/src/Web/Stripe/Card.hs b/src/Web/Stripe/Card.hs
--- a/src/Web/Stripe/Card.hs
+++ b/src/Web/Stripe/Card.hs
@@ -17,7 +17,7 @@
 -- | Represents a credit card in the Stripe system.
 data Card = Card
     { cardType     :: T.Text
-    , cardCountry  :: T.Text
+    , cardCountry  :: Maybe T.Text
     , cardLastFour :: T.Text
     , cardExpMonth :: Int
     , cardExpYear  :: Int
diff --git a/src/Web/Stripe/Client.hs b/src/Web/Stripe/Client.hs
--- a/src/Web/Stripe/Client.hs
+++ b/src/Web/Stripe/Client.hs
@@ -246,7 +246,7 @@
 query_ :: MonadIO m => StripeRequest -> StripeT m ()
 query_ req = query' req >> return ()
 
-setUserAgent :: C8.ByteString -> Request m -> Request m
+setUserAgent :: C8.ByteString -> Request -> Request
 setUserAgent ua req = req { requestHeaders = ("User-Agent", ua) : filteredHeaders }
   where
     filteredHeaders = filter ((/= "User-Agent") . fst) $ requestHeaders req
@@ -255,7 +255,7 @@
 --   make an authenticated query to the Stripe server.
 --   _TODO there is lots of sloppy Text <-> String stuff here.. should fix
 
-prepRq :: Monad m => StripeConfig -> StripeRequest -> Maybe (Request m)
+prepRq :: StripeConfig -> StripeRequest -> Maybe Request
 prepRq StripeConfig{..} StripeRequest{..} =
     flip fmap mReq $ \req -> applyBasicAuth k p $ (addBodyUa req)
     { queryString = renderQuery False qs
diff --git a/stripe.cabal b/stripe.cabal
--- a/stripe.cabal
+++ b/stripe.cabal
@@ -1,5 +1,5 @@
 Name:                stripe
-Version:             0.4.0.0
+Version:             0.5.0.0
 Synopsis:            A Haskell implementation of the Stripe API.
 Description:         This is an implementation of the Stripe API as it is
                      documented at https:\/\/stripe.com\/docs\/api
@@ -37,7 +37,7 @@
                         , aeson                >= 0.6.1   && < 0.7
                         , unordered-containers >= 0.1.4.6 && < 0.3
                         , time                 >= 1.0.0   && < 1.5
-                        , http-conduit         >= 1.4.1.2 && < 2.0
+                        , http-conduit         >= 2.0.0   && < 2.0.1
                         , http-types           >= 0.6.11  && < 0.9
                         , bytestring           >= 0.9     && < 0.11
                         , mtl                  >= 2.1     && < 2.2