diff --git a/OpenId2/Discovery.hs b/OpenId2/Discovery.hs
index 298ea885..f5ed0216 100644
--- a/OpenId2/Discovery.hs
+++ b/OpenId2/Discovery.hs
@@ -69,7 +69,7 @@ discoverYADIS :: ( MonadIO m
 discoverYADIS _ _ 0 = failure TooManyRedirects
 discoverYADIS ident mb_loc redirects = do
     let uri = fromMaybe (identifier ident) mb_loc
-    req <- parseUrl $ S8.pack uri
+    req <- parseUrl uri
     res <- liftIO $ withManager $ httpLbs req
     let mloc = fmap S8.unpack
              $ lookup "x-xrds-location"
@@ -117,7 +117,7 @@ discoverHTML :: ( MonadIO m, Failure HttpException m)
              => Identifier
              -> m (Maybe Discovery)
 discoverHTML ident'@(Identifier ident) =
-    (parseHTML ident' . BSLU.toString) `liftM` simpleHttp (S8.pack ident)
+    (parseHTML ident' . BSLU.toString) `liftM` simpleHttp ident
 
 -- | Parse out an OpenID endpoint and an actual identifier from an HTML
 -- document.
diff --git a/Web/Authenticate/Facebook.hs b/Web/Authenticate/Facebook.hs
index 2c162f32..52862398 100644
--- a/Web/Authenticate/Facebook.hs
+++ b/Web/Authenticate/Facebook.hs
@@ -64,7 +64,7 @@ accessTokenUrl fb code =
 getAccessToken :: Facebook -> Text -> IO AccessToken
 getAccessToken fb code = do
     let url = accessTokenUrl fb code
-    b <- simpleHttp url
+    b <- simpleHttp $ S8.unpack url
     let (front, back) = splitAt 13 $ L8.unpack b
     case front of
         "access_token=" -> return $ AccessToken $ T.pack back
@@ -80,7 +80,7 @@ graphUrl (AccessToken s) func =
 getGraphData :: AccessToken -> Text -> IO (Either String Value)
 getGraphData at func = do
     let url = graphUrl at func
-    b <- simpleHttp url
+    b <- simpleHttp $ S8.unpack url
     return $ eitherResult $ parse json b
 
 getGraphData' :: AccessToken -> Text -> IO Value
diff --git a/Web/Authenticate/OAuth.hs b/Web/Authenticate/OAuth.hs
index d58ff2bc..6ed25791 100644
--- a/Web/Authenticate/OAuth.hs
+++ b/Web/Authenticate/OAuth.hs
@@ -33,7 +33,6 @@ import Numeric
 import Codec.Crypto.RSA (rsassa_pkcs1_v1_5_sign, ha_SHA1, PrivateKey(..))
 import Network.HTTP.Types (Header)
 import Control.Arrow (second)
-import qualified Data.ByteString.Char8 as S8
 import Blaze.ByteString.Builder (toByteString)
 import Data.Enumerator (($$), run_, Stream (..), continue)
 import Data.Monoid (mconcat)
@@ -91,7 +90,7 @@ fromStrict = BSL.fromChunks . return
 getTemporaryCredential :: OAuth         -- ^ OAuth Application
                        -> IO Credential -- ^ Temporary Credential (Request Token & Secret).
 getTemporaryCredential oa = do
-  let req = fromJust $ parseUrl $ S8.pack $ oauthRequestUri oa
+  let req = fromJust $ parseUrl $ oauthRequestUri oa
   req' <- signOAuth oa emptyCredential (req { method = "POST" }) 
   rsp <- withManager $ httpLbs req'
   let dic = parseQueryString . toStrict . responseBody $ rsp
@@ -109,7 +108,7 @@ getAccessToken, getTokenCredential
                -> Credential    -- ^ Temporary Credential with oauth_verifier
                -> IO Credential -- ^ Token Credential (Access Token & Secret)
 getAccessToken oa cr = do
-  let req = (fromJust $ parseUrl $ S8.pack $ oauthAccessTokenUri oa) { method = "POST" }
+  let req = (fromJust $ parseUrl $ oauthAccessTokenUri oa) { method = "POST" }
   rsp <- signOAuth oa cr req >>= withManager . httpLbs
   let dic = parseQueryString . toStrict . responseBody $ rsp
   return $ Credential dic
diff --git a/Web/Authenticate/OpenId.hs b/Web/Authenticate/OpenId.hs
index bb5cc508..752dfc3e 100644
--- a/Web/Authenticate/OpenId.hs
+++ b/Web/Authenticate/OpenId.hs
@@ -14,7 +14,6 @@ import OpenId2.Types
 import Web.Authenticate.Internal (qsUrl)
 import Control.Monad (unless)
 import qualified Data.ByteString.UTF8 as BSU
-import qualified Data.ByteString.Char8 as S8
 import qualified Data.ByteString.Lazy.UTF8 as BSLU
 import Network.HTTP.Enumerator
     ( parseUrl, urlEncodedBody, responseBody, httpLbsRedirect
@@ -88,7 +87,7 @@ authenticate params = do
     let params' = map (BSU.fromString *** BSU.fromString)
                 $ ("openid.mode", "check_authentication")
                 : filter (\(k, _) -> k /= "openid.mode") params
-    req' <- parseUrl $ S8.pack endpoint
+    req' <- parseUrl endpoint
     let req = urlEncodedBody params' req'
     rsp <- liftIO $ withManager $ httpLbsRedirect req
     let rps = parseDirectResponse $ BSLU.toString $ responseBody rsp
diff --git a/authenticate.cabal b/authenticate.cabal
index 05455d66..b7d6f3c9 100644
--- a/authenticate.cabal
+++ b/authenticate.cabal
@@ -16,7 +16,7 @@ homepage:        http://github.com/snoyberg/authenticate/tree/master
 library
     build-depends:   base >= 4 && < 5,
                      aeson >= 0.3.1.1 && < 0.4,
-                     http-enumerator >= 0.5.1 && < 0.6,
+                     http-enumerator >= 0.6 && < 0.7,
                      tagsoup >= 0.6 && < 0.13,
                      failure >= 0.0.0 && < 0.2,
                      transformers >= 0.1 && < 0.3,