diff --git a/Yesod/Auth/OAuth2.hs b/Yesod/Auth/OAuth2.hs
index cf350fe..72fcd2a 100644
--- a/Yesod/Auth/OAuth2.hs
+++ b/Yesod/Auth/OAuth2.hs
@@ -22,6 +22,7 @@ import Data.Text.Encoding (decodeUtf8With, encodeUtf8)
 import Data.Text.Encoding.Error (lenientDecode)
 import Data.Typeable
 import Network.OAuth.OAuth2
+import Network.HTTP.Conduit(Manager)
 import Yesod.Auth
 import Yesod.Core
 import Yesod.Form
@@ -41,7 +42,7 @@ oauth2Url name = PluginR name ["forward"]
 authOAuth2 :: YesodAuth m
            => Text   -- ^ Service name
            -> OAuth2 -- ^ Service details
-           -> (AccessToken -> IO (Creds m))
+           -> (Manager -> AccessToken -> IO (Creds m))
            -- ^ This function defines how to take an @'AccessToken'@ and
            --   retrieve additional information about the user, to be
            --   set in the session as @'Creds'@. Usually this means a
@@ -64,11 +65,12 @@ authOAuth2 name oauth getCreds = AuthPlugin name dispatch login
         dispatch "GET" ["callback"] = do
             code <- lift $ runInputGet $ ireq textField "code"
             oauth' <- withCallback
-            result <- liftIO $ fetchAccessToken oauth' (encodeUtf8 code)
+            master <- lift getYesod
+            result <- liftIO $ fetchAccessToken (authHttpManager master) oauth' (encodeUtf8 code)
             case result of
                 Left _ -> permissionDenied "Unable to retreive OAuth2 token"
                 Right token -> do
-                    creds <- liftIO $ getCreds token
+                    creds <- liftIO $ getCreds (authHttpManager master) token
                     lift $ setCredsRedirect creds
 
         dispatch _ _ = notFound
diff --git a/Yesod/Auth/OAuth2/Learn.hs b/Yesod/Auth/OAuth2/Learn.hs
index a26f0f7..eca9040 100644
--- a/Yesod/Auth/OAuth2/Learn.hs
+++ b/Yesod/Auth/OAuth2/Learn.hs
@@ -20,6 +20,7 @@ import Data.Text (Text)
 import Data.Text.Encoding (encodeUtf8)
 import Yesod.Auth
 import Yesod.Auth.OAuth2
+import Network.HTTP.Conduit(Manager)
 import qualified Data.Text as T
 
 data LearnUser = LearnUser
@@ -60,10 +61,10 @@ oauth2Learn clientId clientSecret = authOAuth2 "learn"
         })
     fetchLearnProfile
 
-fetchLearnProfile :: AccessToken -> IO (Creds m)
-fetchLearnProfile token = do
-    result <- authGetJSON token "http://learn.thoughtbot.com/api/v1/me.json"
-
+fetchLearnProfile :: Manager -> AccessToken -> IO (Creds m)
+fetchLearnProfile manager token = do
+    result <- authGetJSON manager token "http://learn.thoughtbot.com/api/v1/me.json"
+    
     case result of
         Right (LearnResponse user) -> return $ toCreds user
         Left err -> throwIO $ InvalidProfileResponse "learn" err
diff --git a/yesod-auth-oauth2.cabal b/yesod-auth-oauth2.cabal
index 0364de1..4e4d4f8 100644
--- a/yesod-auth-oauth2.cabal
+++ b/yesod-auth-oauth2.cabal
@@ -30,7 +30,7 @@ library
                    , text                    >= 0.7       && < 2.0
                    , yesod-form              >= 1.3       && < 1.4
                    , transformers            >= 0.2.2     && < 0.4
-                   , hoauth2                 >= 0.3.6     && < 0.4
+                   , hoauth2                 >= 0.4.1     && < 0.5
                    , lifted-base             >= 0.2       && < 0.4
 
     exposed-modules: Yesod.Auth.OAuth2