diff --git a/example/Facebook/test.hs b/example/Facebook/test.hs
--- a/example/Facebook/test.hs
+++ b/example/Facebook/test.hs
@@ -37,11 +37,11 @@
     mgr <- newManager conduitManagerSettings
     let (url, body) = accessTokenUrl facebookKey code
     resp <- doJSONPostRequest mgr facebookKey url (body ++ [("state", "test")])
-    print (resp :: OAuth2Result AccessToken)
-    case resp of
-      Right token -> print token
-        --userinfo mgr token >>= print
-        --userinfo' mgr token >>= print
+    case (resp :: OAuth2Result AccessToken) of
+      Right token -> do
+                     print token
+                     --userinfo mgr token >>= print
+                     userinfo' mgr token >>= print
       Left l -> print l
     closeManager mgr
 
diff --git a/example/Keys.hs.sample b/example/Keys.hs.sample
--- a/example/Keys.hs.sample
+++ b/example/Keys.hs.sample
@@ -27,15 +27,15 @@
                    , oauthClientSecret = "xxxxxxxxxxxxxxxxxxxxxx"
                    , oauthCallback = Just "http://127.0.0.1:9988/googleCallback"
                    , oauthOAuthorizeEndpoint = "https://accounts.google.com/o/oauth2/auth"
-                   , oauthAccessTokenEndpoint = "https://accounts.google.com/o/oauth2/token"
+                   , oauthAccessTokenEndpoint = "https://www.googleapis.com/oauth2/v3/token"
                    }
 
 facebookKey :: OAuth2
 facebookKey = OAuth2 { oauthClientId = "xxxxxxxxxxxxxxx"
                      , oauthClientSecret = "xxxxxxxxxxxxxxxxxxxxxx"
-                     , oauthCallback = Just "https://developers.facebook.com/tools/debug"
+                     , oauthCallback = Just "http://test.com/cb"
                      , oauthOAuthorizeEndpoint = "https://www.facebook.com/dialog/oauth"
-                     , oauthAccessTokenEndpoint = "https://graph.facebook.com/oauth/access_token"
+                     , oauthAccessTokenEndpoint = "https://graph.facebook.com/v2.3/oauth/access_token"
                      }
 
 doubanKey :: OAuth2
diff --git a/hoauth2.cabal b/hoauth2.cabal
--- a/hoauth2.cabal
+++ b/hoauth2.cabal
@@ -1,6 +1,6 @@
 Name:                hoauth2
--- (http://www.haskell.org/haskellwiki/Package_versioning_policy)
-Version:             0.4.6
+-- https://wiki.haskell.org/Package_versioning_policy
+Version:             0.4.7
 
 Synopsis:            hoauth2
 Description:
@@ -60,7 +60,7 @@
     base              >= 4      && < 5,
     aeson             >= 0.7    && < 0.9,
     text              >= 0.11   && < 1.3,
-    bytestring        >= 0.10.4 && < 0.10.5,
+    bytestring        >= 0.9    && < 0.11,
     http-conduit      >= 2.0    && < 2.2,
     http-types        >= 0.8    && < 0.9