diff --git a/scotty-utils.cabal b/scotty-utils.cabal
--- a/scotty-utils.cabal
+++ b/scotty-utils.cabal
@@ -1,5 +1,5 @@
 name:                scotty-utils
-version:             0.1.0.0
+version:             0.2.0.0
 synopsis:            Scotty utils library
 description:         Scotty utils library.
 homepage:            https://github.com/Lupino/yuntan-common/tree/master/scotty-utils#readme
@@ -19,7 +19,7 @@
   exposed-modules:     Web.Scotty.Utils
   build-depends:       base >= 4.7 && < 5
                      , http-types
-                     , aeson
+                     , aeson >= 2.0
                      , scotty
                      , text
                      , aeson-result
diff --git a/src/Web/Scotty/Utils.hs b/src/Web/Scotty/Utils.hs
--- a/src/Web/Scotty/Utils.hs
+++ b/src/Web/Scotty/Utils.hs
@@ -19,7 +19,7 @@
 import qualified Data.Aeson.Result  as R (Err, List, err, fromList, fromOk, ok)
 
 import           Data.Aeson         (ToJSON)
-import           Data.Text          (Text)
+import           Data.Aeson.Key     (Key)
 import qualified Data.Text.Lazy     as LT (Text)
 
 maybeNotFound :: (ToJSON a, ScottyError e, Monad m) => String -> Maybe a -> ActionT e m ()
@@ -37,7 +37,7 @@
 err :: (ScottyError e, Monad m) => Status -> String -> ActionT e m ()
 err st msg = status st >> json (R.err msg)
 
-ok :: (ToJSON a, ScottyError e, Monad m) => Text -> a -> ActionT e m ()
+ok :: (ToJSON a, ScottyError e, Monad m) => Key -> a -> ActionT e m ()
 ok key = json . R.fromOk key . R.ok
 
 errNotFound :: (ScottyError e, Monad m) => String -> ActionT e m ()
@@ -46,7 +46,7 @@
 errBadRequest :: (ScottyError e, Monad m) => String -> ActionT e m ()
 errBadRequest = err status400
 
-okListResult :: (ToJSON a, ScottyError e, Monad m) => Text -> R.List a -> ActionT e m ()
+okListResult :: (ToJSON a, ScottyError e, Monad m) => Key -> R.List a -> ActionT e m ()
 okListResult key = json . R.fromList key
 
 safeParam ::(Parsable a, ScottyError e, Monad m) => LT.Text -> a -> ActionT e m a