diff --git a/src/Yam.hs b/src/Yam.hs
--- a/src/Yam.hs
+++ b/src/Yam.hs
@@ -134,7 +134,7 @@
   sw@SwaggerConfig{..} <- require  "swagger"
   withLogger name c $ \logger -> unSalak $ do
     let portText = showText port
-        baseCxt = (LF logger :. EmptyContext)
+        baseCxt  = LF logger :. EmptyContext
     logInfo $ "Start Service [" <> name <> "] ..."
     amd <- mkAMD
     ser <- mkSer
diff --git a/src/Yam/Logger.hs b/src/Yam/Logger.hs
--- a/src/Yam/Logger.hs
+++ b/src/Yam/Logger.hs
@@ -73,7 +73,7 @@
 withLogger :: (MonadUnliftIO m) => Text -> IO LogConfig -> (LogFunc -> LoggingT m a) -> m a
 withLogger n lc action = do
   f <- askRunInIO
-  liftIO $ bracket (newLogger n lc) (snd) $ f . runLoggingT (askLoggerIO >>= action) . fst
+  liftIO $ bracket (newLogger n lc) snd $ f . runLoggingT (askLoggerIO >>= action) . fst
 
 addTrace :: LogFunc -> Text -> LogFunc
 addTrace f tid a b c d = let p = "[" <> toLogStr tid <> "] " in f a b c (p <> d)
diff --git a/src/Yam/Middleware/Client.hs b/src/Yam/Middleware/Client.hs
--- a/src/Yam/Middleware/Client.hs
+++ b/src/Yam/Middleware/Client.hs
@@ -37,7 +37,7 @@
       , managerIdleConnectionCount = idleCount
       }
 
-data HttpClient = HttpClient Manager
+newtype HttpClient = HttpClient Manager
 
 type HasHttpClient cxt = (HasLogger cxt, HasContextEntry cxt HttpClient)
 
diff --git a/src/Yam/Prelude.hs b/src/Yam/Prelude.hs
--- a/src/Yam/Prelude.hs
+++ b/src/Yam/Prelude.hs
@@ -118,7 +118,7 @@
 showText :: Show a => a -> Text
 showText = pack . show
 
-data WebErrResult = WebErrResult
+newtype WebErrResult = WebErrResult
   { message :: Text
   }
 
diff --git a/src/Yam/Server/Refresh.hs b/src/Yam/Server/Refresh.hs
--- a/src/Yam/Server/Refresh.hs
+++ b/src/Yam/Server/Refresh.hs
@@ -11,7 +11,7 @@
 
 refreshEndpoint :: (HasLogger cxt, MonadIO m) => IO ReloadResult -> Bool -> AppT cxt m Text
 refreshEndpoint io True = do
-  ReloadResult{..} <- liftIO $ io
+  ReloadResult{..} <- liftIO io
   if isError
     then throwS err400 $ showMsg msg
     else return $ showMsg msg
diff --git a/yam.cabal b/yam.cabal
--- a/yam.cabal
+++ b/yam.cabal
@@ -1,6 +1,6 @@
 cabal-version: 1.12
 name: yam
-version: 0.6.1
+version: 0.6.2
 license: BSD3
 license-file: LICENSE
 copyright: (c) 2018 Daniel YU
@@ -58,11 +58,11 @@
         binary >=0.8.6.0 && <0.9,
         bytestring >=0.10.8.2 && <0.11,
         data-default >=0.7.1.1 && <0.8,
-        exceptions >=0.10.1 && <0.11,
+        exceptions >=0.10.2 && <0.11,
         fast-logger >=2.4.15 && <2.5,
         http-client >=0.6.4 && <0.7,
         http-types >=0.12.3 && <0.13,
-        lens ==4.17.*,
+        lens >=4.17.1 && <4.18,
         menshen >=0.0.3 && <0.1,
         monad-logger >=0.3.30 && <0.4,
         mtl >=2.2.2 && <2.3,
@@ -72,17 +72,17 @@
         scientific >=0.3.6.2 && <0.4,
         servant-client ==0.16.*,
         servant-server ==0.16.*,
-        servant-swagger >=1.1.7 && <1.2,
-        servant-swagger-ui >=0.3.2.3.19.3 && <0.4,
-        swagger2 >=2.3.1.1 && <2.4,
+        servant-swagger >=1.1.7.1 && <1.2,
+        servant-swagger-ui >=0.3.3.3.22.2 && <0.4,
+        swagger2 ==2.4.*,
         text >=1.2.3.1 && <1.3,
         transformers >=0.5.6.2 && <0.6,
         unliftio-core >=0.1.2.0 && <0.2,
         unordered-containers >=0.2.10.0 && <0.3,
         vault >=0.3.1.2 && <0.4,
-        vector >=0.12.0.2 && <0.13,
+        vector >=0.12.0.3 && <0.13,
         wai >=3.2.2 && <3.3,
-        warp >=3.2.26 && <3.3
+        warp >=3.2.27 && <3.3
 
 test-suite spec
     type: exitcode-stdio-1.0
@@ -122,19 +122,19 @@
                         TypeSynonymInstances ViewPatterns
     ghc-options: -Wall
     build-depends:
-        QuickCheck >=2.12.6.1 && <2.14,
+        QuickCheck >=2.13.1 && <2.14,
         aeson >=1.4.2.0 && <1.5,
         base >=4.10 && <5,
         base16-bytestring >=0.1.1.6 && <0.2,
         binary >=0.8.6.0 && <0.9,
         bytestring >=0.10.8.2 && <0.11,
         data-default >=0.7.1.1 && <0.8,
-        exceptions >=0.10.1 && <0.11,
+        exceptions >=0.10.2 && <0.11,
         fast-logger >=2.4.15 && <2.5,
         hspec ==2.*,
         http-client >=0.6.4 && <0.7,
         http-types >=0.12.3 && <0.13,
-        lens ==4.17.*,
+        lens >=4.17.1 && <4.18,
         menshen >=0.0.3 && <0.1,
         monad-logger >=0.3.30 && <0.4,
         mtl >=2.2.2 && <2.3,
@@ -144,14 +144,14 @@
         scientific >=0.3.6.2 && <0.4,
         servant-client ==0.16.*,
         servant-server ==0.16.*,
-        servant-swagger >=1.1.7 && <1.2,
-        servant-swagger-ui >=0.3.2.3.19.3 && <0.4,
-        swagger2 >=2.3.1.1 && <2.4,
+        servant-swagger >=1.1.7.1 && <1.2,
+        servant-swagger-ui >=0.3.3.3.22.2 && <0.4,
+        swagger2 ==2.4.*,
         text >=1.2.3.1 && <1.3,
         transformers >=0.5.6.2 && <0.6,
         unliftio-core >=0.1.2.0 && <0.2,
         unordered-containers >=0.2.10.0 && <0.3,
         vault >=0.3.1.2 && <0.4,
-        vector >=0.12.0.2 && <0.13,
+        vector >=0.12.0.3 && <0.13,
         wai >=3.2.2 && <3.3,
-        warp >=3.2.26 && <3.3
+        warp >=3.2.27 && <3.3