diff --git a/line.cabal b/line.cabal
--- a/line.cabal
+++ b/line.cabal
@@ -1,5 +1,5 @@
 name: line
-version: 1.0.0.1
+version: 1.0.1.0
 cabal-version: >=1.10
 build-type: Simple
 license: BSD3
@@ -38,7 +38,7 @@
         Line.Messaging.Webhook.Types
         Line.Messaging.Webhook.Validation
     build-depends:
-        base >=4.7 && <5,
+        base >=4.8 && <5,
         wai >=3.2.1.1 && <3.3,
         http-types >=0.9.1 && <0.10,
         aeson >=0.11.2.1 && <0.12,
@@ -60,7 +60,7 @@
     main-is: Spec.hs
     build-depends:
         base >=4.9.0.0 && <4.10,
-        line >=1.0.0.1 && <1.1
+        line >=1.0.1.0 && <1.1
     default-language: Haskell2010
     default-extensions: OverloadedStrings
     hs-source-dirs: test
diff --git a/src/Line/Messaging/API.hs b/src/Line/Messaging/API.hs
--- a/src/Line/Messaging/API.hs
+++ b/src/Line/Messaging/API.hs
@@ -33,7 +33,7 @@
 import Data.Aeson (ToJSON(..), (.=), object, decode', eitherDecode')
 import Data.Text.Encoding (encodeUtf8)
 import Line.Messaging.API.Types
-import Line.Messaging.Types (ChannelAccessToken, ReplyToken)
+import Line.Messaging.Types (ReplyToken)
 import qualified Data.ByteString as B
 import qualified Data.ByteString.Lazy as BL
 import qualified Data.Text as T
diff --git a/src/Line/Messaging/Webhook.hs b/src/Line/Messaging/Webhook.hs
--- a/src/Line/Messaging/Webhook.hs
+++ b/src/Line/Messaging/Webhook.hs
@@ -19,7 +19,6 @@
 import Data.ByteString.Builder (string8)
 import Line.Messaging.Webhook.Types
 import Line.Messaging.Webhook.Validation (validateSignature)
-import Line.Messaging.Types (ChannelSecret)
 import Network.HTTP.Types.Status
 import Network.Wai