diff --git a/fast-logger/System/Log/FastLogger.hs b/fast-logger/System/Log/FastLogger.hs
index 6ecdbcf..8506fbc 100644
--- a/fast-logger/System/Log/FastLogger.hs
+++ b/fast-logger/System/Log/FastLogger.hs
@@ -43,6 +43,8 @@ module System.Log.FastLogger (
   , module System.Log.FastLogger.Date
   -- * File rotation
   , module System.Log.FastLogger.File
+  -- * Types
+  , module System.Log.FastLogger.Types
   ) where

 #if __GLASGOW_HASKELL__ < 709
@@ -63,6 +65,7 @@ import System.Log.FastLogger.IORef
 import System.Log.FastLogger.LogStr
 import System.Log.FastLogger.Logger
 import System.Log.FastLogger.Date
+import System.Log.FastLogger.Types

 ----------------------------------------------------------------

diff --git a/fast-logger/System/Log/FastLogger/Date.hs b/fast-logger/System/Log/FastLogger/Date.hs
index ceb6f5d..d9666d7 100644
--- a/fast-logger/System/Log/FastLogger/Date.hs
+++ b/fast-logger/System/Log/FastLogger/Date.hs
@@ -4,18 +4,15 @@
 -- |
 -- Formatting time is slow.
 -- This package provides mechanisms to cache formatted date.
-module System.Log.FastLogger.Date (
-  -- * Types
-    TimeFormat
-  , FormattedTime
-  -- * Date cacher
-  , newTimeCache
+module System.Log.FastLogger.Date
+  ( -- * Date cacher
+    newTimeCache
   , simpleTimeFormat
   , simpleTimeFormat'
   ) where

 import Control.AutoUpdate (mkAutoUpdate, defaultUpdateSettings, updateAction)
-import Data.ByteString (ByteString)
+import System.Log.FastLogger.Types (TimeFormat, FormattedTime)
 #if WINDOWS
 import qualified Data.ByteString.Char8 as BS
 import Data.Time (UTCTime, formatTime, getCurrentTime, utcToLocalZonedTime)
@@ -31,12 +28,6 @@ import System.Posix (EpochTime, epochTime)

 ----------------------------------------------------------------

--- | Type aliaes for date format and formatted date.
-type FormattedTime = ByteString
-type TimeFormat = ByteString
-
-----------------------------------------------------------------
-
 #if WINDOWS
 -- | Get date using UTC.
 getTime :: IO UTCTime
diff --git a/fast-logger/System/Log/FastLogger/File.hs b/fast-logger/System/Log/FastLogger/File.hs
index 4952e3e..84b9587 100644
--- a/fast-logger/System/Log/FastLogger/File.hs
+++ b/fast-logger/System/Log/FastLogger/File.hs
@@ -13,9 +13,7 @@ import Data.ByteString (ByteString)
 import Data.ByteString.Char8 (unpack)
 import System.Directory (doesFileExist, doesDirectoryExist, getPermissions, writable, renameFile)
 import System.FilePath (takeDirectory, dropFileName, takeFileName, (</>))
-
-type TimeFormat = ByteString -- redeclaration to allow for LANGUAGE Safe
-type FormattedTime = ByteString -- redeclaration to allow for LANGUAGE Safe
+import System.Log.FastLogger.Types (TimeFormat, FormattedTime)

 -- | The spec for logging files
 data FileLogSpec = FileLogSpec {
diff --git a/fast-logger/System/Log/FastLogger/Types.hs b/fast-logger/System/Log/FastLogger/Types.hs
new file mode 100644
index 0000000..682b7d0
--- /dev/null
+++ b/fast-logger/System/Log/FastLogger/Types.hs
@@ -0,0 +1,13 @@
+module System.Log.FastLogger.Types (
+  -- * Types
+    TimeFormat
+  , FormattedTime
+  ) where
+
+import Data.ByteString (ByteString)
+
+----------------------------------------------------------------
+
+-- | Type aliaes for date format and formatted date.
+type FormattedTime = ByteString
+type TimeFormat = ByteString
diff --git a/fast-logger/fast-logger.cabal b/fast-logger/fast-logger.cabal
index 40aa884..8646fd4 100644
--- a/fast-logger/fast-logger.cabal
+++ b/fast-logger/fast-logger.cabal
@@ -17,6 +17,7 @@ Library
   Exposed-Modules:      System.Log.FastLogger
                         System.Log.FastLogger.File
                         System.Log.FastLogger.Date
+                        System.Log.FastLogger.Types
   Other-Modules:        System.Log.FastLogger.IO
                         System.Log.FastLogger.FileIO
                         System.Log.FastLogger.IORef