diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,3 +1,14 @@
+## 3.0.3
+
+* Dropping support of GHC 7.x.
+* Add `ToLogStr` instance for `ShortByteString`. Add lower bound on
+  `bytestring` dependency to ensure that `bytestring` exports
+  `Data.ByteString.Short`.
+
+## 3.0.2
+
+* Fixing documentation.
+
 ## 3.0.1
 
 * Creating the `Internal` module.
diff --git a/System/Log/FastLogger/LogStr.hs b/System/Log/FastLogger/LogStr.hs
--- a/System/Log/FastLogger/LogStr.hs
+++ b/System/Log/FastLogger/LogStr.hs
@@ -17,6 +17,7 @@
 import qualified Data.ByteString.Builder as B
 import qualified Data.ByteString.Char8 as S8
 import qualified Data.ByteString.Lazy as BL
+import qualified Data.ByteString.Short as SBS
 #if MIN_VERSION_base(4,9,0)
 import qualified Data.Semigroup as Semi (Semigroup(..))
 #endif
@@ -78,6 +79,9 @@
 instance ToLogStr Builder where
     {-# INLINE toLogStr #-}
     toLogStr x = let b = B.toLazyByteString x in LogStr (fromIntegral (BL.length b)) (B.lazyByteString b)
+instance ToLogStr SBS.ShortByteString where
+    {-# INLINE toLogStr #-}
+    toLogStr b = LogStr (SBS.length b) (B.shortByteString b)
 instance ToLogStr String where
     {-# INLINE toLogStr #-}
     toLogStr = toLogStr . TL.pack
diff --git a/fast-logger.cabal b/fast-logger.cabal
--- a/fast-logger.cabal
+++ b/fast-logger.cabal
@@ -1,5 +1,5 @@
 Name:                   fast-logger
-Version:                3.0.2
+Version:                3.0.3
 Author:                 Kazu Yamamoto <kazu@iij.ad.jp>
 Maintainer:             Kazu Yamamoto <kazu@iij.ad.jp>
 License:                BSD3
@@ -27,11 +27,11 @@
                         System.Log.FastLogger.FileIO
                         System.Log.FastLogger.LogStr
                         System.Log.FastLogger.Logger
-  Build-Depends:        base >= 4.7 && < 5
+  Build-Depends:        base >= 4.9 && < 5
                       , array
                       , auto-update >= 0.1.2
                       , easy-file >= 0.2
-                      , bytestring
+                      , bytestring >= 0.10.4
                       , directory
                       , filepath
                       , text
@@ -52,7 +52,7 @@
   Other-Modules:    FastLoggerSpec
   Build-Tools:      hspec-discover >= 2.6
   Build-Depends:    base >= 4 && < 5
-                  , bytestring
+                  , bytestring >= 0.10.4
                   , directory
                   , fast-logger
                   , hspec