diff --git a/GenerateJSONParser.hs b/GenerateJSONParser.hs
--- a/GenerateJSONParser.hs
+++ b/GenerateJSONParser.hs
@@ -13,6 +13,7 @@
 import           Data.List                 (partition)
 import           System.Exit
 import           System.IO                 (stdin, stderr, stdout, IOMode(..))
+--import           System.IO.Posix.MMap      (mmapFileByteString)
 import           System.FilePath           (splitExtension)
 import           System.Process            (system)
 import qualified Data.ByteString.Lazy.Char8 as BSL
@@ -59,12 +60,13 @@
 -- @FilePath@, extracted @Type@, and a JSON @Value@.
 extractTypeFromJSONFile :: FilePath -> IO (Maybe (FilePath, Type, Value))
 extractTypeFromJSONFile inputFilename =
-      withFileOrHandle inputFilename ReadMode stdin $ \hIn ->
+      withFileOrHandle inputFilename ReadMode stdin $ \hInput ->
         -- First we decode JSON input into Aeson's Value type
-        do bs <- preprocess <$> BSL.hGetContents hIn
-           Text.hPutStrLn stderr $ "Processing " `Text.append` Text.pack (show inputFilename)
-           myTrace ("Decoded JSON: " ++ pretty (decode bs :: Maybe Value))
-           case decode bs of
+        do Text.hPutStrLn stderr $ "Processing " `Text.append` Text.pack (show inputFilename)
+           decodedJSON :: Maybe Value <- decode <$> BSL.hGetContents hInput
+           --let decodedJSON :: Maybe Value =  decodeValue input
+           -- myTrace ("Decoded JSON: " ++ pretty decoded)
+           case decodedJSON of
              Nothing -> do report $ "Cannot decode JSON input from " `Text.append` Text.pack (show inputFilename)
                            return Nothing
              Just v  -> do -- If decoding JSON was successful...
diff --git a/changelog.md b/changelog.md
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,10 @@
 Changelog
 =========
+    1.0.11  Mar 2016
+
+        * Updated to GHC 8.0
+
+
     1.0.10  Sep 2015
 
         * Fixed bug appeared with aeson 0.10 breaking change:
diff --git a/json-autotype.cabal b/json-autotype.cabal
--- a/json-autotype.cabal
+++ b/json-autotype.cabal
@@ -1,6 +1,6 @@
 -- Build information for the package.
 name:                json-autotype
-version:             1.0.10
+version:             1.0.11
 synopsis:            Automatic type declaration for JSON input data
 description:         Generates datatype declarations with Aeson's "FromJSON" instances
                      from a set of example ".json" files.
@@ -60,9 +60,9 @@
   other-modules:
                        -- internal module
                        Data.Aeson.AutoType.Util
-  build-depends:       base                 >=4.3  && <4.9,
+  build-depends:       base                 >=4.3  && <4.10,
                        GenericPretty        >=1.2  && <1.3,
-                       aeson                >=0.7  && <0.11,
+                       aeson                >=0.7  && <0.12,
                        bytestring           >=0.9  && <0.11,
                        containers           >=0.3  && <0.6,
                        filepath             >=1.3  && <1.5,
@@ -70,9 +70,10 @@
                        hint                 >=0.3  && <0.5,
                        hflags               >=0.3  && <0.5,
                        lens                 >=4.1  && <4.14,
+                       mmap                 >=0.5  && <0.6,
                        mtl                  >=2.1  && <2.3,
                        pretty               >=1.1  && <1.3,
-                       process              >=1.1  && <1.4,
+                       process              >=1.1  && <1.5,
                        scientific           >=0.3  && <0.5,
                        text                 >=1.1  && <1.4,
                        uniplate             >=1.6  && <1.7,
@@ -99,9 +100,9 @@
                        DeriveDataTypeable,
                        DeriveGeneric,
                        RecordWildCards
-  build-depends:       base                 >=4.3  && <4.9,
+  build-depends:       base                 >=4.3  && <4.10,
                        GenericPretty        >=1.2  && <1.3,
-                       aeson                >=0.7  && <0.11,
+                       aeson                >=0.7  && <0.12,
                        bytestring           >=0.9  && <0.11,
                        containers           >=0.3  && <0.6,
                        filepath             >=1.3  && <1.5,
@@ -111,7 +112,7 @@
                        lens                 >=4.1  && <4.14,
                        mtl                  >=2.1  && <2.3,
                        pretty               >=1.1  && <1.3,
-                       process              >=1.1  && <1.4,
+                       process              >=1.1  && <1.5,
                        scientific           >=0.3  && <0.5,
                        text                 >=1.1  && <1.4,
                        uniplate             >=1.6  && <1.7,
@@ -139,9 +140,9 @@
                        DeriveDataTypeable,
                        DeriveGeneric,
                        RecordWildCards
-  build-depends:       base                 >=4.3  && <4.9,
+  build-depends:       base                 >=4.3  && <4.10,
                        GenericPretty        >=1.2  && <1.3,
-                       aeson                >=0.7  && <0.11,
+                       aeson                >=0.7  && <0.12,
                        bytestring           >=0.9  && <0.11,
                        containers           >=0.3  && <0.6,
                        directory            >=1.1  && <1.3,
@@ -150,7 +151,7 @@
                        lens                 >=4.1  && <4.14,
                        mtl                  >=2.1  && <2.3,
                        pretty               >=1.1  && <1.3,
-                       process              >=1.1  && <1.4,
+                       process              >=1.1  && <1.5,
                        scientific           >=0.3  && <0.5,
                        smallcheck           >=1.0  && <1.2,
                        text                 >=1.1  && <1.4,
@@ -180,9 +181,9 @@
                        DeriveDataTypeable,
                        DeriveGeneric,
                        RecordWildCards
-  build-depends:       base                 >=4.3  && <4.9,
+  build-depends:       base                 >=4.3  && <4.10,
                        GenericPretty        >=1.2  && <1.3,
-                       aeson                >=0.7  && <0.11,
+                       aeson                >=0.7  && <0.12,
                        bytestring           >=0.9  && <0.11,
                        containers           >=0.3  && <0.6,
                        directory            >=1.1  && <1.3,
@@ -192,7 +193,7 @@
                        lens                 >=4.1  && <4.14,
                        mtl                  >=2.1  && <2.3,
                        pretty               >=1.1  && <1.3,
-                       process              >=1.1  && <1.4,
+                       process              >=1.1  && <1.5,
                        scientific           >=0.3  && <0.5,
                        smallcheck           >=1.0  && <1.2,
                        text                 >=1.1  && <1.4,