diff --git a/CHANGELOG b/CHANGELOG
new file mode 100644
--- /dev/null
+++ b/CHANGELOG
@@ -0,0 +1,32 @@
+OddWord - Release History
+
+release-1.0.1.1 - 2018.04.05
+
+  * Added criterion benchmark
+  * Renamed NEWS file to CHANGELOG.
+  * Relaxed QuickCheck version constraint.
+
+release-1.0.1.0 - 2015.10.25
+
+  * Added optional support for GHC type-level literals.
+  * Added FiniteBits instance.
+  * Added more test coverage.
+  * Fixed bug in toEnum function and extended test suite. (Thanks to Pasqualino
+    "Titto" Assini)
+  * Fixed warnings when compiling test suite with base-4.7 (GHC 7.8).
+  * Relaxed QuickCheck version constraint.
+
+release-1.0.0.2 - 2013.05.14
+
+  * Fixed misdefinition of type synonyms for Word10, Word12, and Word14,
+    and extended test suite. (Thanks to Benno Fünfstück)
+
+release-1.0.0.1 - 2012.12.30
+
+  * Fixed compilation with base-4.6 (GHC 7.6).
+  * Fixed bug in Read instance and extended test suite. (Thanks to Tikhon
+    Jelvis)
+
+release-1.0.0 - 2011.07.21
+
+  * Initial release.
diff --git a/LICENSE b/LICENSE
--- a/LICENSE
+++ b/LICENSE
@@ -1,7 +1,7 @@
 The following license covers this documentation, and the source code, except
 where otherwise indicated.
 
-Copyright 2011-2015, Robin KAY. All rights reserved.
+Copyright 2011-2018, Robin KAY. All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are met:
diff --git a/NEWS b/NEWS
deleted file mode 100644
--- a/NEWS
+++ /dev/null
@@ -1,25 +0,0 @@
-OddWord - Release History
-
-release-1.0.1.0 - 2015.10.25
-
-  * Added optional support for GHC type-level literals.
-  * Added FiniteBits instance.
-  * Added more test coverage.
-  * Fixed bug in toEnum function and extended test suite. (Thanks to Pasqualino     "Titto" Assini)
-  * Fixed warnings when compiling test suite with base-4.7 (GHC 7.8).
-  * Relaxed QuickCheck version constraint.
-
-release-1.0.0.2 - 2013.05.14
-
-  * Fixed misdefinition of type synonyms for Word10, Word12, and Word14,
-    and extended test suite. (Thanks to Benno Fünfstück)
-
-release-1.0.0.1 - 2012.12.30
-
-  * Fixed compilation with base-4.6 (GHC 7.6).
-  * Fixed bug in Read instance and extended test suite. (Thanks to Tikhon
-    Jelvis)
-
-release-1.0.0 - 2011.07.21
-
-  * Initial release.
diff --git a/OddWord.cabal b/OddWord.cabal
--- a/OddWord.cabal
+++ b/OddWord.cabal
@@ -1,8 +1,8 @@
 name:               OddWord
-version:            1.0.1.0
+version:            1.0.1.1
 license:            BSD3
 license-file:       LICENSE
-copyright:          (c) 2011-2015 Robin KAY
+copyright:          (c) 2011-2018 Robin KAY
 author:             Robin KAY
 maintainer:         Robin KAY <komadori@gekkou.co.uk>
 synopsis:           Provides a wrapper for deriving word types with fewer bits.
@@ -10,7 +10,7 @@
 stability:          Stable
 cabal-version:      >= 1.10
 build-type:         Simple
-extra-source-files: test/*.hs NEWS
+extra-source-files: test/*.hs bench/*.hs CHANGELOG
 homepage:           http://www.gekkou.co.uk/
 description:
     Provdes the 'OddWord' type, which wraps an existing integer type and
@@ -40,8 +40,8 @@
     other-extensions: ScopedTypeVariables CPP
     build-depends:
         base       >= 4.5 && < 5,
-        QuickCheck >= 2.4 && < 2.9,
-        OddWord    >= 1.0 && < 1.1
+        QuickCheck >= 2.4 && < 2.12,
+        OddWord
 
 Test-Suite oddword-tests-typelits
     type:             exitcode-stdio-1.0
@@ -52,9 +52,19 @@
         buildable: True
         build-depends:
             base       >= 4.5 && < 5,
-            OddWord    >= 1.0 && < 1.1
+            OddWord
     else
         buildable: False
+
+Benchmark oddword-bench
+    type:             exitcode-stdio-1.0
+    hs-source-dirs:   bench
+    main-is:          Main.hs
+    default-language: Haskell2010
+    build-depends:
+        base       >= 4.5 && < 5,
+        criterion  >= 1.4 && < 1.5,
+        OddWord
 
 Source-repository head
     type:     darcs
diff --git a/bench/Main.hs b/bench/Main.hs
new file mode 100644
--- /dev/null
+++ b/bench/Main.hs
@@ -0,0 +1,19 @@
+module Main where
+
+import Data.Word
+import Data.Word.Odd
+import Criterion.Main
+
+testAddMul :: (Num a) => a -> a
+testAddMul n = 2*n*n + 3*n + 4
+
+main :: IO ()
+main =
+    defaultMain [
+        bgroup "Word" [
+            bench "addMul" $ whnf testAddMul (1::Word)
+        ],
+        bgroup "Word20" [
+            bench "addMul" $ whnf testAddMul (1::Word20)
+        ]
+    ]