diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,6 +1,9 @@
 # Changelog for gray-extended
 
+1.5.5 Revamped to work with Nix + cabal-install
+
 1.5.4 Revamped to work with Nix + Stack.
+
 1.5.3 Upgrade to work with Stack 1.9.3
 
 ## Unreleased changes
diff --git a/LICENSE b/LICENSE
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright Amy de Buitléir (c) 2010-2018
+Copyright Amy de Buitléir (c) 2010-2019
 
 All rights reserved.
 
diff --git a/gray-extended.cabal b/gray-extended.cabal
--- a/gray-extended.cabal
+++ b/gray-extended.cabal
@@ -1,13 +1,7 @@
 cabal-version: 1.12
 
--- This file has been generated from package.yaml by hpack version 0.31.1.
---
--- see: https://github.com/sol/hpack
---
--- hash: 1a5c42639130c135e232c7689ca7e256d24235e76025fadf6e431e42aa038cb5
-
 name:           gray-extended
-version:        1.5.4
+version:        1.5.5
 synopsis:       Gray encoding schemes
 description:    Please see the README on GitHub at <https://github.com/mhwombat/gray-extended#readme>
 category:       Math
@@ -15,7 +9,7 @@
 bug-reports:    https://github.com/mhwombat/gray-extended/issues
 author:         Amy de Buitléir
 maintainer:     amy@nualeargais.ie
-copyright:      2018 Amy de Buitléir
+copyright:     2018-2019 Amy de Buitléir
 license:        BSD3
 license-file:   LICENSE
 build-type:     Simple
diff --git a/src/Codec/Gray.hs b/src/Codec/Gray.hs
--- a/src/Codec/Gray.hs
+++ b/src/Codec/Gray.hs
@@ -1,7 +1,7 @@
 ------------------------------------------------------------------------
 -- |
 -- Module      :  Codec.Gray
--- Copyright   :  (c) Amy de Buitléir 2011-2012
+-- Copyright   :  (c) Amy de Buitléir 2011-2019
 -- License     :  BSD-style
 -- Maintainer  :  amy@nualeargais.ie
 -- Stability   :  experimental