diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+# 0.4.2.1
+
+* Added forgotten copyright/authorship information.
+
 # 0.4.2.0
 
 * New minor release (microlens-0.4.2).
diff --git a/LICENSE b/LICENSE
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,5 @@
-Copyright (c) 2015, Artyom
+Copyright (c) 2013-2016 Edward Kmett,
+              2015-2016 Artyom
 
 All rights reserved.
 
diff --git a/microlens-ghc.cabal b/microlens-ghc.cabal
--- a/microlens-ghc.cabal
+++ b/microlens-ghc.cabal
@@ -1,5 +1,5 @@
 name:                microlens-ghc
-version:             0.4.2.0
+version:             0.4.2.1
 synopsis:            microlens + array, bytestring, containers, transformers
 description:
   Use this package instead of <http://hackage.haskell.org/package/microlens microlens> if you don't mind depending on all dependencies here – @Lens.Micro.GHC@ reexports everything from @Lens.Micro@ and additionally provides orphan instances of microlens classes for packages coming with GHC (<http://hackage.haskell.org/package/array array>, <http://hackage.haskell.org/package/bytestring bytestring>, <http://hackage.haskell.org/package/containers containers>, <http://hackage.haskell.org/package/transfromers transformers>).
@@ -9,7 +9,7 @@
   This package is a part of the <http://hackage.haskell.org/package/microlens microlens> family; see the readme <https://github.com/aelve/microlens#readme on Github>.
 license:             BSD3
 license-file:        LICENSE
-author:              Artyom
+author:              Edward Kmett, Artyom
 maintainer:          Artyom <yom@artyom.me>
 homepage:            http://github.com/aelve/microlens
 bug-reports:         http://github.com/aelve/microlens/issues
diff --git a/src/Lens/Micro/GHC.hs b/src/Lens/Micro/GHC.hs
--- a/src/Lens/Micro/GHC.hs
+++ b/src/Lens/Micro/GHC.hs
@@ -15,6 +15,10 @@
 
 
 {- |
+Module      :  Lens.Micro.GHC
+Copyright   :  (C) 2013-2016 Edward Kmett, 2015-2016 Artyom
+License     :  BSD-style (see the file LICENSE)
+
 By importing this module you get all functions and types from <http://hackage.haskell.org/package/microlens microlens>, as well as the following instances:
 
 * 'at' for 'Map' and 'IntMap'
diff --git a/src/Lens/Micro/GHC/Internal.hs b/src/Lens/Micro/GHC/Internal.hs
--- a/src/Lens/Micro/GHC/Internal.hs
+++ b/src/Lens/Micro/GHC/Internal.hs
@@ -5,6 +5,11 @@
   #-}
 
 
+{- |
+Module      :  Lens.Micro.GHC.Internal
+Copyright   :  (C) 2013-2016 Edward Kmett, 2015-2016 Artyom
+License     :  BSD-style (see the file LICENSE)
+-}
 module Lens.Micro.GHC.Internal
 (
   IsByteString(..),