diff --git a/LICENSE b/LICENSE
index ae2a0ce..2b4f768 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright (c) 2012-2016, Mitsutoshi Aoe
+Copyright (c) 2012-2017, Mitsutoshi Aoe
 
 All rights reserved.
 
diff --git a/lifted-async.cabal b/lifted-async.cabal
index 5934a3f..82023a1 100644
--- a/lifted-async.cabal
+++ b/lifted-async.cabal
@@ -7,7 +7,7 @@ license:             BSD3
 license-file:        LICENSE
 author:              Mitsutoshi Aoe
 maintainer:          Mitsutoshi Aoe <maoe@foldr.in>
-copyright:           Copyright (C) 2012-2016 Mitsutoshi Aoe
+copyright:           Copyright (C) 2012-2017 Mitsutoshi Aoe
 category:            Concurrency
 build-type:          Simple
 cabal-version:       >= 1.8
diff --git a/src/Control/Concurrent/Async/Lifted.hs b/src/Control/Concurrent/Async/Lifted.hs
index d82fbd9..7005c45 100644
--- a/src/Control/Concurrent/Async/Lifted.hs
+++ b/src/Control/Concurrent/Async/Lifted.hs
@@ -7,7 +7,7 @@
 
 {- |
 Module      : Control.Concurrent.Async.Lifted
-Copyright   : Copyright (C) 2012-2016 Mitsutoshi Aoe
+Copyright   : Copyright (C) 2012-2017 Mitsutoshi Aoe
 License     : BSD-style (see the file LICENSE)
 Maintainer  : Mitsutoshi Aoe <maoe@foldr.in>
 Stability   : experimental
diff --git a/src/Control/Concurrent/Async/Lifted/Safe.hs b/src/Control/Concurrent/Async/Lifted/Safe.hs
index 31711f9..15ea22e 100644
--- a/src/Control/Concurrent/Async/Lifted/Safe.hs
+++ b/src/Control/Concurrent/Async/Lifted/Safe.hs
@@ -12,7 +12,7 @@
 
 {- |
 Module      : Control.Concurrent.Async.Lifted.Safe
-Copyright   : Copyright (C) 2012-2016 Mitsutoshi Aoe
+Copyright   : Copyright (C) 2012-2017 Mitsutoshi Aoe
 License     : BSD-style (see the file LICENSE)
 Maintainer  : Mitsutoshi Aoe <maoe@foldr.in>
 Stability   : experimental