diff --git a/src/emq_mod_retainer.erl b/src/emq_mod_retainer.erl
index 5244313..240246e 100644
--- a/src/emq_mod_retainer.erl
+++ b/src/emq_mod_retainer.erl
@@ -1,5 +1,5 @@
 %%--------------------------------------------------------------------
-%% Copyright (c) 2012-2016 Feng Lee <feng@emqtt.io>.
+%% Copyright (c) 2012-2017 Feng Lee <feng@emqtt.io>.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
diff --git a/src/emq_mod_retainer_app.erl b/src/emq_mod_retainer_app.erl
index 0d44be6..fce23c1 100644
--- a/src/emq_mod_retainer_app.erl
+++ b/src/emq_mod_retainer_app.erl
@@ -1,5 +1,5 @@
 %%--------------------------------------------------------------------
-%% Copyright (c) 2012-2016 Feng Lee <feng@emqtt.io>.
+%% Copyright (c) 2012-2017 Feng Lee <feng@emqtt.io>.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
diff --git a/src/emq_mod_retainer_sup.erl b/src/emq_mod_retainer_sup.erl
index 231ea4e..1a0a241 100644
--- a/src/emq_mod_retainer_sup.erl
+++ b/src/emq_mod_retainer_sup.erl
@@ -1,5 +1,5 @@
 %%--------------------------------------------------------------------
-%% Copyright (c) 2012-2016 Feng Lee <feng@emqtt.io>.
+%% Copyright (c) 2012-2017 Feng Lee <feng@emqtt.io>.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.