diff --git a/main.go b/main.go
index 4ca3ea0..64dde1a 100644
--- a/main.go
+++ b/main.go
@@ -1,7 +1,7 @@
 package main
 
 /*
-Copyright (C) 2016 The `nmdc-ircfrontend' author(s)
+Copyright (C) 2016-2017 The `nmdc-ircfrontend' author(s)
 Copyright (C) 2013 Harry Jeffery
 
 This program is free software: you can redistribute it and/or modify
diff --git a/server.go b/server.go
index ed8d039..f4987f1 100644
--- a/server.go
+++ b/server.go
@@ -1,7 +1,7 @@
 package main
 
 /*
-Copyright (C) 2016 The `nmdc-ircfrontend' author(s)
+Copyright (C) 2016-2017 The `nmdc-ircfrontend' author(s)
 Copyright (C) 2013 Harry Jeffery
 
 This program is free software: you can redistribute it and/or modify
diff --git a/typedefs.go b/typedefs.go
index e20f90c..273a521 100644
--- a/typedefs.go
+++ b/typedefs.go
@@ -1,7 +1,7 @@
 package main
 
 /*
-Copyright (C) 2016 The `nmdc-ircfrontend' author(s)
+Copyright (C) 2016-2017 The `nmdc-ircfrontend' author(s)
 Copyright (C) 2013 Harry Jeffery
 
 This program is free software: you can redistribute it and/or modify