diff --git a/dependency.c b/dependency.c
index d917b30..6c6e8b0 100644
--- a/dependency.c
+++ b/dependency.c
@@ -2,7 +2,7 @@
  * dependency.c
  * dependency parsing and management
  *
- * Copyright (c) 2011, 2012 pkgconf authors (see AUTHORS).
+ * Copyright (c) 2011, 2012, 2013 pkgconf authors (see AUTHORS).
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
diff --git a/main.c b/main.c
index eca4031..c68f84c 100644
--- a/main.c
+++ b/main.c
@@ -2,7 +2,7 @@
  * main.c
  * main() routine, printer functions
  *
- * Copyright (c) 2011 pkgconf authors (see AUTHORS).
+ * Copyright (c) 2011, 2012, 2013 pkgconf authors (see AUTHORS).
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
diff --git a/pkg.c b/pkg.c
index 67a67b1..9dcb247 100644
--- a/pkg.c
+++ b/pkg.c
@@ -2,7 +2,7 @@
  * pkg.c
  * higher-level dependency graph compilation, management and manipulation
  *
- * Copyright (c) 2011, 2012 pkgconf authors (see AUTHORS).
+ * Copyright (c) 2011, 2012, 2013 pkgconf authors (see AUTHORS).
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above