diff --git a/COPYING b/COPYING
index 1dbc38f..81a5221 100644
--- a/COPYING
+++ b/COPYING
@@ -1,4 +1,5 @@
-Copyright (c) 2011, 2012, 2013, 2014, 2015, 2016 pkgconf authors (see AUTHORS).
+Copyright (c) 2011, 2012, 2013, 2014, 2015, 2016, 2017
+    pkgconf authors (see AUTHORS file in source directory).
 
 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 066b7c1..bee673d 100644
--- a/main.c
+++ b/main.c
@@ -2,7 +2,8 @@
  * main.c
  * main() routine, printer functions
  *
- * Copyright (c) 2011, 2012, 2013, 2014, 2015, 2016 pkgconf authors (see AUTHORS).
+ * Copyright (c) 2011, 2012, 2013, 2014, 2015, 2016, 2017
+ *     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
@@ -521,7 +522,8 @@ static void
 about(void)
 {
 	printf("%s %s\n", PACKAGE_NAME, PACKAGE_VERSION);
-	printf("Copyright (c) 2011, 2012, 2013, 2014, 2015, 2016 pkgconf authors (see AUTHORS in documentation directory).\n\n");
+	printf("Copyright (c) 2011, 2012, 2013, 2014, 2015, 2016, 2017\n");
+	printf("    pkgconf authors (see AUTHORS in documentation directory).\n\n");
 	printf("Permission to use, copy, modify, and/or distribute this software for any\n");
 	printf("purpose with or without fee is hereby granted, provided that the above\n");
 	printf("copyright notice and this permission notice appear in all copies.\n\n");