diff --git a/PDP10/kl10_fe.c b/PDP10/kl10_fe.c
index 9a3c2b4..524599f 100644
--- a/PDP10/kl10_fe.c
+++ b/PDP10/kl10_fe.c
@@ -1,6 +1,6 @@
 /* kl10_fe.c: KL-10 front end (console terminal) simulator
 
-   Copyright (c) 2013-2019, Richard Cornwell
+   Copyright (c) 2019-2020, Richard Cornwell
 
    Permission is hereby granted, free of charge, to any person obtaining a
    copy of this software and associated documentation files (the "Software"),
diff --git a/PDP10/kl10_nia.c b/PDP10/kl10_nia.c
index 8456409..a9b73f7 100644
--- a/PDP10/kl10_nia.c
+++ b/PDP10/kl10_nia.c
@@ -1,6 +1,6 @@
 /* kl10_NIA.c: NIA 20 Network interface.
 
-   Copyright (c) 2019, Richard Cornwell.
+   Copyright (c) 2020, Richard Cornwell.
 
    Permission is hereby granted, free of charge, to any person obtaining a
    copy of this software and associated documentation files (the "Software"),