diff --git a/README b/README
index e78337993335ad4b25569f4aed669f9d3305a341..2641754339f05c75954ebac2cfc6a8c7d0ad24fd 100644
--- a/README
+++ b/README
@@ -3,7 +3,7 @@
 			    On-Screen Display Daemon
 
 		       (c) 2010 Martin Mares <mj@ucw.cz>
-	      (c) 2021 Jiří Kalvoda <jirikalvoda@kam.mff.cuni.cz>
+	   (c) 2020--2021 Jiri Kalvoda <jirikalvoda@kam.mff.cuni.cz>
 
        You can use and distribute this program under the terms of GPLv2.
 
diff --git a/display.c b/display.c
index 4d4a7125ccb55142eb11de57b4928378ef8d38ee..08a680b84bf695b4417b87f5efc46ae571c3ec6c 100644
--- a/display.c
+++ b/display.c
@@ -2,6 +2,7 @@
  *	On-screen Display
  *
  *	(c) 2013--2014 Martin Mares <mj@ucw.cz>
+ *	(c) 2020--2021 Jiri Kalvoda <jirikalvoda@kam.mff.cuni.cz>
  *
  *	This code is heavily inspired by the libxosd library,
  *	which is (c) 2000, 2001 Andre Renaud <andre@ignavus.net>.
diff --git a/display.h b/display.h
index 379451df9b1a59298f4034ae1b6c97783abb710b..131f7c3ee402344837acb433acfa0a5f94e16be8 100644
--- a/display.h
+++ b/display.h
@@ -2,6 +2,7 @@
  *	On-screen Display
  *
  *	(c) 2013--2014 Martin Mares <mj@ucw.cz>
+ *	(c) 2020--2021 Jiri Kalvoda <jirikalvoda@kam.mff.cuni.cz>
  */
 
 #include <stdbool.h>
diff --git a/osdd.c b/osdd.c
index 0f5723bc9bfa650772d8dde0573c3ccacda79a31..a92fbe06d0138ef2fc181fd85dd488bde5d6690b 100644
--- a/osdd.c
+++ b/osdd.c
@@ -2,6 +2,7 @@
  *	On-screen Display Daemon
  *
  *	(c) 2010--2014 Martin Mares <mj@ucw.cz>
+ *	(c) 2020--2021 Jiri Kalvoda <jirikalvoda@kam.mff.cuni.cz>
  */
 
 #include <stdio.h>