diff --git a/.gitattributes b/.gitattributes
index 6b770aa..8cf7ff4 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1,5 +1,5 @@
 # 
-# Copyright (C) 2020  CismonX <admin@cismon.net>
+# Copyright (C) 2020,2021  CismonX <admin@cismon.net>
 # 
 # Copying and distribution of this file, with or without modification, are
 # permitted in any medium without royalty, provided the copyright notice and
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index fbeaa96..65d1578 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,5 +1,5 @@
 # 
-# Copyright (C) 2020  CismonX <admin@cismon.net>
+# Copyright (C) 2020,2021  CismonX <admin@cismon.net>
 # 
 # Copying and distribution of this file, with or without modification, are
 # permitted in any medium without royalty, provided the copyright notice and
diff --git a/.gitignore b/.gitignore
index 24d1001..2df4e8a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,5 @@
 # 
-# Copyright (C) 2020  CismonX <admin@cismon.net>
+# Copyright (C) 2020,2021  CismonX <admin@cismon.net>
 # 
 # Copying and distribution of this file, with or without modification, are
 # permitted in any medium without royalty, provided the copyright notice and
diff --git a/INSTALL.md b/INSTALL.md
index 2df441c..a29148a 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -1,5 +1,5 @@
 <!--
-Copyright (C) 2020  CismonX <admin@cismon.net>
+Copyright (C) 2020,2021  CismonX <admin@cismon.net>
 
 Copying and distribution of this file, with or without modification, are
 permitted in any medium without royalty, provided the copyright notice and
diff --git a/Makefile.am b/Makefile.am
index 0d37e21..c4dd865 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,5 +1,5 @@
 # 
-# Copyright (C) 2020  CismonX <admin@cismon.net>
+# Copyright (C) 2020,2021  CismonX <admin@cismon.net>
 # 
 # Copying and distribution of this file, with or without modification, are
 # permitted in any medium without royalty, provided the copyright notice and
diff --git a/README.md b/README.md
index ed9ab54..304d676 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 <!--
-Copyright (C) 2020  CismonX <admin@cismon.net>
+Copyright (C) 2020,2021  CismonX <admin@cismon.net>
 
 Copying and distribution of this file, with or without modification, are
 permitted in any medium without royalty, provided the copyright notice and
diff --git a/configure.ac b/configure.ac
index a348435..f34de68 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 dnl 
-dnl Copyright (C) 2020  CismonX <admin@cismon.net>
+dnl Copyright (C) 2020,2021  CismonX <admin@cismon.net>
 dnl 
 dnl Copying and distribution of this file, with or without modification, are
 dnl permitted in any medium without royalty, provided the copyright notice and
diff --git a/doc/.gitignore b/doc/.gitignore
index 4716ea1..b3933bf 100644
--- a/doc/.gitignore
+++ b/doc/.gitignore
@@ -1,5 +1,5 @@
 # 
-# Copyright (C) 2020  CismonX <admin@cismon.net>
+# Copyright (C) 2020,2021  CismonX <admin@cismon.net>
 # 
 # Copying and distribution of this file, with or without modification, are
 # permitted in any medium without royalty, provided the copyright notice and
diff --git a/doc/Makefile.am b/doc/Makefile.am
index 6f7ad6b..292e5b3 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -1,5 +1,5 @@
 # 
-# Copyright (C) 2020  CismonX <admin@cismon.net>
+# Copyright (C) 2020,2021  CismonX <admin@cismon.net>
 # 
 # Copying and distribution of this file, with or without modification, are
 # permitted in any medium without royalty, provided the copyright notice and
diff --git a/examples/.gitignore b/examples/.gitignore
index cf3f8f4..0c4dda8 100644
--- a/examples/.gitignore
+++ b/examples/.gitignore
@@ -1,5 +1,5 @@
 # 
-# Copyright (C) 2020  CismonX <admin@cismon.net>
+# Copyright (C) 2020,2021  CismonX <admin@cismon.net>
 # 
 # Copying and distribution of this file, with or without modification, are
 # permitted in any medium without royalty, provided the copyright notice and
diff --git a/examples/Makefile.am b/examples/Makefile.am
index 6134ecc..8216e76 100644
--- a/examples/Makefile.am
+++ b/examples/Makefile.am
@@ -1,5 +1,5 @@
 # 
-# Copyright (C) 2020  CismonX <admin@cismon.net>
+# Copyright (C) 2020,2021  CismonX <admin@cismon.net>
 # 
 # Copying and distribution of this file, with or without modification, are
 # permitted in any medium without royalty, provided the copyright notice and
diff --git a/examples/sixdraw.c b/examples/sixdraw.c
index c14e496..d429d1e 100644
--- a/examples/sixdraw.c
+++ b/examples/sixdraw.c
@@ -9,7 +9,7 @@
  * to report mouse position in pixels using DEC locator (which is also rarely
  * implemented). However, it is not used in this example.
  * 
- * Copyright (C) 2020  CismonX <admin@cismon.net>
+ * Copyright (C) 2020,2021  CismonX <admin@cismon.net>
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/man/Makefile.am b/man/Makefile.am
index 324b814..cfc68d7 100644
--- a/man/Makefile.am
+++ b/man/Makefile.am
@@ -1,5 +1,5 @@
 # 
-# Copyright (C) 2020  CismonX <admin@cismon.net>
+# Copyright (C) 2020,2021  CismonX <admin@cismon.net>
 # 
 # Copying and distribution of this file, with or without modification, are
 # permitted in any medium without royalty, provided the copyright notice and
diff --git a/src/.gitignore b/src/.gitignore
index ec6aa6f..99d160d 100644
--- a/src/.gitignore
+++ b/src/.gitignore
@@ -1,5 +1,5 @@
 # 
-# Copyright (C) 2020  CismonX <admin@cismon.net>
+# Copyright (C) 2020,2021  CismonX <admin@cismon.net>
 # 
 # Copying and distribution of this file, with or without modification, are
 # permitted in any medium without royalty, provided the copyright notice and
diff --git a/src/Makefile.am b/src/Makefile.am
index 7bcb706..2e72f2e 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1,5 +1,5 @@
 # 
-# Copyright (C) 2020  CismonX <admin@cismon.net>
+# Copyright (C) 2020,2021  CismonX <admin@cismon.net>
 # 
 # Copying and distribution of this file, with or without modification, are
 # permitted in any medium without royalty, provided the copyright notice and
diff --git a/src/ctlseqs.c b/src/ctlseqs.c
index 5046497..3154d61 100644
--- a/src/ctlseqs.c
+++ b/src/ctlseqs.c
@@ -1,7 +1,7 @@
 /**
  * ctlseqs.c - helper library for terminal control sequences
  * 
- * Copyright (C) 2020  CismonX <admin@cismon.net>
+ * Copyright (C) 2020,2021  CismonX <admin@cismon.net>
  * 
  * This file is part of the ctlseqs library.
  *
diff --git a/src/ctlseqs.h b/src/ctlseqs.h
index 3c67f0b..36f1454 100644
--- a/src/ctlseqs.h
+++ b/src/ctlseqs.h
@@ -1,7 +1,7 @@
 /**
  * ctlseqs.h - helper library for terminal control sequences
  * 
- * Copyright (C) 2020  CismonX <admin@cismon.net>
+ * Copyright (C) 2020,2021  CismonX <admin@cismon.net>
  * 
  * This file is part of the ctlseqs library.
  *
diff --git a/tests/.gitignore b/tests/.gitignore
index 376b04d..5c05d9d 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -1,5 +1,5 @@
 # 
-# Copyright (C) 2020  CismonX <admin@cismon.net>
+# Copyright (C) 2020,2021  CismonX <admin@cismon.net>
 # 
 # Copying and distribution of this file, with or without modification, are
 # permitted in any medium without royalty, provided the copyright notice and
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 4b4acc8..ab2676d 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -1,5 +1,5 @@
 # 
-# Copyright (C) 2020  CismonX <admin@cismon.net>
+# Copyright (C) 2020,2021  CismonX <admin@cismon.net>
 # 
 # Copying and distribution of this file, with or without modification, are
 # permitted in any medium without royalty, provided the copyright notice and
diff --git a/tests/tcsgrep.c b/tests/tcsgrep.c
index 03ae2d5..0dd9ccf 100644
--- a/tests/tcsgrep.c
+++ b/tests/tcsgrep.c
@@ -1,7 +1,7 @@
 /**
  * tcsgrep.c - match input against terminal control sequence patterns
  * 
- * Copyright (C) 2020  CismonX <admin@cismon.net>
+ * Copyright (C) 2020,2021  CismonX <admin@cismon.net>
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by