diff --git a/configure.ac b/configure.ac
index 72c7a60f..1810e7c5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -378,7 +378,7 @@ if test ! -z "$missing_headers"; then
    AC_MSG_ERROR([missing headers: $missing_headers])
 fi
 
-AC_DEFINE_UNQUOTED(COPYRIGHT, "(C) 2004-2019 Hisham Muhammad. (C) 2020 htop dev team.", [Copyright message.])
+AC_DEFINE_UNQUOTED(COPYRIGHT, "(C) 2004-2019 Hisham Muhammad. (C) 2020-2021 htop dev team.", [Copyright message.])
 
 # We're done, let's go!
 # ----------------------------------------------------------------------