diff --git a/configure.ac b/configure.ac
index 683930c..e58fc28 100644
--- a/configure.ac
+++ b/configure.ac
@@ -24,8 +24,8 @@ define([_GUI_VERSION_MINOR], [16])
 AC_INIT([OpenVPN GUI],[_GUI_VERSION_MAJOR],[openvpn-devel@lists.sourceforge.net],[openvpn-gui],[https://github.com/openvpn/openvpn-gui/])
 AC_DEFINE([PACKAGE_VERSION_RESOURCE], [_GUI_VERSION_MAJOR,_GUI_VERSION_MINOR,0,0], [Version in windows resource format])
 AC_DEFINE([PACKAGE_VERSION_RESOURCE_STR], ["_GUI_VERSION_MAJOR._GUI_VERSION_MINOR.0.0"], [Version as a string])
-AC_DEFINE([GUI_COPYRIGHT_YEAR_END], ["2018"], [Last copyright year for GUI in About tab])
-AC_DEFINE([CORE_COPYRIGHT_YEAR_END], ["2018"], [Last copyright year for daemon in About tab])
+AC_DEFINE([GUI_COPYRIGHT_YEAR_END], ["2020"], [Last copyright year for GUI in About tab])
+AC_DEFINE([CORE_COPYRIGHT_YEAR_END], ["2020"], [Last copyright year for daemon in About tab])
 AC_CONFIG_AUX_DIR([.])
 AM_CONFIG_HEADER([config.h])
 AC_CONFIG_SRCDIR([main.h])