diff --git a/configure.ac b/configure.ac
index 3351bfc2c..644e60caf 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,13 +1,13 @@
 # DESCRIPTION: Process this file with autoconf to produce a configure script.
 #
-# Copyright 2003-2021 by Wilson Snyder. Verilator is free software; you
+# Copyright 2003-2022 by Wilson Snyder. Verilator is free software; you
 # can redistribute it and/or modify it under the terms of either the GNU Lesser
 # General Public License Version 3 or the Perl Artistic License Version 2.0.
 # SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 
 #AC_INIT([Verilator],[#.### YYYY-MM-DD])
 #AC_INIT([Verilator],[#.### devel])
-AC_INIT([Verilator],[4.216 2021-12-05],
+AC_INIT([Verilator],[4.217 devel],
         [https://verilator.org],
         [verilator],[https://verilator.org])
 # When releasing, also update header of Changes file