diff --git a/Changes b/Changes
index 5bdbe0afa..d120e7359 100644
--- a/Changes
+++ b/Changes
@@ -3,6 +3,9 @@ Revision history for Verilator
 The contributors that suggested a given feature are shown in []. Thanks!
 
 
+* Verilator 4.101 devel
+
+
 * Verilator 4.100 2020-09-07
 
 **    C++11 or newer compilers are now required.
diff --git a/configure.ac b/configure.ac
index 1cb0dd8d5..2f3e77ea0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -7,7 +7,7 @@
 
 #AC_INIT([Verilator],[#.### YYYY-MM-DD])
 #AC_INIT([Verilator],[#.### devel])
-AC_INIT([Verilator],[4.100 2020-09-07],
+AC_INIT([Verilator],[4.101 devel],
         [https://verilator.org],
         [verilator],[https://verilator.org])
 # When releasing, also update header of Changes file