diff --git a/Changes b/Changes
index 8b694aa8a..19a6f2b44 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,9 @@ Revision history for Verilator
 
 The contributors that suggested a given feature are shown in []. Thanks!
 
+* Verilator 3.921 devel
+
+
 * Verilator 3.920 2018-02-01
 
 **    Moving forward, use the git "stable" branch to track the latest release,
diff --git a/configure.ac b/configure.ac
index 63a0420e1..be850479d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -6,7 +6,7 @@
 
 #AC_INIT([Verilator],[#.### YYYY-MM-DD])
 #AC_INIT([Verilator],[#.### devel])
-AC_INIT([Verilator],[3.920 2018-02-01])
+AC_INIT([Verilator],[3.921 devel])
 # When releasing, also update header of Changes file
 # and commit using "devel release" or "Version bump" message