diff --git a/configure.ac b/configure.ac
index b83310684ec94a0d43499058ccc6558743e8b1d4..52cc877db6140a93e6139b335ae1dd087f8a105e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4,7 +4,7 @@ dnl Copyright (c) 2007-2019, The Tor Project, Inc.
 dnl See LICENSE for licensing information
 
 AC_PREREQ([2.63])
-AC_INIT([tor],[0.3.5.8])
+AC_INIT([tor],[0.3.5.8-dev])
 AC_CONFIG_SRCDIR([src/app/main/tor_main.c])
 AC_CONFIG_MACRO_DIR([m4])
 
diff --git a/contrib/win32build/tor-mingw.nsi.in b/contrib/win32build/tor-mingw.nsi.in
index 5af1ca0dd3f76cc8e9b81ffadafd10a433d913d3..9d82c5c3dc98a8f20903ed03f2870c528efabf39 100644
--- a/contrib/win32build/tor-mingw.nsi.in
+++ b/contrib/win32build/tor-mingw.nsi.in
@@ -8,7 +8,7 @@
 !include "LogicLib.nsh"
 !include "FileFunc.nsh"
 !insertmacro GetParameters
-!define VERSION "0.3.5.8"
+!define VERSION "0.3.5.8-dev"
 !define INSTALLER "tor-${VERSION}-win32.exe"
 !define WEBSITE "https://www.torproject.org/"
 !define LICENSE "LICENSE"
diff --git a/src/win32/orconfig.h b/src/win32/orconfig.h
index 3936dc850e318a4265d13e1a726c1070cb962d46..8512da128568144c3a0c04990c115e5d43c25233 100644
--- a/src/win32/orconfig.h
+++ b/src/win32/orconfig.h
@@ -218,7 +218,7 @@
 #define USING_TWOS_COMPLEMENT
 
 /* Version number of package */
-#define VERSION "0.3.5.8"
+#define VERSION "0.3.5.8-dev"