diff --git a/configure.ac b/configure.ac
index 182cc1bee5ec50add9e32f4ca8f1db48d19faacd..c27cbd2c85a48d1086e29d7e28ac18d68544dce2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3,7 +3,7 @@ dnl Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson
 dnl Copyright (c) 2007-2013, The Tor Project, Inc.
 dnl See LICENSE for licensing information
 
-AC_INIT([tor],[0.2.4.10-alpha])
+AC_INIT([tor],[0.2.4.10-alpha-dev])
 AC_CONFIG_SRCDIR([src/or/main.c])
 AM_INIT_AUTOMAKE
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
diff --git a/contrib/tor-mingw.nsi.in b/contrib/tor-mingw.nsi.in
index 2ee97ed7fc757976326248e44bbcd10394cd9f77..d5379bd578c2497c5323d9157fca55b58640ecdf 100644
--- a/contrib/tor-mingw.nsi.in
+++ b/contrib/tor-mingw.nsi.in
@@ -8,7 +8,7 @@
 !include "LogicLib.nsh"
 !include "FileFunc.nsh"
 !insertmacro GetParameters
-!define VERSION "0.2.4.10-alpha"
+!define VERSION "0.2.4.10-alpha-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 8a64114d6eea92b7d90f6647c3d0d5fd7f22ef6f..4312d9fbe50638f8cb8510281585b66734cf5644 100644
--- a/src/win32/orconfig.h
+++ b/src/win32/orconfig.h
@@ -241,7 +241,7 @@
 #define USING_TWOS_COMPLEMENT
 
 /* Version number of package */
-#define VERSION "0.2.4.10-alpha"
+#define VERSION "0.2.4.10-alpha-dev"