diff --git a/configure.ac b/configure.ac
index 0f2b0b18fa75424866349bc4abc8de5257b46508..9261c14f7e79a6c4450a9b224477de8edceeb729 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 AC_INIT([Gajim - A Jabber Instant Messager],
-		[0.12.1.5-dev],[http://trac.gajim.org/],[gajim])
+		[0.12.3.1-dev],[http://trac.gajim.org/],[gajim])
 AC_PREREQ([2.59])
 
 AC_CONFIG_HEADER(config.h)
diff --git a/src/common/defs.py b/src/common/defs.py
index 42599f47a8821b091f1f3878c859c50413882bda..c321440d0c6a339d348f9bd5f4c4aa82c628c83d 100644
--- a/src/common/defs.py
+++ b/src/common/defs.py
@@ -27,7 +27,7 @@ docdir = '../'
 datadir = '../'
 localedir = '../po'
 
-version = '0.12.1.5-dev'
+version = '0.12.3.1-dev'
 
 import sys, os.path
 for base in ('.', 'common'):