diff --git a/setup.cfg b/setup.cfg
index 112698b..1def7d1 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = WSME
-version = 0.5a1
+version = 0.5b1
 
 author = "Christophe de Vienne"
 author-email = "python-wsme@googlegroups.com"