diff --git a/OpenSSL/version.py b/OpenSSL/version.py
index b7255e9..2f1bed7 100644
--- a/OpenSSL/version.py
+++ b/OpenSSL/version.py
@@ -6,4 +6,4 @@
 pyOpenSSL - A simple wrapper around the OpenSSL library
 """
 
-__version__ = '0.12'
+__version__ = '0.13a1'