diff --git a/version.py b/version.py
index 6590b98..9975ed5 100644
--- a/version.py
+++ b/version.py
@@ -1,6 +1,6 @@
 # START_VERSION_BLOCK
 VERSION_MAJOR = 0
 VERSION_MINOR = 5
-VERSION_BUILD = 12
-VERSION_ALPHA = 0
+VERSION_BUILD = 13
+VERSION_ALPHA = 1
 # END_VERSION_BLOCK