diff --git a/version_template.py b/version_template.py
index 29e7463a78..23f7f1ed7e 100644
--- a/version_template.py
+++ b/version_template.py
@@ -28,7 +28,7 @@
 #  - don't import even standard modules at global scope without renaming them
 #    to have leading/trailing underscores
 
-baseVersion = '5.12.0a1'
+baseVersion = '5.13.0a1'
 cgcloudVersion = '1.6.0a1.dev393'