diff --git a/build.yaml b/build.yaml
index 0aaef67cacb9aecf938f7ed50df7b4628e85b127..e99c70619bcc58bd4d49a878a362580bd79799bd 100644
--- a/build.yaml
+++ b/build.yaml
@@ -7,6 +7,7 @@ settings:
   '#3': Use "-preN" suffixes to identify pre-release versions
   '#4': Per-language overrides are possible with (eg) ruby_version tag here
   '#5': See the expand_version.py for all the quirks here
+  python_version: 0.13.0-pre2
   ruby_version: 0.13.0-pre1.1
   version: 0.13.0-pre1
 filegroups:
diff --git a/src/python/grpcio/grpc_version.py b/src/python/grpcio/grpc_version.py
index b256871bd5e96974f0f8b961fb132ff6d6c7a652..c1cf33d1b119cdd52d468a654a468b9ed29c9971 100644
--- a/src/python/grpcio/grpc_version.py
+++ b/src/python/grpcio/grpc_version.py
@@ -29,4 +29,4 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio/grpc_version.py.template`!!!
 
-VERSION='0.13.0rc1'
+VERSION='0.13.0rc2'