diff --git a/src/python/src/setup.py b/src/python/src/setup.py
index e936913cfd0f1f41bd4b8779ab7edfddb7613375..d0f4791a1e444189cd3e5f07e39f78c166014dd1 100644
--- a/src/python/src/setup.py
+++ b/src/python/src/setup.py
@@ -86,7 +86,7 @@ _PACKAGE_DIRECTORIES = {
 
 setuptools.setup(
     name='grpcio',
-    version='0.5.0a2',
+    version='0.9.0a0',
     ext_modules=[_EXTENSION_MODULE],
     packages=list(_PACKAGES),
     package_dir=_PACKAGE_DIRECTORIES,