diff --git a/version.py b/version.py
index baef1d9..dc89805 100644
--- a/version.py
+++ b/version.py
@@ -14,4 +14,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "1.6.3a1"
+__version__ = "1.6.3a2"