diff --git a/eventlet/__init__.py b/eventlet/__init__.py
index 6b87a32..263e8d8 100644
--- a/eventlet/__init__.py
+++ b/eventlet/__init__.py
@@ -1,4 +1,4 @@
-version_info = (0, 9, 9)
+version_info = (0, 9, 10, "dev1")
 __version__ = ".".join(map(str, version_info))
 
 try: