diff --git a/msgpack/__init__.py b/msgpack/__init__.py
index e796efb0..c2525444 100644
--- a/msgpack/__init__.py
+++ b/msgpack/__init__.py
@@ -4,8 +4,8 @@
 from .exceptions import *  # noqa: F403
 from .ext import ExtType, Timestamp
 
-version = (1, 0, 8)
-__version__ = "1.0.8"
+version = (1, 1, 0, "rc1")
+__version__ = "1.1.0rc1"
 
 
 if os.environ.get("MSGPACK_PUREPYTHON"):