diff --git a/modelscope/version.py b/modelscope/version.py
index bb262e90..0a98fac3 100644
--- a/modelscope/version.py
+++ b/modelscope/version.py
@@ -1,5 +1,5 @@
 # Make sure to modify __release_datetime__ to release time when making official release.
-__version__ = '1.8.1'
+__version__ = '1.9.0rc0'
 # default release datetime for branches under active development is set
 # to be a time far-far-away-into-the-future
-__release_datetime__ = '2099-10-13 08:56:12'
+__release_datetime__ = '2023-09-03 00:00:00'